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Fuel Flow Display
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SkySteve

Joined: 16 Dec 2007
Posts: 94
Location: Huntsville, UT

Posted: Fri Mar 13, 2009 8:10 am Post subject: Re: Fuel Flow Display

Dick,

My meter goes through the same routine as yours when I turn on the mater switch IF it is NOT connected to the transducer.  If it is connected to the transducer, the meter does not turn on.  It acts like there is a direct short either in the 5 pin connector or in the transducer.  



I have called Northstar, and listened to their music for 45 minutes, with no human response from them.  I have also sent an email, but no response from that either.

_________________
Steve Wilson
Huntsville, UT
Kitfox Model 1- 85DD
912A / 3 Blade Warp Drive
Convertible Nosewheel & Tailwheel

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Fri Mar 13, 2009 5:55 pm Post subject: Re: Fuel Flow Display

did you guys try to power up the unit without it being hooked to the ducer first?  or was it hooked to ducer, and would not power up on the initial try?  Alot of instruments don't like to have power to them without the ducer being installed.  If that was the case, and you were impatient and wanted to see what it would do before the ducer was hooked up, you may have toasted a good instrument.



Don't know for sure if you did or not, just tossing it out there.



snake

_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Fri Mar 13, 2009 6:40 pm Post subject: Fuel Flow Display

Kinda like starting the ol' engine up without a prop, eh Snake, just  

to see what she sounds like? A little impatience at the wrong time  

might not be a good thing.



Speaking of fuel flow, I was flying today, and even into a 10 mph  

wind at about 90 mph, I was able to twist the throttle back to see  

2.9 gph on my Northstar Fuel Flow meter. It's surprising how just a  

little less throttle will gain so much in fuel economy.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 610 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying

do not archive



On Mar 13, 2009, at 9:55 PM, akflyer wrote:



 	  Quote: 	
		   



 did you guys try to power up the unit without it being hooked to  

 the ducer first?  or was it hooked to ducer, and would not power up  

 on the initial try?  Alot of instruments don't like to have power  

 to them without the ducer being installed.  If that was the case,  

 and you were impatient and wanted to see what it would do before  

 the ducer was hooked up, you may have toasted a good instrument.



 Don't know for sure if you did or not, just tossing it out there.



 snake



 --------

 DO NOT ARCHIVE

 Leonard Perry aka SNAKE

 Soldotna AK

 Avid &quot;C&quot; / Mk IV

 582 IVO IFA

 Full Lotus 1260

 #1 snake oil salesman since 1-22-2009



 hander outer of humorless darwin awards





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 34520#234520

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

SkySteve

Joined: 16 Dec 2007
Posts: 94
Location: Huntsville, UT

Posted: Fri Mar 13, 2009 7:00 pm Post subject: Re: Fuel Flow Display

The transducer was connected prior to any test or power up.  



I have sent several emails to Northstar requesting help.  I have also listened to the music on their phone line for over an hour, listening to someone continuously telling me how important my phone call is, and how the next available representative will be on the line soon.  No one ever answered their phone.  No one ever responded to any email.



Today, in total frustration, I cut the 5 pin connector off the line and hard wired the transducer to the meter.  Still the same result.  When the transducer is connected to the meter all power is lost.  When the transducer is disconnected from the meter the meter works great.  I am convinced there is a dead short in the transducer.  



I have removed the transducer from the fuel line and am planning on returning the entire unit and will ask for a replacement.

_________________
Steve Wilson
Huntsville, UT
Kitfox Model 1- 85DD
912A / 3 Blade Warp Drive
Convertible Nosewheel & Tailwheel

Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Fri Mar 13, 2009 7:33 pm Post subject: Fuel Flow Display

On Fri, March 13, 2009 7:00 pm, SkySteve wrote:

 	  Quote: 	
		   


	


 	  Quote: 	
		   ...  Still the same result.  When the transducer is connected to

 the meter all power is lost.  When the transducer is disconnected from the meter the

 meter works great.  I am convinced there is a dead short in the transducer.


	


Did you try it with the engine running? Might need to initialize with fuel flow first.



-- 

Paul A. Franz

Registration/Aircraft - N14UW/Merlin GT

Engine/Prop - Rotax 914/NSI CAP

Bellevue WA

425.241.1618 Cell



"If Congress can do whatever in their discretion can be done by

money, and will promote the General Welfare, the Government is no

longer a limited one, possessing enumerated powers, but an

indefinite one, subject to particular exceptions."



--James Madison, letter to Edmund Pendleton, 21 January 1792



There is no distinctly native American criminal class...save Congress



-- Mark Twain

_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

SkySteve

Joined: 16 Dec 2007
Posts: 94
Location: Huntsville, UT

Posted: Fri Mar 13, 2009 7:41 pm Post subject: Re: Fuel Flow Display

I have not run the engine with the fuel flow meter installed.  Others here have stated that their's power up just fine with only the master switch on.

_________________
Steve Wilson
Huntsville, UT
Kitfox Model 1- 85DD
912A / 3 Blade Warp Drive
Convertible Nosewheel & Tailwheel

matronics(at)bob.brennan.
Guest

Posted: Sat Mar 14, 2009 5:59 am Post subject: Fuel Flow Display

On my Jeep Cherokee's "instantaneous fuel mileage" display I can lift my

foot off the pedal and maintain speed and the display goes up to 200 miles

per gallon! Of course that's going downhill... and going up the same hill it

shows 8 mpg...



Sorry Lynn, couldn't resist<g>, sometimes being curious brings out the

smart-ass in me.



But seriously, I have yet to install my rather expensive fuel flow meter in

my 582 KF2 so am watching this thread with interest. So - 10 mph into a 90

mph wind - IAS or GPS? IAS you are going a true 90, GPS probably 80. To me

IAS is the only thing that is important for fuel flow, a 10 mph headwind

only affects how much fuel and time it will take to get where you're goin'.



But more importantly "twist[ing] the throttle back" did what? Lowered the

airspeed? You found a convenient "hill" to maintain airspeed? What was the

gph before?



On my KF2 I hope to find a cruise "sweet spot" with the fuel flow meter. At

or below 65 it tends to mush and needs more throttle, once I get it on

"plane" it speeds up, speeding up further I suspect will suck more fuel. At

some IAS, unique to each plane no doubt, there's a best economy cruise.



Welcome to Saturday morning pedantry, but I know you enjoy the challenge!(?)



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa 



--

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sat Mar 14, 2009 9:03 am Post subject: Fuel Flow Display

Lots of filling measuring draining and heavens knows what, but won't tell

going on there.  Fill, use and refill from known capacity containers that

way you will know exactly what you are replacing...  that quantity is the

quantity used.



Just make sure if you refuel from 2.5 gal containers put as close to 2.5 gal

in each one as you can get.



Noel

 



--

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sat Mar 14, 2009 11:13 am Post subject: Fuel Flow Display

Saturday morning pedantrics are fine, but I was flying this am. : )



I never thought of flying down-hill to get a better reading....if I  

had, I'm sure the "hurry up and dump some fuel overboard...you're  

making fuel" light would have come on. : )



I don't think my airspeed is exactly accurate, but I was showing  

about 90 on it and on the GPS groundspeed...and at about 2000 ft AGL,  

how do I know what the exact wind was? I didn't, but the ground wind  

was 10 mph, 30 miles further back when I departed. At the point where  

I saw 90 by 90, I was showing about 3.1 to 3.2 gph usage. I twisted  

(vernier throttle) the throttle back and saw 2.9 gph usage, and speed  

dropped to about 85  by 85. I was trying to slow enough to just stay  

ahead of my friend's 150 Cessna, and by slowing this small amount,  

the speed dropped, but the gph use really dropped. The tach was  

showing about 2700 at 90 mph, and about 2540 when throttled back..(.I  

think I have too much prop, as the Jab's cruise speed should be  

2750-2950 rpm). I was straight and level at the time. I've read some  

accounts of people getting 2-point something with their Kitfox's, and  

seriously doubted them, but it just shows what throttling back can  

do. I'm happy if I get about  3.8-4.1gph, but if I'm in a hurry to  

get somewhere, I'll open it up more but seeing 4.8-5.0 makes me  

realize how much of a rush I SHOULDN'T be in. Incidentally, on  

takeoff, I'll see 5.8-6.0 gph use, and that's enough to point the  

nose down a bit and twist the throttle back some. : )



The main reason I got the fuel flow gauge was to determine where the  

Bing's needle needs to be for best economy, just like you mentioned,  

Bob. I've been using the EGT's for this purpose, but I think the flow  

meter will be more instantaneous.



By the way, when we got to where we were going, the fuel price was  

$3.26/ gallon for 100 LL, and they had just lowered it from $3.79/ 

gallon.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 610 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying





On Mar 14, 2009, at 9:57 AM, Bob Brennan wrote:



[quote] 

 <matronics(at)bob.brennan.name>



 On my Jeep Cherokee's "instantaneous fuel mileage" display I can  

 lift my

 foot off the pedal and maintain speed and the display goes up to  

 200 miles

 per gallon! Of course that's going downhill... and going up the  

 same hill it

 shows 8 mpg...



 Sorry Lynn, couldn't resist<g>, sometimes being curious brings out the

 smart-ass in me.



 But seriously, I have yet to install my rather expensive fuel flow  

 meter in

 my 582 KF2 so am watching this thread with interest. So - 10 mph  

 into a 90

 mph wind - IAS or GPS? IAS you are going a true 90, GPS probably  

 80. To me

 IAS is the only thing that is important for fuel flow, a 10 mph  

 headwind

 only affects how much fuel and time it will take to get where  

 you're goin'.



 But more importantly "twist[ing] the throttle back" did what?  

 Lowered the

 airspeed? You found a convenient "hill" to maintain airspeed? What  

 was the

 gph before?



 On my KF2 I hope to find a cruise "sweet spot" with the fuel flow  

 meter. At

 or below 65 it tends to mush and needs more throttle, once I get it on

 "plane" it speeds up, speeding up further I suspect will suck more  

 fuel. At

 some IAS, unique to each plane no doubt, there's a best economy  

 cruise.



 Welcome to Saturday morning pedantry, but I know you enjoy the  

 challenge!(?)



 Bob Brennan - N717GB

 ELSA Repairman, inspection rated

 1991 UK Model 2 ELSA Kitfox taildragger

 Rotax 582 with 3 blade prop

 Wrightsville Pa



 --

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

matronics(at)bob.brennan.
Guest

Posted: Sat Mar 14, 2009 2:41 pm Post subject: Fuel Flow Display

According to the Model II POH, with the 65hp 582, fuel consumption at 65mph

is 2.1gph and at 85mph it is 3.7gph; nearly twice as much for an extra

20mph! I have found that I need to maintain around 70mph IAS, at 65 it tends

to "fall off the plane" and lose airspeed quickly. I'm not sure if it's just

my plane or a characteristic of the II but it can be a problem. Seeing the

rating go from 2.1gph to 3.7 within my usable cruise range it makes me want

to see a curve there so I can get the efficiency. 



So I should go out now and install that bloody expensive equipment and get

flying again! We have a disadvantage here in South Central Pa where the

grass strips are either frozen with nasty bumps or melted with mud patches

that'll suck your boots off. And no snow for skis, maybe I should move...



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa



--

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Sat Mar 14, 2009 2:57 pm Post subject: Re: Fuel Flow Display

 	  matronics(at)bob.brennan. wrote: 	
		  According to the Model II POH, with the 65hp 582, fuel consumption at 65mph

is 2.1gph and at 85mph it is 3.7gph; nearly twice as much for an extra

20mph! I have found that I need to maintain around 70mph IAS, at 65 it tends

to "fall off the plane" and lose airspeed quickly. I'm not sure if it's just

my plane or a characteristic of the II but it can be a problem. Seeing the

rating go from 2.1gph to 3.7 within my usable cruise range it makes me want

to see a curve there so I can get the efficiency. 



So I should go out now and install that bloody expensive equipment and get

flying again! We have a disadvantage here in South Central Pa where the

grass strips are either frozen with nasty bumps or melted with mud patches

that'll suck your boots off. And no snow for skis, maybe I should move...



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa



-- 	




Flying my brothers model II and a buddies model I and my Avid C I have not seen anything CLOSE to those numbers.  at 85 it is closer to 5.5- 5.8 GPH.  To get into the low 4s or high 3s I have to pull it back to about 55-60 mph.  I checked this over about 300 hrs on the model II and 30 hrs on the Avid.



The attached pic shows the fuel flow at ~80 IAS and a fuel flow of 5.1

DSC02143.JPG

Description:

Filesize:

273.84 KB

Viewed:

11325 Time(s)

matronics(at)bob.brennan.
Guest

Posted: Sat Mar 14, 2009 3:52 pm Post subject: Fuel Flow Display

Interesting - are those numbers from a stock 582, C box, GCS prop? Empty

weight close to the published numbers in the POH at

http://cfisher.com/kitfox/kitfox2poh.pdf of 440 lbs? Slim and fit pilot? 



Like I said I have yet to install the fuel flow gauge but while I was

training, with 2 aboard of course, I could easily get 4 hours on a full 15

gallons of fuel, with reserve, which is less than 4 gph. I haven't done

accurate measurements as solo pilot but I usually figure around 2.5 to 3.5

gph depending on what I'm doing.



One of the things that I think makes my KF2 slippery is that I have a

horizontal trim tab and *never* use flaps for trim. Do you trim with flaps

(read "induced drag")?



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa



--

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Sat Mar 14, 2009 4:51 pm Post subject: Re: Fuel Flow Display

 	  matronics(at)bob.brennan. wrote: 	
		  Interesting - are those numbers from a stock 582, C box, GCS prop? Empty

weight close to the published numbers in the POH at

http://cfisher.com/kitfox/kitfox2poh.pdf of 440 lbs? Slim and fit pilot? 



Like I said I have yet to install the fuel flow gauge but while I was

training, with 2 aboard of course, I could easily get 4 hours on a full 15

gallons of fuel, with reserve, which is less than 4 gph. I haven't done

accurate measurements as solo pilot but I usually figure around 2.5 to 3.5

gph depending on what I'm doing.



One of the things that I think makes my KF2 slippery is that I have a

horizontal trim tab and *never* use flaps for trim. Do you trim with flaps

(read "induced drag")?



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa



-- 	




negative ghost rider... little thingy below and to the right of the fuel flow is the electric elevator trim indicator lol.

I think part of my issue is that I am towards the forward CG.  I am moving it back to 18" and gonna try that.  Dean Wilson said it will make a huge difference in the flight performance, for the better... now I wonder what would happen if I clipped the wings to 26' and moved the CG to the aft edge of the wing......... sorry, had to put that in there.. I have been good lately and that just aint right for a snake oil salesman

matronics(at)bob.brennan.
Guest

Posted: Sat Mar 14, 2009 5:20 pm Post subject: Fuel Flow Display

I think that our little hand-tweaked aircraft are *very* sensitive to minor

"adjustments". Especially with that high power to weight ratio. That's why

(among other reasons) this forum is so helpful to me, and even in flight I

am forever searching for that magical "sweet spot". Not to diss(respect)

Cessnas, but the 172's I fly do what they do, and they all do it pretty much

the same. Kitfoxes, they're like ladies.... with all due respect  to

Kitfoxes!



Bob Brennan - N717GB

ELSA Repairman, inspection rated

1991 UK Model 2 ELSA Kitfox taildragger

Rotax 582 with 3 blade prop

Wrightsville Pa 



--

propellerdesign(at)tele2.
Guest

Posted: Sun Mar 15, 2009 12:48 am Post subject: Fuel Flow Display

In general, all airplane, speed for minimum fuel flow isn't the same as the 

speed for best range, and non of those speeds is speed stable, you need as 

you say be 5 mph or so higher.

There is a speed called Carson (not Carlson) speed, that is best 

distance/fuel/time speed, about 1,3 times higher then the best range speed.



on a drag curve this is the speed where a line drawn from origo touch the 

curve.



Jan Carlsson

www.jcpropellerdesign.com



---

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Mar 15, 2009 2:26 am Post subject: Fuel Flow Display

Up here, it's just that time of year when the bumps are frozen in the  

morning, but soft in the afternoon. My field slopes about 20 ft  

downhill (according to my altimeter, but at least 10 ft by  

"eyeballing" it), and at the low end the field is really soggy...the  

pond is swollen to cover half the width of the runway there. So I  

only use half the field (half of 1700 ft) for takeoffs and still get  

up in half of that...easily. Landing is no problem, as I just glide  

over the soft part and time it to land after the halfway mark,  

sometimes needing a go-around, but more likely to need a firm  

application of brakes as the pucker factor rises when the far end  

presents itself rather largely. 



So you're saying you've got the "bloody expensive equipment", but  

haven't put it in yet? Better get crackin', Bob, life is short, and  

Sun 'n' Fun is comin' up. Even the Festival of Flight is well within  

your range, I would think.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 610 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying

do not archive



On Mar 14, 2009, at 6:39 PM, Bob Brennan wrote:



 	  Quote: 	
		   

 <matronics(at)bob.brennan.name>



 According to the Model II POH, with the 65hp 582, fuel consumption  

 at 65mph

 is 2.1gph and at 85mph it is 3.7gph; nearly twice as much for an extra

 20mph! I have found that I need to maintain around 70mph IAS, at 65  

 it tends

 to "fall off the plane" and lose airspeed quickly. I'm not sure if  

 it's just

 my plane or a characteristic of the II but it can be a problem.  

 Seeing the

 rating go from 2.1gph to 3.7 within my usable cruise range it makes  

 me want

 to see a curve there so I can get the efficiency.



 So I should go out now and install that bloody expensive equipment  

 and get

 flying again! We have a disadvantage here in South Central Pa where  

 the

 grass strips are either frozen with nasty bumps or melted with mud  

 patches

 that'll suck your boots off. And no snow for skis, maybe I should  

 move...



 Bob Brennan - N717GB

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Mar 15, 2009 8:51 am Post subject: Fuel Flow Display

I took another flight today in dead calm wind conditions, and showed  

2730 rpm, 3.6 gph fuel usage, 3000' altitude, 98 IAS with 103 GPS  

groundspeed. I lowered the rpm to 2680 rpm, 3.4 gph usage (at) 2720',  

and 96 x 100 (air x ground). On the return flight, after 1 hour  

breakfast (slow service), the numbers were:  2740 rpm, 3.7 usage, and  

2500', with speeds at 100 x 107.    After the trip, my GPS showed  

60.2 miles going, and 60.5 miles returning, both taking .6 hours, for  

almost exactly a 100 mph average.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 610 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying

do not archive



On Mar 14, 2009, at 3:11 PM, Lynn Matteson wrote:



[quote] 



 Saturday morning pedantrics are fine, but I was flying this am. : )



 I never thought of flying down-hill to get a better reading....if I  

 had, I'm sure the "hurry up and dump some fuel overboard...you're  

 making fuel" light would have come on. : )



 I don't think my airspeed is exactly accurate, but I was showing  

 about 90 on it and on the GPS groundspeed...and at about 2000 ft  

 AGL, how do I know what the exact wind was? I didn't, but the  

 ground wind was 10 mph, 30 miles further back when I departed. At  

 the point where I saw 90 by 90, I was showing about 3.1 to 3.2 gph  

 usage. I twisted (vernier throttle) the throttle back and saw 2.9  

 gph usage, and speed dropped to about 85  by 85. I was trying to  

 slow enough to just stay ahead of my friend's 150 Cessna, and by  

 slowing this small amount, the speed dropped, but the gph use  

 really dropped. The tach was showing about 2700 at 90 mph, and  

 about 2540 when throttled back..(.I think I have too much prop, as  

 the Jab's cruise speed should be 2750-2950 rpm). I was straight and  

 level at the time. I've read some accounts of people getting 2- 

 point something with their Kitfox's, and seriously doubted them,  

 but it just shows what throttling back can do. I'm happy if I get  

 about  3.8-4.1gph, but if I'm in a hurry to get somewhere, I'll  

 open it up more but seeing 4.8-5.0 makes me realize how much of a  

 rush I SHOULDN'T be in. Incidentally, on takeoff, I'll see 5.8-6.0  

 gph use, and that's enough to point the nose down a bit and twist  

 the throttle back some. : )



 The main reason I got the fuel flow gauge was to determine where  

 the Bing's needle needs to be for best economy, just like you  

 mentioned, Bob. I've been using the EGT's for this purpose, but I  

 think the flow meter will be more instantaneous.



 By the way, when we got to where we were going, the fuel price was  

 $3.26/ gallon for 100 LL, and they had just lowered it from $3.79/ 

 gallon.



 Lynn Matteson

 Kitfox IV Speedster, taildragger

 Jabiru 2200, #2062, 610 hrs

 Sensenich 62x46

 Electroair direct-fire ignition system

 Status: flying





 On Mar 14, 2009, at 9:57 AM, Bob Brennan wrote:



> 

> <matronics(at)bob.brennan.name>

>

> On my Jeep Cherokee's "instantaneous fuel mileage" display I can  

> lift my

> foot off the pedal and maintain speed and the display goes up to  

> 200 miles

> per gallon! Of course that's going downhill... and going up the  

> same hill it

> shows 8 mpg...

>

> Sorry Lynn, couldn't resist<g>, sometimes being curious brings out  

> the

> smart-ass in me.

>

> But seriously, I have yet to install my rather expensive fuel flow  

> meter in

> my 582 KF2 so am watching this thread with interest. So - 10 mph  

> into a 90

> mph wind - IAS or GPS? IAS you are going a true 90, GPS probably  

> 80. To me

> IAS is the only thing that is important for fuel flow, a 10 mph  

> headwind

> only affects how much fuel and time it will take to get where  

> you're goin'.

>

> But more importantly "twist[ing] the throttle back" did what?  

> Lowered the

> airspeed? You found a convenient "hill" to maintain airspeed? What  

> was the

> gph before?

>

> On my KF2 I hope to find a cruise "sweet spot" with the fuel flow  

> meter. At

> or below 65 it tends to mush and needs more throttle, once I get  

> it on

> "plane" it speeds up, speeding up further I suspect will suck more  

> fuel. At

> some IAS, unique to each plane no doubt, there's a best economy  

> cruise.

>

> Welcome to Saturday morning pedantry, but I know you enjoy the  

> challenge!(?)

>

> Bob Brennan - N717GB

> ELSA Repairman, inspection rated

> 1991 UK Model 2 ELSA Kitfox taildragger

> Rotax 582 with 3 blade prop

> Wrightsville Pa

>

> --

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Wed Apr 08, 2009 10:54 am Post subject: Re: Fuel Flow Display

for anyone intersted in these units, here is a site that has them for $116.95 alot less than I paid for mine a couple years ago.



http://www.roguewavemarine.com/store/northstar-fuel-210-f210-pr-12173.html

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Wed Apr 08, 2009 12:01 pm Post subject: Re: Fuel Flow Display

Fuel flow  117 $ here  I got mine about 3 years ago from them and got it overnight to Canada . 



http://www.boatersland.com/f210.html

Good place to do business with

_________________
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SkySteve

Joined: 16 Dec 2007
Posts: 94
Location: Huntsville, UT

Posted: Wed Apr 08, 2009 1:00 pm Post subject: Re: Fuel Flow Display

It turned out that mine DID have a direct short in the transducer.  I sent it back to Navico (the mfg or importer) in Tulsa, OK and they say they are going to replace it.  However, they are out of stock until sometime between April 15-30. Waiting . . . . .

_________________
Steve Wilson
Huntsville, UT
Kitfox Model 1- 85DD
912A / 3 Blade Warp Drive
Convertible Nosewheel & Tailwheel

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