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Short field landings VP prop

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william(at)wbliss.co.uk
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Posted: Sun Jul 08, 2012 2:25 pm Post subject: Short field landings VP prop

I am wondering about the length of strip I intend to use for a mono 

classic (to be converted to tailwheel). 450yards - slight uphill. The 

figures look marginal.



Does a variable pitch prop have any slowing affect when fully fine and 

idling?



William Bliss

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rlborger(at)mac.com
Guest

Posted: Sun Jul 08, 2012 2:43 pm Post subject: Short field landings VP prop

William,



Yes, a VP prop has noticeable slowing effect when fully fine and idling.  If I were dead stick with idling engine and looking to be short on the landing spot, I'd run the pitch to coarse for a bit more float to try and make the spot.  In my case, I'd be able to feather the prop for even better glide performance.



In your case, you will have to do some testing on another (suitably longer) field to determine how to takeoff and land in your available 450 yards.



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On Jul 8, 2012, at 5:24 PM, William Bliss wrote:






I am wondering about the length of strip I intend to use for a mono classic (to be converted to tailwheel). 450yards - slight uphill. The figures look marginal.



Does a variable pitch prop have any slowing affect when fully fine and idling?



William Bliss

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davidjoyce(at)doctors.org
Guest

Posted: Mon Jul 09, 2012 12:01 am Post subject: Short field landings VP prop

William, As long as the approaches are good (notresses or 

high fences to clear) 450 yds should be generally fine, 

although will need some thought if wind requires you to 

land downhill. Once on the ground you need not much more 

han 100 yds.There is a noticeable difference in the float 

and ground run between fine & coarse prop settings. 

 However  would certainly not recommend a strip that short 

to learn on. Get thoroughly comfortable somewhere else 

first. Happy landings, David Joyce, G-XSDJ



On Sun, 08 Jul 2012 23:24:09 +0100

  William Bliss <william(at)wbliss.co.uk> wrote:

 	  Quote: 	
		   

<william(at)wbliss.co.uk>

 

 I am wondering about the length of strip I intend to use 

for a mono classic (to be converted to tailwheel). 

450yards - slight uphill. The figures look marginal.

 

 Does a variable pitch prop have any slowing affect when 

fully fine and idling?

 

 William Bliss

 

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pete(at)lawless.info
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Posted: Mon Jul 09, 2012 12:01 am Post subject: Short field landings VP prop

Hi William



I operate a 80hp mono off a 550 metre strip slightly humped.  My prop is an

NSI with just a simple pitch control (ie no constant speed unit).



In full fine the 'slowing effect' is dramatic.  Apart from the fact the

aeroplane will descend at 120 kts indicated with the VSI on the stops at

2000 fpm, the effect on the float after round out is very noticeable.



The only time our strip feels short is on a hot day at max weight with cross

wind, then I do think another 20 hp would be good to have.  Although in

practice you are at 50 feet over the far hedge.



Why not try the aeroplane as a mono?  They are great and the ground handling

is not scary if you get some training.



Regards



Pete



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