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James Cowl Question

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rv10(at)sinkrate.com
Guest

Posted: Tue Jan 16, 2007 11:16 am Post subject: James Cowl Question

Deems,  

   

What are you using for a spinner for your James Cowl?  

   

-Ben Westfall  

Portland, OR  

#40579 – gas tanks  

       [quote][b]

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Tue Jan 16, 2007 12:28 pm Post subject: James Cowl Question

I ordered a 14" spinner from Aero Composites 

http://www.aerocomposites.com/ , the same place I'm getting my prop from.



Deems Davis # 406

Finishing - ( A Misnomer ! )

http://deemsrv10.com/



Ben Westfall wrote:



 	  Quote: 	
		   Deems,



 What are you using for a spinner for your James Cowl?



 -Ben Westfall



 Portland, OR



 #40579 – gas tanks



*

*

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rvbuilder(at)sausen.net
Guest

Posted: Wed Jan 17, 2007 7:10 am Post subject: James Cowl Question

If you go with a MT prop, you can specify the 14" spinner from MT for no

extra charge.



Michael



--

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rv10builder(at)verizon.ne
Guest

Posted: Wed Jan 17, 2007 10:15 am Post subject: James Cowl Question

In my days researching the Lancair ES (when it was still affordable to buy 

their kit and they didn't add the carbon canopy  ) Aerocomposite was the 

blade of choice. I can understand when one is spending 225K for a composite 

plane that 13K (at the time) was nothing, but for a plane close to half that 

price is 14.4K really that much better in performance, appearance or reason 

one would go this way, than an MT for 7-8K?



Honestly just asking so I know. Not questioning the decision to chose the 

more expensive blade just wondering in my cost cutting if 6K is worth the 

price.. For example, 6K in an engine may produce something to show for the 

difference in price.. what about this blade?

Pascal

---

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Tim(at)MyRV10.com
Guest

Posted: Wed Jan 17, 2007 11:36 am Post subject: James Cowl Question

Pascal,



When it comes to these specialty add-ons and upgrades, the thing

to keep in mind is that the generic, plans-built RV-10, with

only the standard creature comfort add-ons, will be quite a nice

airplane indeed.  There are possible, and even some definite

benefits, depending on your needs or desires, that can be had

by changing props, pistons, cowlings, engines, fuel injection

systems, electrical ignition systems, and things like that.

There is one important thing to keep in mind though, for those

who have any budget worries. In probably most to nearly all of

these cases, the end-product incremental advantage of these

things is an extremely small percentage of the already

nice plane you would have built without those add-ons.



That's in no way knocking those products, as to the people

with them, they may place higher value on those features

than other builders.  Some people like pretty 3-blade props,

some like electronic ignition, and so on.  The chance though,

that you'll actually gain truly *meaningful* measurable

differences in knots, or many other measuring sticks, is really

small.  So for those on tight budgets, you're not losing much

by going with the basics.  That might be blasphemy to those

who truly love the upgrade, but honestly, the value added

is not "necessity"....it's in their personal desire.



For me, the most desirable upgrades were the electronic

ignition and fuel injection, allowing a great running

engine at low fuel flows. The rest was gravy.   The

interesting thing is, I would bet that even if someone

picked the best prop, best cowl, Hi comp pistons, F.I.

and Elect. Ign., and a few more goodies and did them ALL,

they're still talking about owning a plane that flies

probably within 0-10 kts of the other guy, and both

guys will love their planes.



I myself am looking at hearing the results of the cowl tests,

because if those can statistically prove that ALL of the

proposed benefits come true, then I'll consider a cowl

swap at the right time and price in the future...it'll

depend on the actual numbers though, as I've already

determined that I've got plenty enough enjoyment factor

for me. 



So that doesn't answer your question, but just rest assured

that however you build it, you will probably find very

acceptable in the end.



Tim Olson - RV-10 N104CD - Flying

do not archive

Pascal wrote:

[quote] 

 

 In my days researching the Lancair ES (when it was still affordable to 

 buy their kit and they didn't add the carbon canopy  ) Aerocomposite 

 was the blade of choice. I can understand when one is spending 225K for 

 a composite plane that 13K (at the time) was nothing, but for a plane 

 close to half that price is 14.4K really that much better in 

 performance, appearance or reason one would go this way, than an MT for 

 7-8K?

 

 Honestly just asking so I know. Not questioning the decision to chose 

 the more expensive blade just wondering in my cost cutting if 6K is 

 worth the price.. For example, 6K in an engine may produce something to 

 show for the difference in price.. what about this blade?

 Pascal

 ---

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jesse(at)saintaviation.co
Guest

Posted: Wed Jan 17, 2007 5:52 pm Post subject: James Cowl Question

One value of the more expensive prop, of course, is perceived value.  One car is perceived more valuable than another sometimes just because it cost more, not necessarily because it is better.  If you gain performance with the 14.4K prop, I doubt it will be 8K worth (all IMHO).  For that price you could get two Hartzels and have a 4-blade. J I personally have an aversion to composite props, but that’s all I say.  My dad was with an organization in Mali with a Caravan with composite props and they didn’t last worth anything with the sand.  That was a long time ago, but the memory sticks.  So, I would recommend going with the aluminum cheap prop, but that’s just me.  The composite looks cool, but at 2,700rpm and 200mph, you’ll hardly notice.  Oh yeah, and with the aluminum prop you don’t have to do all the pinhole filling and sanding.  That’s enough of a reason in itself. J  

Do not archive.  

Jesse Saint  

Saint Aviation, Inc.  

jesse(at)saintaviation.com  

www.saintaviation.com  

Cell: 352-427-0285  

Fax: 815-377-3694  

  

--

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Wed Jan 17, 2007 7:45 pm Post subject: James Cowl Question

If you go and check the race results for AirVenture cup you will find 

that the winners and top finishers have two things in common. A James 

cowl/plenum, and an Aero Composite Prop.



Deems Davis # 406

Finishing - ( A Misnomer ! )

http://deemsrv10.com/

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