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  #11  
Old 09-06-2012, 05:23 PM
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Ettore Ettore is offline
 
Join Date: Jan 2009
Location: Verona, Italy
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Originally Posted by cnpeters View Post
Buon giorno - benvenuti al mondo di Van's Aircraft.
To add to the above comments, the Sam James cowl needs little exterior finishing from the example I saw today - very smooth. But, in looking at speed and temperature data, with and without the Sam James plenum (sold by a different location in Florida), I have truly seen negligible differences. For me, it is a matter of aesthetics, with the SJ cowl much sexier looking, albeit at the price of more work (though I'm not at this stage yet, a builder today told me that the Van's baffle kit is wonderful and fits well with their cowl. With the SJ cowl, there will be many hours more work).
As an aside, there are a dozen or so RV builders in Italy. There is a Luca P not far from you, but don't know him and if he still has his flying RV. Not too far from Verona south of Milano near Lodi is Lucio Castrogiovanni, building an RV-7. I visit him every year - a great guy. Message me if you want his contact information.
Arrivaderci,
Carl
Hi Carl, thank you so much for your kindness.
I know some RV owners here in northern Italy and UK, three of them have the -7 and the fourth has a -9A. They all have standard cowls.
But don't worry, I have plenty of time to think about it, I've just ordered the preview plans.
However, I definitely think I will mount SJ cowl. I love it!

Thanks a lot for your help, ciao!
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  #12  
Old 09-06-2012, 06:35 PM
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hydroguy2 hydroguy2 is offline
 
Join Date: Sep 2006
Location: Townsend, Montana
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Originally Posted by cnpeters View Post
....the Sam James cowl needs little exterior finishing from the example I saw today - very smooth. But, in looking at speed and temperature data, with and without the Sam James plenum (sold by a different location in Florida), I have truly seen negligible differences. For me, it is a matter of aesthetics, with the SJ cowl much sexier looking, albeit at the price of more work....
The James cowl still requires a lot of pin hole filling. I would guess the actual work to fit and prep is equal with the Vans cowl. The Plenum is tougher than straight baffles.

As far as cooling and performance, I will say, cooling can be an issue. But careful sealing and tuning I run as cool as most. Performance I think I am a touch faster than other RV-7's w/parallel valve 360's.
Hard to snap a good pic when doing a full power speed run. I have a 2kt error at this speed so call it 188kts


At cruise speed yesterday I was showing 179KTAS at 8.1gph. (~177actual)

I chose the James Cowl based on looks also. The extended Long Cowl with prop extension is a way to stretch the lines of the sometimes stubby looking side by side RV's. Also chose my paint for the same reason...Longer just looks faster.
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