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John,
Thanks again. Yeah, I do not know how high I may really go, but I do like the option even if never used. Also, I may have a bit of turbo envy of my fellow builder, Blain Streeter. While he is building an RV 7 with a Eggenfelder Sooooob, he flies a turbo Bonanza. He talks of flying high and fast to his property at Holly Mountain (airpark) in Arkansas (IIRC). He is a versed engineer in both the auto and aviation industry. He uses to do crash analysis for cars and now owns and runs Seamech a company that provides aviation air conditioning units for the likes of Cessna, Eclipse, Mooney etc. He has provided me one of his units for later install in my Velocity.....yeah, just one more thing to add complexity....down the road.
He is also very versed in turbo's. He has been instrumental in some of my system troubleshooting from engine install to electrical. Really a good guy.
Also, as you have mentioned in the past, my Velocity SE (Standard Elite...meaning the Non-XL but with gull wing doors 42 inches across as opposed to 47.5 for the XL Velocity and ten inches shorter. However, the XL would have to use the 20b, me thinks) is likely a bit heavier than your Cozy. The Velocity SE is rated for 160 hp 320 engine (most do use a 360 though). I fully expect to be able to produce at least that much power from my medium street ported rotary, but, since if feels as if I may be building the heaviest Velocity ever, a bit more power seems to be desirable. I could pretend that I am just wanting the intellectual endeavor of possible higher flight, but even with the greater fuel burn, I also like the idea of maybe going faster.
I agree that I am too far into a 13b that I would not wish to even entertain the idea of a 20b for me now. Ok, if one fell out of the air, I may play with it...but barring that....uh, no.
This will probably be the only airplane I will ever build (even though I really like the build process...I also really want to fly and figure I will have years of tweaking fun once/if I ever get it flying reliably) so I kinda want to make it as much the plane I have always dreamed of as I can.
Thanks for taking some of the arrows John.
All the best,
Chris Barber
Houston, GSOT
________________________________________
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of John Slade [jslade@canardaviation.com]
Sent: Thursday, March 18, 2010 7:02 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: [FlyRolytary] Re: TurboConsiderations....careful, its long
Chris / Dave
Fair enough. A fierce discussion is good for the soul. I just felt that
Dave's rant needed a response.
>I still like the idea of a turbo so, if I ever do fly <sigh>, I can
get higher, should I choose.
I know you're fairly entrenched in the 13B approach, but for the sake of
discussion, I'm not sure that's a valid reason.
How high do you want to go? I think Tracy's been over 15k with an NA
13B. I'd be willing to bet that a Velocity with an NA 20B could get well
over 18k without a problem. I admit that it's nice to push the throttle
forward at 12k and climb at 1500 fpm to get over some weather, but an NA
20B would probably do quite well at those altitudes too. I'd be
interested to hear from a 20b flier on that.
Regarding flying at altitude in general, I can't go over 18k unless I
get an IFR rating. I prefer to travel at around 12k (with ox). I ran out
of oxygen on my last long flight and came down to 8k for the last leg.
Replenishing your O2 can be a pain, which is one reason I don't go so
high. I guess I should carry a spare tank. The only place around here
that'll fill my tank is at Boca, and they want $90 to do it. I take it
to the local welding store and get it filled for $13 (just don't tell
them its for breathing). You can buy a fitting from Mountainair (good
place to get the entire system) to hook up to a welding bottle. The
local welding store will see you a full bottle for $200 and fill it for
$25 or so.
Just a few thoughts for you as you move onward....
John Slade
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