Vx, Vy rates

[rjcthree]

I've done some searching and found a little bit on information, but directly not related to RV-9/9A.

For those of you flying, can you provide:
Vx and climb rate at solo/light weight
Vy and climb rate at solo/light weight
An estimate of what that solo/light weight is
Your engine (HP) and prop combination

From this we should be able to generate a deck angle for fuel flows, and I can put estimates into my program schedule for my prelim POH . I'll summarize and report back for future travellers. Even partial information would help. Either response here or IM works.

Thanks in advance. Rick

[flyboy1963]

Great info to see,
so far, I'd say not a lot of replies as a good chunk of folks don't have real hard data except for the initial test flight or two...you just never get around to correcting for temp, and repeating at all different weights and loading ( I suppose most just test at gross???)
Once you see that the -9 climbs at this or that IAS, that's as far as most of us go. More elusive even are takeoff & landing DISTANCES!

I'll dig mine up and send to you.
thx for doing this!

[MS19087]

This was a starting point i used on my RV-9A and adjusted after Phase 1 testing.

Configuration:
IO-320 (165HP)
F/P Prop

Your numbers must be verified during Phase 1 testing:

VNE Never Exceed Speed 182 kts
VNO Maximum Structural Cruising Speed 156 kts
VA Maneuvering Speed 102 kts
VFE Maximum Flap Extended Speed 78 kts
Vy Best Rate of Climb 81 kts
Vx Best Angle of Climb 70 kts
Vs Stall Speed, Clean 50 kts
Vso Stall Speed, Landing Configuration 43 kts

[JohnInReno]

I was going to post the link to the CAFE report on Van's 9A, but the links all return a 403 error:

http://cafe.foundation/v2/research_aprs.php

My numbers are very similar to Mark's once I found the leak in the pitot/static system.

[ArVeeNiner]

Originally Posted by JohnInReno

I was going to post the link to the CAFE report on Van's 9A, but the links all return a 403 error:

http://cafe.foundation/v2/research_aprs.php

My numbers are very similar to Mark's once I found the leak in the pitot/static system.

I have a PDF of this report. I can email a copy to anybody who wants it.

[Mark C.]

Kelly, I would like to see it. Thanks, Mark C.

mjcoplon@te.com

[Hornet2008]

Yes, a copy please. Thanks Mark
phuish@bigpond.com

[FredMagare]

If it is not too much trouble, Sir: Frederic.magare "at" gmail.com

Thank you for your time and consideration.

[rzbill]

Originally Posted by rjcthree

From this we should be able to generate a deck angle for fuel flows

I'm curious what this means, could you expand on it a little?

[airguy]

I would like a copy of that report also please - greg dot niehues at ngsgi dot com.

Originally Posted by rzbill

I'm curious what this means, could you expand on it a little?

I think he's talking about testing the fuel flows on the ground before first flight, making sure the flow is adequate with high nose-up angles where the fuel is pumped "uphill" to the engine.