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  #1  
Old 06-20-2022, 08:46 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
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Default Fast RV-10

Many moons ago, I stumbled across a thread where a forum member did a substantial amount of under-cowl and airframe cleanup and had a significantly faster/more efficient airplane than stock.

But I can't find the thread for the life of me.

Does that ring a bell for anyone?
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  #2  
Old 06-21-2022, 08:53 AM
echozulu echozulu is offline
 
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Location: Ocean City, MD
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Default

This post?
https://vansairforce.net/community/s...2&postcount=11
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  #3  
Old 06-21-2022, 09:19 AM
Kyle Boatright Kyle Boatright is offline
 
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Quote:
Originally Posted by echozulu View Post
That thread. Thank you. I wanted another look at the cowl exit fairings he’d built.
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  #4  
Old 06-21-2022, 02:47 PM
AlpineYoda AlpineYoda is offline
 
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Location: Boulder, CO
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Default

Vne has nothing to do with the engine and cowl. If you build something that can "go significantly faster than stock" aren't you running the risk of flutter / structural failure / littering roofs with airplane parts?

My understanding is that a stock RV-10 can achieve Vne probably in level flight, definitely in a dive. Why would you want to "go significantly faster than" that?

Give your plane more power for takeoffs, climb, etc, sure. But increase top speed? You better modify a lot more than just the engine.
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  #5  
Old 06-21-2022, 06:14 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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Quote:
Originally Posted by AlpineYoda View Post
V
My understanding is that a stock RV-10 can achieve Vne probably in level flight, .
Uh, no. Vans numbers for a stock RV10 show max speed at 211 mph (true), 75% cruise at optimum altitude at 200 mph (true), and Vne as 230 mph (true).
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  #6  
Old 06-21-2022, 06:41 PM
rocketman1988 rocketman1988 is online now
 
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Location: Sunman, IN
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Default maybe not a stock -10

A stock -10 probably wont get to those numbers but I can tell you that I typically cruise at about 172-174 KTAS and 200 KTAS can be easily reached in a descent...

Running a 290 hp Barrett EFII engine with CAI...
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  #7  
Old 06-21-2022, 07:16 PM
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Lenny Iszak Lenny Iszak is offline
 
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Location: Palm City, FL
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And that illustrates why reducing drag is more effective than adding ponies, just in case the math isn't convincing enough.
Normal cruise on my RV-10, 173kts TAS, stock 260hp Lycoming D4A5. (see attachment)
Just because you can doesn't mean you have to bust Vne in a descent, anticipate the speed buildup in a descent and power back.

Also be mindful of Vno (yellow arc) in the descent when necessary. (156kts indicated for the -10).

Btw, you don't necessarily have to go fast, reducing drag can save you a bunch of fuel.
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  #8  
Old 06-21-2022, 07:22 PM
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1001001 1001001 is offline
 
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Quote:
Originally Posted by Lenny Iszak View Post
And that illustrates why reducing drag is more effective than adding ponies, just in case the math isn't convincing enough.
Normal cruise on my RV-10, 173kts TAS, stock 260hp Lycoming D4A5. (see attachment)
Just because you can doesn't mean you have to bust Vne in a descent, anticipate the speed buildup in a descent and power back.

Also be mindful of Vno (yellow arc) in the descent when necessary. (156kts indicated for the -10).

Btw, you don't necessarily have to go fast, reducing drag can save you a bunch of fuel.
Do you have a reference of some of the drag reduction mods you have done on your -10? This is pertinent to my interests
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  #9  
Old 06-21-2022, 07:52 PM
Lenny Iszak's Avatar
Lenny Iszak Lenny Iszak is offline
 
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Quote:
Originally Posted by 1001001 View Post
Do you have a reference of some of the drag reduction mods you have done on your -10? This is pertinent to my interests
Haven't done any yet, just planning to. Not exactly stock RV-10 though, it has a James cowl and orange peely paint
All out at 8500ft it does 178kts. Minus about 0.6kts for static port error at that speed.

Lenny
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  #10  
Old 06-22-2022, 03:31 AM
rocketman1988 rocketman1988 is online now
 
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Quote:
Originally Posted by Lenny Iszak View Post
Haven't done any yet, just planning to. Not exactly stock RV-10 though, it has a James cowl and orange peely paint
All out at 8500ft it does 178kts. Minus about 0.6kts for static port error at that speed.

Lenny
You also need to account for the difference in props…
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