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  #31  
Old 10-10-2022, 07:57 PM
pilotmansam pilotmansam is offline
 
Join Date: Apr 2011
Location: Newberry, SC
Posts: 89
Default This is what I am getting

Since I was the OP and was challenged to post my own numbers...
Going back to my original question: What are the "real world" numbers for a 150 HP FP RV6-A with regard to max speed? Here is what I got on a speed run lately: Bear in mind, this is an old "slow build" 6A with the old style pants and a 1400 hour engine (with decent compression). Sensenich metal FP prop with the 2600 rpm red-line.

Full throttle
7500 ft.
TAS = 153 kts 176 mph
CHT = 336 F on # 3
EGT = 1295 F on # 4
RPM = 2534
MP = 23.9 in Hg
OAT = 67 F
FF = 11.5 GPM
GS = 178 MPH
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Sam Hart
Newberry, SC
RV-6A N7228Z
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  #32  
Old 10-10-2022, 08:40 PM
catmandu's Avatar
catmandu catmandu is offline
 
Join Date: Dec 2005
Location: Sierra Nevada
Posts: 1,114
Default

You caught my eye with RV6-A and 1400 hour engine.

I just sold a similarly old plane with that same old designation on the data plate and almost the same time since new engine.

I did a speed run not too long ago, but did not get all the data points you did.

O320-E2A with 9:1 pistons so per @Mahlon 164hp
Sensenich FP metal prop
Sam James wheel pants
One Slick mag, One PMAG
2550 RPM on the throttle
Leaned to slightly LOP
8500 ft. indicated altitude
Indicated TAS = 160 kts
RPM = 2550
FF = 7.5 GPH
GS = 159.5 kts per four point GPS
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Sierra Nevada
RV-6A bought flying SOLD
Super-8 bought flying

Last edited by catmandu : 10-11-2022 at 07:07 AM.
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  #33  
Old 10-10-2022, 10:16 PM
blaplante blaplante is offline
 
Join Date: Jan 2010
Location: Southern California
Posts: 556
Default

Quote:
Originally Posted by pilotmansam View Post
Since I was the OP and was challenged to post my own numbers...
Going back to my original question: What are the "real world" numbers for a 150 HP FP RV6-A with regard to max speed? Here is what I got on a speed run lately: Bear in mind, this is an old "slow build" 6A with the old style pants and a 1400 hour engine (with decent compression). Sensenich metal FP prop with the 2600 rpm red-line.

Full throttle
7500 ft.
TAS = 153 kts 176 mph
CHT = 336 F on # 3
EGT = 1295 F on # 4
RPM = 2534
MP = 23.9 in Hg
OAT = 67 F
FF = 11.5 GPM
GS = 178 MPH
For 150 HP, 2534 rpm, and the old wheel pants, this is pretty good. There's a post in here somewhere on how much you can gain upgrading the pants.

Edit: found it https://vansairforce.net/community/s...ighlight=pants
3-5 mph
Call it 4 mph, that gets you to 182 mph

Van's published (for 150 HP) is 185 mph at 75% cruise.
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RV6A in phase 2 as of April 2016
Donation made Dec 2022

Last edited by blaplante : 10-10-2022 at 10:20 PM.
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