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  #1  
Old 11-27-2017, 01:28 AM
BMW_X6M BMW_X6M is offline
 
Join Date: May 2012
Location: Los Angeles Coast
Posts: 34
Default Catto 2 blade 160 knots TAS with new O320D2G

I have about 15 hours on my new engine from Vans which replaced a rebuilt engine the RV-9A airplane had when I purchased it in July 2012.
Yesterday I think I got the most out of the combination at 8000 feet, 2700 RPM, 160 knots true for the first time in straight and level flight. The engine has been performing well and I have no oil leaks. This engine is also equiped with dual PMAGS.

I also installed the Antisplat oil separater-positive crankcase ventillation and I can report only adding 1/2 quart of oil so far during the break in, and absolutely no oil on the belly. This while running the engine at 7 quarts on the dipstick. This product has several benefits in my opinion. I am very happy so far with the results. It has the bypass check valve also.

I also installed the PlanePower backup alternator on the vacuum pump pad to compliment the primary PlanePower alternator. This was an easy installation and it works perfectly. I can shut down the primary alternator in flight, and the backup takes over automatically and powers the dual Dynon SkyView with GTN650 avionics at a slightly less voltage of 13.6 volts. Iím very happy with this capability and redundancy.
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  #2  
Old 11-27-2017, 04:49 AM
terrykohler terrykohler is offline
 
Join Date: Jan 2005
Posts: 943
Default Sounds Like a Great Setup

On my 2004 build, I paired the O320D1A with the Vans recommended Sensenich prop. It's been a workhorse, but the prop is RPM limited and the mass is such that I can't really get over 2600 RPM except going downhill. Hence I can't develop full HP or get the speed you're capable of. On the other hand, it's still pretty darn good. I need to look into the plane power backup alternator.
Fly safe.
Terry, CFI
RV9A N323TP
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  #3  
Old 11-27-2017, 11:10 AM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,354
Default

160 kts on 160hp is moving on.
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 600+ for all

Simplicity is the art in design.
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  #4  
Old 11-28-2017, 09:13 AM
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titanhank titanhank is offline
 
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 160
Default

And i thought my -6 with 160hp catto 3 blade was slow. I get 160 ktas at 8000ft turning 2670rpms. I guess it is normal.
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Rv-6
0-320
160hp
Catto 3-blade gen 3
Smoke system
1044 lbs
71.63" cg
Panel update in progress
Dynon d180
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  #5  
Old 11-29-2017, 01:21 PM
dlomheim dlomheim is offline
 
Join Date: Sep 2006
Location: (2OK2) OK City, OK
Posts: 342
Default RV-9A top end

Quote:
Originally Posted by BMW_X6M View Post
I have about 15 hours on my new engine from Vans which replaced a rebuilt engine the RV-9A airplane had when I purchased it in July 2012.
Yesterday I think I got the most out of the combination at 8000 feet, 2700 RPM, 160 knots true for the first time in straight and level flight. The engine has been performing well and I have no oil leaks. This engine is also equiped with dual PMAGS.

I also installed the Antisplat oil separater-positive crankcase ventillation and I can report only adding 1/2 quart of oil so far during the break in, and absolutely no oil on the belly. This while running the engine at 7 quarts on the dipstick. This product has several benefits in my opinion. I am very happy so far with the results. It has the bypass check valve also.

I also installed the PlanePower backup alternator on the vacuum pump pad to compliment the primary PlanePower alternator. This was an easy installation and it works perfectly. I can shut down the primary alternator in flight, and the backup takes over automatically and powers the dual Dynon SkyView with GTN650 avionics at a slightly less voltage of 13.6 volts. Iím very happy with this capability and redundancy.
Van's website shows a 9A with 160 hp should top out at 195 mph, so it looks like you still have a little ways to go...

Doug
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  #6  
Old 11-29-2017, 09:46 PM
grubbat's Avatar
grubbat grubbat is offline
 
Join Date: May 2012
Location: Ga
Posts: 509
Default Yep

That's about where I'm at in level flight all in but I'm running ~180hp.
Pmag ignition timed 5deg ATDC so lost some hp there. Got 196 mph TAS level flight once in smooth air and under 1600lbs.

Quote:
Originally Posted by dlomheim View Post
Van's website shows a 9A with 160 hp should top out at 195 mph, so it looks like you still have a little ways to go...

Doug
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RV-3 Sold
RV-6a Sold
RV-9 Built & Flying
Twin Comanche Flying
RV-10 Thinking about it...
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  #7  
Old 11-29-2017, 10:28 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 2,934
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Quote:
Originally Posted by dlomheim View Post
Van's website shows a 9A with 160 hp should top out at 195 mph, so it looks like you still have a little ways to go...

Doug
You'll go faster down low than up high because the engine will generate more power. My -6 will do 175+ knots at 1,000'. It'll do 165-170 at 8,000'.
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2001 RV-6 N46KB
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  #8  
Old 11-30-2017, 12:40 PM
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scottmillhouse scottmillhouse is offline
 
Join Date: Apr 2007
Location: Madison, AL
Posts: 157
Default

A 9A with a 160 HP and constant speed will do 195mph as Van listed. Could do it with my old one after new cylinders but it took awhile and mine was faster at 2650 than 2700 I guess to optimize the CS propeller bite to the thinner air up there at 8000'
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RV-12 #120515, 319RV over 200 hours.
1st flight 12/08/15, flew SNF, Oshkosh, Triple Tree & SERFI in year 1!
RV-9A, 536 hours, sold, RV-7 sold, Kitfox sold
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  #9  
Old 12-09-2017, 05:13 PM
iaw4 iaw4 is offline
 
Join Date: Sep 2015
Location: Los Angeles, ca
Posts: 4
Default realistic cruise speeds?

vans states 162 knots (187mph) cruise at 75%, 8000ft, fixed pitch prop, 160hp engine.

(Q: what RPM setting would this 75% expected to be?)

how many can match these RV-9A speeds with their configuration? (I am guessing the cato prop should be about as fast as the sensenich, right? what are they using when they quote this?)

looking over past posts, 145-150 knots in their config seems more common. I am wondering what builder mistakes could possibly consume 10-20 knots.

/iaw
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  #10  
Old 12-09-2017, 07:42 PM
YellowJacket RV9 YellowJacket RV9 is offline
 
Join Date: Oct 2012
Location: Clearwater, FL / KZPH
Posts: 1,018
Default

Quote:
Originally Posted by iaw4 View Post
vans states 162 knots (187mph) cruise at 75%, 8000ft, fixed pitch prop, 160hp engine.

(Q: what RPM setting would this 75% expected to be?)

how many can match these RV-9A speeds with their configuration? (I am guessing the cato prop should be about as fast as the sensenich, right? what are they using when they quote this?)

looking over past posts, 145-150 knots in their config seems more common. I am wondering what builder mistakes could possibly consume 10-20 knots.

/iaw
I would guess the Catto would be faster than the fixed pitch Sensenich, which is limited to 2600 RPM. I have 150HP, with the recommended Sensenich. I flight plan at 140 KTAS (usually can see 142), although I generally fly above 10k feet where the plane seems to be happiest, even at 55-60% power, and burns ~6GPH. Even when lower than that, I can't get much over 150 KTAS at WOT.

My goal is to gain about 5 knots, and I am slowly working on the free things I can do to get faster, first. I am going to re-check my wheel pant alignment at next annual (ball is perfectly centered, but they could both be off...), and am working on sealing up the canopy and empennage. Am also considering experimenting with cowling exit area, as I think it is way bigger than it needs to be now. Realistically, though, I know I am limited with my prop because of the 2600 RPM limit- it will never be able to develop full rated power with that restriction. A Catto prop is probably in my future at some point. My engine won't do constant speed, but neither will my wallet. Tinkering with other things keeps me busy and happy though.

Chris
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RV-9A - Done(ish) 4/5/16! Flying 4/7/16

Last edited by YellowJacket RV9 : 12-09-2017 at 07:48 PM.
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