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09-19-2014, 02:00 PM
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Join Date: Aug 2012
Location: West Hartford, CT
Posts: 21
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RV-7A 200HP IO360; Fixed Pitch Prop?
Does anyone know of a fixed pitch prop that can be used on a 200 hp IO360-A1B6? Or is it a bad idea not to use a constant speed prop?
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09-19-2014, 02:51 PM
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Join Date: May 2013
Location: Milano Italy
Posts: 78
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Fp prop
I've almost the same engine mine is 200hp A1A , I chois a three blade Catto prop, that has 70" diameter and 74" pitch , not flying yet, I hope to reach good numbers.
FP versus CS prop always is big dibat, on 200 hp most think the best is CS but our plane are Experimental, so ..... Avery one is free to chois
Gooooood luck
Lucio
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09-19-2014, 04:34 PM
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Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
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Get a sensenich prop pitched to 87 inches. Should work just fine. I have a 87 inch pitch on my IO-360 RV 7 .
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09-19-2014, 04:39 PM
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Join Date: May 2012
Location: Ga
Posts: 662
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180hp +
I have a Catto prop made special for the late Bob Axsom. He ran it on his RV6a and it put out some serious HP and it did fine. PM me if you want specific info. Prop is hanging on the wall waiting for a project.
Cj
__________________
Craig
RV-3 Sold
RV-4 Sold
RV-6a Sold
RV-9 IO-360 CS, Built and Flying
Aerostar 600A, Family Hotrod
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09-21-2014, 12:25 PM
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Join Date: Nov 2012
Location: Cincinnati,Ohio KHAO
Posts: 128
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Tartufo Bianco
Lucio, Yes Lycoming 200hp angle valve engines are on some factory airplanes with fixed pitch, I think ...... wait ...your in Milano ... I don't care what prop gets me there, lets go for those truffles. It's the season!!!  
__________________
John R Prince
RV-7 want-a-b
Dues Paid for 20
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09-21-2014, 02:49 PM
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Join Date: May 2013
Location: Milano Italy
Posts: 78
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Quote:
Originally Posted by Flyingleap
Lucio, Yes Lycoming 200hp angle valve engines are on some factory airplanes with fixed pitch, I think ...... wait ...your in Milano ... I don't care what prop gets me there, lets go for those truffles. It's the season!!!  
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Yes Jhon, is the season, Alba is no more than two hours away, did you see there?
I'm not so crazy for white truffle but I know, it's very nice. 
What means RV-7 a-b?  
__________________
Lucio
Milano Italy
Blue-7
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09-21-2014, 03:09 PM
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Join Date: Jul 2007
Location: Cypress, TX
Posts: 526
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Lucio, call or email Craig Catto and speak with him about pitch. Ive got a 68 x 75 on a 185 hp RV8 that I can spin up past 2700 rpm's. I think a 74 pitch may be too low for 200hp
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09-22-2014, 01:02 AM
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Join Date: May 2013
Location: Milano Italy
Posts: 78
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CATTO prop pitch
Brad, thanks for note
your prop is 68x75 mine 70x74 , I don t know if 2" in diameter can make compensation 1" in pitch, in any case When I bought it I asked a prop for high cruise speed , so the answere from Craig CATTO was:
70" diameter x 74" pitch
for IO-360 200hp@2700rpm
Top Speed at target rpm 207-211mph @2750 rpm
4.375" finished Propeller Thickness
Your prop has the same thickness?
How many rpm you have before T/O run?
Lucio
__________________
Lucio
Milano Italy
Blue-7
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09-22-2014, 05:31 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Lucio, the "A" models are tricycle gear. Taildraggers don't have a suffix..e.g. RV-7.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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09-22-2014, 06:12 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by Lucio I-NLCM
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What means RV-7 a-b?  
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"RV-7 want-a-b" is American slang for "want to be" which means he wants to own an RV-7 some day.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
Last edited by N941WR : 09-22-2014 at 06:15 AM.
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