---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Fri 10/28/05: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:02 AM - Prop Clearance (Steve Sampson) 2. 06:37 PM - Re: Prop Clearance (rob ray) 3. 06:51 PM - Re: Prop Clearance (CBRxxDRV@aol.com) ________________________________ Message 1 _____________________________________ Time: 10:02:28 AM PST US From: "Steve Sampson" Subject: RV4-List: Prop Clearance --> RV4-List message posted by: "Steve Sampson" I am just wonderig how much of an issue the RV-4 has with pop ground clearance. Since I am building it new it will have the longer gear legs. My plan is to use a 2 blade constant speed MT with an IO-320. It is 72" dia. (I could go to the 3 blade which would gain me 1/2" since it is 71" dia. but would rather not.) I notice the FP from Sensenich are all 70" for this application. My question: Is the clearance issue so critical that gaining the extra 1/2" is worthwhile. The wood/glass blades of an MT are not as 'wear' resistant as a metal prop. Thoughts? Steve Steve RV4 No.4478 PA18 G-BVMI RV-9A G-IINI (sold) ________________________________ Message 2 _____________________________________ Time: 06:37:12 PM PST US From: rob ray Subject: Re: RV4-List: Prop Clearance --> RV4-List message posted by: rob ray Steve, With 7 RV4 buddies and all different combinations of props, I can tell you the following. The 72" Hartzell on short gear is fine for most applications. With the long gear 72" props have excellent clearance although forward visibility on the ground is reduced compared to short gear. I have a 68" prop on short gear and have had no problems in off field landings. I also have extensively flown a 180 C/S 72" Hartzell on short gear off airport with no problems either, just more prop grass stains. Long gear with the 72" MT should be outstanding. Rob Ray Steve Sampson wrote: --> RV4-List message posted by: "Steve Sampson" I am just wonderig how much of an issue the RV-4 has with pop ground clearance. Since I am building it new it will have the longer gear legs. My plan is to use a 2 blade constant speed MT with an IO-320. It is 72" dia. (I could go to the 3 blade which would gain me 1/2" since it is 71" dia. but would rather not.) I notice the FP from Sensenich are all 70" for this application. My question: Is the clearance issue so critical that gaining the extra 1/2" is worthwhile. The wood/glass blades of an MT are not as 'wear' resistant as a metal prop. Thoughts? Steve Steve RV4 No.4478 PA18 G-BVMI RV-9A G-IINI (sold) --------------------------------- ________________________________ Message 3 _____________________________________ Time: 06:51:33 PM PST US From: CBRxxDRV@aol.com Subject: Re: RV4-List: Prop Clearance --> RV4-List message posted by: CBRxxDRV@aol.com In a message dated 10/28/2005 1:04:20 PM Eastern Standard Time, SSampson.SLN21@london.edu writes: > I am just wonderig how much of an issue the RV-4 has with pop ground > clearance. Since I am building it new it will have the longer gear legs. My plan is > to use a 2 blade constant speed MT with an IO-320. It is 72" dia. (I could > go to the 3 blade which would gain me 1/2" since it is 71" dia. but would > rather not.) > > I notice the FP from Sensenich are all 70" for this application. > > My question: Is the clearance issue so critical that gaining the extra 1/2" > is worthwhile. The wood/glass blades of an MT are not as 'wear' resistant as > a metal prop. > > Thoughts? Steve > > Steve > Well.......I have a RV-4 with the dreaded short legs :) and a 72" CS. Seems just fine to me. No issue of clearance in the year and a half I have flown it and I have had it on grass as well as asphalt. do not archive RV-4 RV-8 QB .... Fuselage/panel Sal Capra Lakeland, FL My Home Page