VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 06-10-2021, 01:01 PM
FireMedic_2009 FireMedic_2009 is offline
 
Join Date: Nov 2016
Location: Tampa, FL
Posts: 222
Default Prop ground clearance for RV3

What should the prop ground clearance be for an RV3? I have a 68 inch prop. The clearance is 7-3/4Ē in level flight.

Also to minimize a prop strike from a hard landing how would I stiffen the gear legs?

Thanks
__________________
RV-6A IO-320 FP sold
RV3B O-320 160hp
Donated 2018 and continue annually
Reply With Quote
  #2  
Old 06-10-2021, 03:14 PM
FinnFlyer FinnFlyer is offline
 
Join Date: Aug 2018
Location: Bell, FL
Posts: 545
Default

I fly a 72" prop on my RV-3B. 14" clearance with tail down.

Even though I do "wheel landings" they are more like tail nearly down.

If you fly it onto the runway then wheel landings shouldn't be hard. Hard landings are more common with tail down, dropping when stalled too far above runway.

Finn
__________________
N214FL RV-4 Mazda 13B Renesis First flight 20 Feb 2021
N46AZ RV3-B Mazda 13B EFI -- Bought -- Flying
N993FL RV-3A Mazda 13B NA 575 hours
Reply With Quote
  #3  
Old 06-10-2021, 05:18 PM
rv6cardinal rv6cardinal is offline
 
Join Date: Jun 2016
Location: calico rock ar
Posts: 16
Default

I was a little surprised how thin the wall of the landing gear was on the early -6 mount. I understand the -7 mounts are beefed up a little though I am not sure where. I had planned earlier to make my 3rd trip to Johnson Creek on the Memorial Day weekend with a niece who just got her private license and bought a -9a. We decided at the last minute to postpone that trip due to some enroute weather. So glad this didnít happen out there or somewhere in between. (Assuming it was already cracked.). Also that the gear did not collapse on landing. Fortunately the air was calm and the landing was a greaser, which does not always happen for me. The older I get the more I believe in guardian angels.
Reply With Quote
  #4  
Old 06-11-2021, 08:54 AM
FireMedic_2009 FireMedic_2009 is offline
 
Join Date: Nov 2016
Location: Tampa, FL
Posts: 222
Default Previous post

I’m not sure the relevance of post #3 has to do with this thread
__________________
RV-6A IO-320 FP sold
RV3B O-320 160hp
Donated 2018 and continue annually

Last edited by FireMedic_2009 : 06-11-2021 at 09:59 AM.
Reply With Quote
  #5  
Old 06-11-2021, 09:16 AM
00Dan 00Dan is offline
 
Join Date: Nov 2016
Location: Atlanta, GA
Posts: 183
Default

Quote:
Originally Posted by FireMedic_2009 View Post
Iím sure the relevance of post #3 has to do with this thread
There was another thread started about the same time as this one talking about a broken RV-6 engine mount. He just clicked on the wrong thread from the new post listings.

Back on topic: on the short leg RV-4s the maximum recommended prop diameter is 70Ē. Iím not sure how much difference there is between those legs and the -3, but it could give you a point of reference.
Reply With Quote
  #6  
Old 06-11-2021, 10:11 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,875
Default

A friend with an RV-3 told me that level, with a 72" prop, he had 5" clearance.

Dave
Reply With Quote
  #7  
Old 06-11-2021, 11:09 AM
FinnFlyer FinnFlyer is offline
 
Join Date: Aug 2018
Location: Bell, FL
Posts: 545
Default

Daren, looking at your other thread about landing the RV-3 it seems you've solved it and probably won't have a problem with a 72" prop, although 70" would be safer and certainly 68" is fine.

Finn
__________________
N214FL RV-4 Mazda 13B Renesis First flight 20 Feb 2021
N46AZ RV3-B Mazda 13B EFI -- Bought -- Flying
N993FL RV-3A Mazda 13B NA 575 hours
Reply With Quote
  #8  
Old 06-11-2021, 09:11 PM
rmarshall234 rmarshall234 is offline
 
Join Date: Jun 2008
Location: San Diego, CA
Posts: 240
Default

Maybe somebody can check me on this but I seem to recall that aircraft certification requires 9" of prop clearance on the ground for a TW airplane and 7" for a nosedragger. Seems like a good baseline if you're concerned about clearance.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 07:14 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.