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  #1  
Old 02-24-2021, 07:53 AM
Freddyboy Freddyboy is offline
 
Join Date: Feb 2021
Location: Fort White Fl
Posts: 2
Default Broken short leg RV4 engine mount help!

I was looking for advice from someone who had a “short” leg mount and has installed the “long” leg mount and gear. Van told me it could be 6 months or longer to get the new mount and gear. Does the new mount match up with old bolt holes? Thanks for any help!
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  #2  
Old 02-24-2021, 07:55 AM
00Dan 00Dan is offline
 
Join Date: Nov 2016
Location: Atlanta, GA
Posts: 184
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Are you sure your current mount is beyond repair? As another short leg -4 owner who is in the process of pulling my mount for crack repair (hope it have it off today) everything I’ve seen is that the long leg change is quite involved.
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  #3  
Old 02-24-2021, 08:15 AM
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D Weisgerber D Weisgerber is offline
 
Join Date: Sep 2019
Location: Ionia Michigan
Posts: 262
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I just read the newest Kitplanes online last night. There was an article by Paul Dye about repairing an RV6 engine mount.
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first flight May 2, 1997
RV8 #83830 done.
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  #4  
Old 02-24-2021, 10:36 AM
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Ironflight Ironflight is offline
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Location: Dayton, NV
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I would definitely check with Russ McCutcheon - he’s a marvel at this stuff, and probably built your mount in the first place....

Paul
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RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
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  #5  
Old 02-24-2021, 06:55 PM
Freddyboy Freddyboy is offline
 
Join Date: Feb 2021
Location: Fort White Fl
Posts: 2
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Thanks Paul I did talk with Russ (great guy) he detailed the history of how Van’s gave the engine mount business to his predecessor because of the quality of the build. He said if the mount was repairable it would be $1200. He recommended to go with a new mount and gear, citing lower landing and takeoff speeds due to the higher AOA the longer gear legs provide plus higher resale value. My neighbor recommended checking with the F1 Rocket crowd to see if anyone that converted a 4 and had a mount for sale. I guess Russ has the only jig to make up the newer long leg mount.
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  #6  
Old 03-25-2021, 12:50 PM
Fly2eat Fly2eat is offline
 
Join Date: Nov 2007
Location: Poplar Grove, IL (C77)
Posts: 65
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Quote:
Originally Posted by Freddyboy View Post
I was looking for advice from someone who had a “short” leg mount and has installed the “long” leg mount and gear. Van told me it could be 6 months or longer to get the new mount and gear. Does the new mount match up with old bolt holes? Thanks for any help!
The long leg mount does not match the center firewall holes. About an 1" or more difference. I swapped my short mount for the long one and had to re-do the firewall and new center mount pads. I still have the short mount and gear legs - like new, never been flown although they were mounted on the kit.
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RV-8 N65KJ "Fifinella"
Building RV-4 #2593
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603-491-4175
ldjeffries@gmail.com
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  #7  
Old 03-26-2021, 07:55 AM
theduff theduff is offline
 
Join Date: Jan 2012
Location: Fallbrook Calif.
Posts: 343
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Any idea how much heavier the long gear leg and motor mount are ?
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  #8  
Old 03-30-2021, 07:26 AM
Fly2eat Fly2eat is offline
 
Join Date: Nov 2007
Location: Poplar Grove, IL (C77)
Posts: 65
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Negligible!
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L. D. Jeffries
RV-8 N65KJ "Fifinella"
Building RV-4 #2593
Poplar Grove, IL (C77)
603-491-4175
ldjeffries@gmail.com
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  #9  
Old 03-30-2021, 01:40 PM
Little Al Little Al is offline
 
Join Date: Sep 2014
Location: Osage, Iowa
Posts: 23
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How bad is your engine mount do you have pics? Where are you located? These mounts are 4130 chomoly and very easly repairable. I have cut out rusted, bent, and totally rebuilt Bell 47 helicopter center frames. There is not much to a RV engine mount comparatively speaking. Maybe I can help $1200 seams excessive
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  #10  
Old 03-31-2021, 02:44 AM
131RB 131RB is offline
 
Join Date: May 2009
Location: Colorado
Posts: 312
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As someone who has done the swap I will say there are many things that change when you do the swap. Its not as simple as remove one and install the other. The wheel pants are at a different angle, your intersection fairings wont work gear leg fairings will have to be redone. If you are lucky everything will jell with your cowl and baffles. Its totally doable just want to say you could be going down a path you might not like. If it were me I would find a local shop with a good welder and look into getting it repaired. Probably a lot less expense and a lot quicker.
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