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  #21  
Old 01-06-2019, 08:06 AM
Dayton Murdock's Avatar
Dayton Murdock Dayton Murdock is offline
 
Join Date: Jan 2005
Location: Carson City NV
Posts: 533
Default

Is it possible that your airplane has the polyester cowl and wheel pants? Can you post some pictures of your -4
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VAF#408 RV4 N359DM Flying 985 hrs. 8/15/18
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  #22  
Old 01-06-2019, 01:45 PM
Peter Grylls Peter Grylls is offline
 
Join Date: Oct 2018
Location: Eaglehawk, Australia
Posts: 10
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This is what she looks like.

http://www.airport-data.com/aircraft...001401827.html

http://www.airport-data.com/aircraft/19-7376.html

Last edited by Peter Grylls : 01-06-2019 at 02:44 PM. Reason: additional info
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  #23  
Old 01-06-2019, 03:52 PM
PeterP PeterP is offline
 
Join Date: Feb 2011
Location: Ocean Grove Victoria Australia
Posts: 24
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Hi Peter, just wondering if your new bird still has the numbers on the side or back in VH.

Cheers Peter
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  #24  
Old 01-07-2019, 12:08 AM
Peter Grylls Peter Grylls is offline
 
Join Date: Oct 2018
Location: Eaglehawk, Australia
Posts: 10
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Quote:
Originally Posted by PeterP View Post
Hi Peter, just wondering if your new bird still has the numbers on the side or back in VH.

Cheers Peter
It was formerly MRV. I am taking a punt that you used to own it?
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  #25  
Old 01-07-2019, 02:48 AM
PeterP PeterP is offline
 
Join Date: Feb 2011
Location: Ocean Grove Victoria Australia
Posts: 24
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Hi Peter sent you a PM
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  #26  
Old 01-08-2019, 12:06 PM
F1R F1R is offline
 
Join Date: Nov 2010
Location: ____
Posts: 643
Default Do you have an Auto Pilot pitch servo?

A lot of the Auto Pilot servos are quite hefty. A really easy method to cure an AFT C of G issue is to remove the tail mounted AP servo, and the tail cone mounted ELT while you are back there.

Depending on what your chosen ELT is they can be main spar mounted , or even farther ahead of the C of G.

Along with the above items, your battery and perhaps a Landol ring or plain flywheel ring weight as Dayton and others have suggested are likely the easiest moves with the best effect.

Last edited by F1R : 01-08-2019 at 12:42 PM.
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  #27  
Old 01-08-2019, 01:22 PM
rocketbob's Avatar
rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,111
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My friend Jim Winings (RIP) fastback RV-4 which I recently sold weighed 918 empty. 180/WW 200RV. Every effort was made to save weight, including the use of titanium hardware.
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N55BC RV-6 borrowed, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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  #28  
Old 01-09-2019, 12:19 PM
theduff theduff is offline
 
Join Date: Jan 2012
Location: Fallbrook Calif.
Posts: 196
Thumbs up Aft CG

Quote:
Originally Posted by Sky Designs View Post
Gíday Peter, you can add weight up front or you can remove weight from the back.

A quick and relatively easy way to remove one pound from the back of your bird is to replace your steel tailwheel spring with a Sky Designs titanium tailwheel spring. Go to: https://www.skydesigns.aero/titanium-tailspring

Given that the only item further aft than the tailwheel spring is the tailwheel itself, it is the second-most effective way to move your CG forward.

BTW: Youíll want to keep your old steel tailspring as it can be used for self-defense in case of a zombie apocalypse. 😉
I have a one off sliding canopy on my 4 along with electric flaps motor repurposed from a Cessna so Aft CG has always been a concern to me. I changed engines to an injected 360 from a light 320 still with the wood prop switched to the Earth X battery and recently added the light weight tail wheel and the above mentioned titanium tail wheel spring. Iím right at 1000 Lbs empty but most importantly with minimum fuel I can put 210 lbs in the passenger seat and aft baggage and still be within the aft CG limit.
Pirep on the tailwheel spring : Itís noticeably spongier than the steel one but has no bad habits or adverse handling characteristics, plus it polishes out to a beautiful luster and doesnít corode. Looks almost like chrome.
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  #29  
Old 01-14-2019, 09:28 AM
flyinggreg1 flyinggreg1 is offline
 
Join Date: Sep 2018
Location: Hortonville
Posts: 2
Default

I see you have a tailwheel pant on there. Take it off and clean inside.
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