Tail heavy.

[Dayton Murdock]

Is it possible that your airplane has the polyester cowl and wheel pants? Can you post some pictures of your -4

[Peter Grylls]

This is what she looks like.

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

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

[PeterP]

Hi Peter, just wondering if your new bird still has the numbers on the side or back in VH.

Cheers Peter

[Peter Grylls]

Originally Posted by PeterP

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?

[PeterP]

Hi Peter sent you a PM

[F1R]

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.

[rocketbob]

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.

[theduff]

Originally Posted by Sky Designs

G’day 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: You’ll 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. I’m 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 : It’s noticeably spongier than the steel one but has no bad habits or adverse handling characteristics, plus it polishes out to a beautiful luster and doesn’t corode. Looks almost like chrome.

[flyinggreg1]

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