C/G

[Jonathan]

The model is now completed,  just checked the C/G and it balances level,  on the plan it says " A more rearwards position improves the glide. Previous models I've usually had a slightly nose down.  I don't really want to add any weight to it,  would it be ok as it is?. Was going to have a test glide this morning in the field next to me , guess what it's raining.

[Engine Doctor]

Looks brilliant 👍. If glide is ok i would try as it is on low engine speed just in case it heads up like a homsick angel. Build speed up and trim as required. I think my Answer had the wings packed slightly at the rear due to the engine fitted but this obviously changed the glide charachteristics to not as good as it should have been. The correct engine speed for the airframe will result in a good glide when engine cuts without excessive elevator input .

Good luck .

Edited June 15 by Engine Doctor

[Jonathan]

Still raining here so test glide off until tomorrow 🙄.  Hopefully will not need to put lead up front.  I remember a mate of my Dad's, who built a Aeronca Sedan free fight,  it crashed, there was about 1/2lb of church roof lead glued under the tail 😆 

[Engine Doctor]

yes . Saying says that forward CG they fly badly. Rearward CG they fly once  !😉

[J D 8 - Moderator]

Model looks to have an elevator of sorts. Perhaps more of a trim tab like I have on my Cardinal, it helps if there is a bit of wind and one can put in a bit of down to penetrate into wind and can also be helpful in initial trimming.

Most important with this sort of model is to ensure wing is true with no twist. Pic is of my Cardinal's first flight on its way to a visit to the long grass for that reason despite rudder full right. Good luck.

[Matt Carlton]

A rearward cg can improve the glide but that's mainly a free flight trimming thing to flatten the glide and make the model more sensitive to lift. In your case, you have an elevator so it's not such an issue, your flight pattern isn't likely to be climb/glide in the same way as ff. Better to have a stable, straight glide than worry too much about minimum sink etc. You can trim/shim to fine tune later as you dial it in.