Pics of 68 extra 300, need help finding CG ele conversion
 

Goldberg extra 300 90 size? 68 inch, kit?
Kind of a wack and slash, Was gonna put a g2300 in this bird,but decided to put some ele in instead 41/50 500 kv 1800watts, 100amp esc,5s/5000,14x10 prop.
seems the cg is around 5 1/2 from leading edge with the setup. 8 1/2 pounds finished.

Does any1 know the correct cg or good guess. Prop? think I,m gonna get 16x8
Huge thanks
cheers

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

little ugly but whatever

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

more

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

I searched the forums and google and cannot find the cg. I called dad and he said try 1/3 of the wings width. the width is 16 inches so it looks like I,m real close (5.33).
Any1 heard of that before?
thanks
cheers

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

I always start at 30% MAC on models with unknown CG markings. Some people use 25% as a starting point.

I use this webpage as reference:

http://www.airfieldmodels.com/inform...amic_chord.htm

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

Blasfomey!!!!!!!!! Unholy. !!! Actually, pretty cool. But I think your buddies will catch on that the (OS 90) sticker is bogus sooner or later. On the CG thing. You're right on the mark !!! Let us know how it flies !! (With Pics)

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

that looks like a carl goldberg extra 300 kit.;)

http://www.carlgoldbergproducts.com/.../gbga0055.html

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

Thanks for the info guys. Went to the local riders looking for a electric style 16x8 prop. Guy there laughed and said he had not seen anyone flying anything electric that big yet.
Is this the prop I need?
little confused on this whole electric vs gas prop thing. I know the other local shop has tons of nitro style props. Should I get a nitro style from him?
http://www3.towerhobbies.com/cgi-bin...?&I=LXEYG7&P=0
Kinda not liking how they refer to it as thin!
will try to get some vid from the winter fly in on the 23rd
thanks again
cheers

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

5 to 5-3/4 inches back from the leading edge.

http://www.carlgoldbergproducts.com/.../gbga0055.html


I see someone already provided the link.

Great flying plane.

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

Thanks. Had a buddy come over and hold plane,while I nutted it,he said it felt like it would go straight up. 14x10 wood nitro style. prob gonna be way better with 16x8 apc e. Doing the electric conversion was way easy,
cheers

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

mount

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

ya

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

ok

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

pretty old lady,reminds me of a rat rod

RE: Pics of 68 extra 300, need help finding CG ele conversion
 

whatever
cheers