I just bought Venus II ARF from GP and I have a few questions:
I'm going to use O.S 120AX with a stock muffler, what prop should I use? 15x10? 16x8?
Where is the recommended CG point?
For elevator control, are you using two servos or just one? I'm afraid it won't balance well with two servos in the back.
Should I use the links that came with the kit?
Prop: I am using a OS 120 AX on the Venus with a 15x10 prop and it's perfect.
Muffler: What angle are you mounting your engine?
I reccomend horizontally. If you do you will be much better using the Bisson muffler:
[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMKK3&P=Z]Bisson 1.20 AX Pitts Muffler[/link]
If you are mounting engine angled then the stock muffler will work
CG should be right where great planes calls for 6 1/2 inches back from the flat part of wing leading edge.
That is the center section of the leading edge. Venus is a swept wing so be sure you are measuring from the center section.
Elevator servos: Use two elevator servos mounted in the back. The Venus balances perfectly without any added weight with a 120 AX up front if you mount 3 servos in the back (2 elevator and 1 rudder). Use the RX battery to fine tune the balance. I have not had to add lead weights to any of the 4 venus's that i have built.
Links: I use the supplied links for elevator and rudder. For the ailerons I use clevis at the horn and Dubro swivel ball link at the servo
[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD906&P=7]Dubro Swivel Ball Link2-56/4-40 rod[/link]
See my earlier posts for pictures of all of these items.
Also the Venus flys finer with the tank mounted over the CG, but either way should be good. With the servos in the back there is plenty room for the tank over the CG. It's your choice. I posted info on how to do this as well.