After giving headache to all the friends in this great site, I have learned a lot but still need more. My pt electric, my baby, flew it about 6 times with 6 cell nicad 1200 mah and some times with 6 pack 3000 nimh . climbing was slow but better than the thrustmaster. I had to hand launch it all the time because the magnetic mayhem and GD 600 set up takes 8 cell ,so power was marginal with 6 cell.but yesterday even after fully charging the 6 cell nicad, my freind hand launched it ,it flew but it was stalling i stopped using elevator but some guys were running on the feild which prevented me from landing if kept trying but then stalled and crashed.

1- i can repair it but need some help. should i use thin CA or thick or 5 minute epoxy?

2- i will raise the landing gear and make it steerable therefore the rod coming from rudder servo has to run right above the battery box,so, that means i cannot raise the ceiling of the battery box because it will touch the servo rod going to the gear right?
i want to use 8 cell that u can see in the pic, if i put all 8 cells in line that means ill have to move the battery back wall closer to the servos which will have a negative effect on the center of g. right?? so my only choice make a hump back battery pack then raise the ceiling of the battery. both situations are bad. im left with a third choice which is to make it a tail drager, which makes the battery hatch smaller i think. help is always appreciated

Yep, running a 6 cell when the plan calls for 8 is like putting a stock VW Beetle engine in a Corvette.

Use whatever glue seems appropriate when you repair. CA is generally more than adequate. You might want to get a small bottle of thin CA to use when piecing things back together. With thin, you can hold the pieces together and drip a little on the joint. Don't forget to reinforce all the breaks with an additional layer of wood that's at least the same type and at least as thick as the original wood, but don't go overboard. You don't need 1/4" plywood reinforcement at every little crack. For balsa repairs, balsa is good, or 1/32" aircraft plywood. Over-reinforcing, and using gobs of epoxy will add a tremendous amount of weight.

Do whatever it takes to get the battery in the plane, and have it balance.

How far back would an 8-cell stick pack extend? To my way of thinking the extra cells will still be in front of the CG, or at the very worst, right on the CG. The hump pack design might make the plane too nose heavy.

You know where the CG is on the wing. Transfer that point to the inside wall of the airplane (i.e. just measure back from the front of the wing saddle opening). If the extra cells are close to that point, it won't affect the CG much.

I think ill be fine extending the battery pack. It will not effect the cg because there is a space left for the RX battery which im not using(using speed controller with cutoff). so making the pack into 8 cell pack and extending it towards the back instead of making them humpback is ok and i will not effect the cg. the space was meant to take the weight of the RX battery so it should take the 2 extra cells.

now how important is it to make the front gear steerable for the plane to take off from grass? could the rudder control be enough?

Barelias,

I had to deal with almost the same problem in another plane. The rudder servo was too far from the front steerable wheel, so rather than using a long and bent rod, I went for a dedicated servo that I placed right by the wheel. Both servos (rudder and front wheel) are conected in parallel.
Hope it helps.

SM55

SM55,

do u mean that u stripped one the servo wires and connected servos wires to one slot in the reciever?

Barelias, I think SM55 means use a y harness from receiver to each of your servos

Cheers,
Good luck with rebuild...