Project Fun Fly Bomber

Not being able to make a start on the Phase 6 kit build due to restricted space in conservatory (now taken over by the wife's propagator and seedlings) I thought I might as well drag the Thunder Tiger trainer airframe down out of the roof space. No-one wanted it as a sturdy trainer and just cluttered my valuable roof space. So, my plan was/is to convert it to electric and make it suitable for Fun Fly. I have calculated that I need to make up a motor box of 50mm in length to get the motor drive hub just clear of the cowl.

First job was to strip out the fuel tank that appears to have been pre-installed when built, along with polystyrene foam packing. Fortunately there is plenty of room at the CG area to install a bomb bay. So I have cut out the fuselage floor and in progress of creating a bomb drop unit that will screw in to place. I have drawn up a plan that the unit will have a 45mm hole which is just right for ping pong balls (44mm) and small to medium eggs. A slide mechanism will reduce the hole diameter until a servo is energised which will pull back the slide a few millimeters and gravity will pull the bomb item away. There inevitably will be a very slight delay after triggering but once that is figured out it will add to the fun of timing the drop.

Anyone wish to donate a couple of S3003 servos or equivalent std for this worth while project? (Needed for rudder and elevator)

If you are't fussy about quality or reliability, I've got some servos you can have

Thanks Brian. Things to bear in mind though. Reliability? Yes, sort off, as numerous pilots will be flying it and will be looking for an excuse because they did not complete the challenge and will blame hardware, weather, unwarranted jibes from onlookers. :lol: :whistle:

Standard size servos ideal for pre-cut holes, ie; Futaba S3003, Spektrum A6000, etc, etc.

Phil, I just risked getting frostbite in my "shed". The servos are Digifleet, standard size, with arms and grommets. They all tested OK under load and ran on servo tester set to "auto" for ten minutes or so. Plugs are compatible with Futaba/JR. These servos are the last from my old Balsa USA 1/4 scale Piper Cub, never been stressed or crashed. Like me, they are old but still serviceable.

Thanks Brian, I'll give 'em a go.

As you possibly now have a small share in the project it is only right that you too should a "have a go" when it is finished and trials completed.

Some people are really precious about their servos. I have these in my Blue Angel

Really expensive servo

Wow they are expensive. :whistle: P&P would come to more than that. They've got 5 star rating so that's a good thing. I may take another look at them in the future though.

Albeit, I am trying to use any redundant hardware that I already have, motors, esc, etc. I have already exceeded my budget for Dec and January in November.

Motor box cut out and glued up. Fillets to be added. Test fit on air frame looks good.

Phil - I have spare motors & e.s.c's doing nothing - let me know what you need & I'll come back to you.
Colin

Thanks Colin for the offer and may take you up on it later. I am going to use at present an NTM 4248 motor for 4/5 cells.(700 -1130 watts) An 60 amp ESC with extra long battery leads.

You know it is using Mode 2 if you want to try your hand at "bombing" :lol: