Twist and Turn Electric Retract with 3mm Landing Gear Leg (2pc) 29.0g
The easiest way to put retracts in your plane. No need to install a control box, messy wiring or a complicated air system. Just screw in the retracts, connect to your Rx and youre ready! Reliable servo mechanism with metal gearing and a high torque motor ensures trouble free flying, this unit is a Twist and Turn type making them ideal for models like the F4-U Corsair,
P-40 and so on.
Why bother with air systems when you can now have a realistic and reliable electric unit at a fraction of the price?!
Apparently hobbyking was going to stock axles which will attach to these but they haven't appeared yet - you could use a collet with a long screw as an axle for the wheel or do as I have done bend the last bit of the axle and extend it with some brass tube then use a pin through a hole in the end of the tube and washer to hold the wheel on - it would be easier if they made the leg longer but they aren't forthcoming with that option.
There are several options you can use to mount a wheel. There are a few axles you can look for that will attach to it OR you can simply and carefully bend the end to 90 degrees and use a collar to keep the wheel in place. I usually just bend them carefully, put the wheel on followed by the collar.
First of all thanks for your reply, but I need some more help. In this case I can not bend the leg because I need a 85mm leg and (if I have well understood) this is just 86mm, bending the leg I can lose 20-30mm having the plane to close to ground. So the only solution will be to find an axle. But frankly speaking I am not able to find it. Do you know if HK is selling any light and cheap axle good for this retract?
Wow...I searched for the bolt on axles here and looks like the only type HK carries are the ones that are used with the "strap" type landing gear. I searched Tower and Great Planes has what will fit these axles (approximately) - "Great Planes Wire Axle 1-1/4 x 1/8" " - stock number GPMQ4279. They're made for 1/8" gear wire, so are .007" larger than the 3mm ones here but should work. $4.79 for a pair.
These do have the same screw holes on top as the 18.8g set as they are basically the same unit with a different leg surround and base plate but don't come with a separate top mount plate like the 18.8g units do but can be mounted that way.