Bent Main Mast cannot be avoided after you had crashed your heli. Some hobby shops closed on week-end or on public holiday and you run out stock of your spare Main Mast.
The following tip will help you to fly your heli back in the air.
Get a mallet, an approximately 1X1ft of a glass mirror, two 5mm wooden blocks or anything similar. Only wooden/plastic/rubber mallet to be used. DO NOT use any metal mallet or a hammer! This will damage the main mast.
First mark the pitch rod ball-link with red or blue tape by looking at the Rotor Blade colour. This is important to prevent out of track rotor blade and vibrations after installing back later. Remove the M3 nuts and 3X20 cap screws from the centre hub and the main gear. Loosen the two 3mm screws of the collar and a 2.6X8mm cap screw of mast stopper. Remove the center hub and the collar then slowly pull-out the main mast through the main gear, the mast stopper, and the swash plate.
Now placed the bent Main Mast on a glass mirror and roll it slowly. You will see a gap between the main mast and the mirror.
Then place the bent main mast on the wooden blocks and knock the bent main mast once or twice at a time. Place it again on the mirror and roll it slowly. Repeat this procedure until you will see no gap between the main mast and the glass mirror. Now your bent main mast was straight again. From now on, don’t throw away your bent main mast. Try it and save $$$!
This technique also can be used for bent spindle bar or tail output shaft.
Note: THIS METHOD REFERS TO CALIBER 30. THE SAME METHOD CAN BE USED FOR OTHER MAKE OF RC HELIS…..
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