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Old 11-18-2018, 07:28 PM   #1 (permalink)
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Default Kavan Bell jet ranger......What size modern mechanics?

I found one of these locally that is as new but the mechanics seem a bit dated.

What size modern mechanics would this fuse require?

600? 700?
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Old 11-19-2018, 06:21 AM   #2 (permalink)
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Measure the distance from the main rotor to the tail rotor. 80cm=600, 92cm=700.
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Old 11-21-2018, 09:27 AM   #3 (permalink)
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By my measurement it is 100cm and the instruction manual says 740 as the length to trim the wood blades to.

I'm assuming 700 size mechanics and blades? Would there be issues using the factory head and making it FBL?
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Old 11-21-2018, 01:51 PM   #4 (permalink)
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That's an odd size. Isn't there a TRex 760 that you could steal the boom and torque tube from? Maybe that fits.
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Old 11-21-2018, 04:55 PM   #5 (permalink)
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Quote:
Originally Posted by getsuyoubi View Post
That's an odd size. Isn't there a TRex 760 that you could steal the boom and torque tube from? Maybe that fits.
This thing is so old school there is no tail boom, the fuse is the tail with a miter gearbox on the tail using a wire drive inside a brass tube.

I might just modify the existing mechanics to incorporate and electric motor and use that for power with a different servo layout.

The entire mechanics, servos, linkages, receiver, everything save for the engine are all up in the doghouse. 7 screws hold the doghouse on and removing them lets you remove everything except the engine.
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Old 08-15-2019, 08:30 AM   #6 (permalink)
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Hello
I'm working on 2 Kavan Jet Rangers. I am converting to electric, updating to torque tube tail drive and modifying the controls.
The reason I went this route is so I can detail the inside the fuse.
The original way was to glue the mechanics to the top cabin then only 4 screw holding it to the fuse. I made mounting brackets to the top part of opening where the wooden plate for the mechanics bolted to the main body of fuse in 6 areas. Also re enforce the wooden plate. Next modifying the main gear hub with a one way bearing.
I'm using Futaba BLS272SV, BLS256HV and CGY750. I have installed the sound system in them.
Hope to be able to compete next year at the Nats and IRCHA.

Dan
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