Espritmodel.com Telemetry Radio
Steve_'s blog
Posted by Steve_ | Oct 20, 2013 @ 02:38 PM | 2,686 Views
There have been so many questions about my 250 conversion, I decided
to document this build, so others can share my joy with this awesome bird.

HK250 FP Conversion Flying like a crazy person. (5 min 0 sec)



There are a million ways to build it, this is just how I did mine.

Much editing was done, so I probably repeat myself in places, so please forgive
me if I don't catch the mistakes.

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Today we will shim the head to allow a mounting to the smaller 3.5mm 250 shaft.

The FX059 (E-1003) head is designed for a 4mm shaft, and requires a custom
made shim to fit properly.

Pictured are the things we need to start. ( 3rd picture )

A small hobby size pipe cutter can be substituted for the Dremel and cut-off wheel.

In a pinch, a saw with a fine tooth metal blade would work, but you would have to
clean up the edge, and you might bend the weak aluminum shim.

The super glue is so we can glue the shim inside the shaft, and the razor blade is so we
can score the shim, allowing small crevices for the glue to "grab".

Brass tubing would be stronger than aluminum, but I also used aluminum on my
larger 300x conversion and it works fine, even with the higher stresses and loads.

Aluminum is also much easier to drill, and lighter.

First, cut a piece of tubing about 40cm long. It will stick out the end of the head when inserted,
so we have something to grip, and the excess will get cut off later.

Take your razor blade...Continue Reading
Posted by Steve_ | Feb 28, 2013 @ 02:15 AM | 3,281 Views
Just pictures. You can figure it out from here.

Bearings are 2 x 5 x 2.5 mm.

You need a 5 mm drill bit to enlarge the bearing mount.

Shaft is 2 mm, and 35 mm long.

My CF shaft came from the canopy mount for a Honey Bee CP3.

The aluminum collar is a chopped up CP3 tail prop mount....Continue Reading