> > My guess is that you will run into significant red-tape with
> > regulations/certification.
>
>I'm expecting that - public safety etc. So it's by no means
>certain that this will go ahead. Had a similar problem
>recently offering to do house improvements for someone.
>Job and materials was the easy bit. Eventually didn't get
>done because of expensive council and govt BS

There are a few certified electric props and they are worth quite a few $$
Hoffman is one of the big ones and you can kiss about $8K++ goodbye to
start. There are other non certified props such as Warp and Ivo that have
inflight adjustable props. Both of those have problems with various parts
of the control mechanism. Even those will set you back about $2K.

To certify the part you would be looking at 10's of thousands of cubic $
for the basic part. The testing is involved and require people with alphabets
to write various reports and tests.

If he's doing it for a amateur or home built then you don't have restrictions
other than a couple of sue happy people who were trying to go after anyone
building a governor for one of these. I think they stopped doing that a few
years ago.

Yeah, I'll be doing that, just thought someone here may
>have some quick and ready info

Sounds like a few people here fly, just need a bit more info on what he's
working with.
Worked out the software for it a few years ago using a 8051 and a hall sensor.

Dave

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