Marc Wiese wrote:

See attached, discussion follows:

I talked to the maker of the 23B motor a bit.  It is a prototype;

the custom e-shaft is indeed a two piece.  The center plate does have
some sort of bushings to support the center of the e-shaft.  Not
having
taken a motor apart, especially a 20B, I wasn't 100% clear on what he
was saying but he said something about those bushings & stationary
gear(s) actually extending into the adjacent rotor housings. He was
quite proud that his 23B was the same length as 20B.  It is an
interesting concept - I hope he can make it work.

I don't know... I do know that they do this with custom 3-rotor
engines.  There's nothing preventing the rotor from slipping from
one

rotor and sliding on to the next, is there?  That's how a 13B is put
together.

No, the rotors can't slide between rotor journals. This is why the
20B
has the inherently weaker 2-piece e-shaft. The 26B (4 rotor) uses a
3-piece (extra journal on either end) e-shaft with similar results --
it works, but is not ideal. FWIW, the 4-rotor Rob owns rights to is
really two 13Bs with a proprietary e-shaft, sectioned in the middle.
It

is actually shorter than the factory 26B and has a stronger crank,
though it uses a 180 degree journal offset so it might not be _quite_
as smooth. Can't wait to put it in something, but Rob is busy with
his
own one-rotor project and someone rather important (sorry, I can't
say)

wants him to work on a couple special projects ASAP. It also doesn't
help that he has a one month backlog on engine rebuilding for regular
customers....<<<<

Marc Wiese

That puppy needs to be turbocharged and put in an experimental version
of an MD500 5 seat helicopter.

Hans

 
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