How many people are building airplanes?

Paul Lamar

Hi Paul,
We met a Narrowmine a few years ago and I have been following your blog
ever since.

I have recently taken over the manufacture of several aircraft. The
Sadler Vampire,
Morgan Aeroworks ( now called Wedgetail Aircraft) line including the
Sierra and Cougar.

We have had a lot of interest in the Vampire from Europe and the UK as
it fits a lightweight
category. I am thinking of changing the design to mount the Austro
rotary behind the rear spar.
Any thoughts on this engine would be appreciated. We have a couple of
these motors at my
airfield ( in motorgliders) but the cramped installation causes problems
not engine related.

I would like a lightweight single rotor of about 60+ Hp, a larger single
rotor of 120+ Hp and a
two rotor of about 150+ Hp.

Ray Tolhurst
Sydney, Australia

 That is very interesting. You will need about 100 HP. The  Vampire
design is too big for anything less.
The Austro is limited to 55 HP which is marginal for the Vampire.

  The Vampire is a versatile design as Rotomax was using that
design to show case the 150 HP Rotomax engine.  Unfortunately they were
using a German
rubber coupling design that was flawed. It failed and the airplane crashed.
No loss of life but it bankrupted Rotamax. We solved that
problem with the TTC design rubber coupling.

Well you are in luck as Promaz in Melbourne is now building all aluminum
one rotor engines
at relatively low cost. I highly recommend working with them as it would
be highly advantages for both of you.

Here is the contact information.


Simon Ioannou | Director
51-53 Strong Ave
Thomastown, VIC 3074
Ph: +61 3 9462 3727
Fax: +61 3 9462 3721
E: simon@promaz.com.au
W: www.promaz.com.au


Neal Unger is working on a gear box in Parkes  NSW so you will need one
of those.
Or a 3:1 belt reduction.

Are you planning a Booth at Narrowmine this year?

Here are a bunch of pictures of the RotoMax powered Vampire.

Paul Lamar

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I think I made a mistake on the price of the Promaz end housings.
I thought it was $2,000 Oz but it is  $2,000 US which is a lot more money.
I think racing Beat is selling them cheaper in the US. Last time I checked
it was $1500 US at Racing Beat. The Oz dollar is 74 cents US.

Racing Beat.

www.racingbeat.com/

Paul Lamar

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