Subject: Small model jet turbine engines

From: [email-masked] (Dale Puch)
Date: Tue, 11 Jun 1996 04:43:51 GMT

I am looking for plans and/or information on making a small model jet
turbine engine.  Say about 6-10 lbs. of thrust range.  Anyone out
there have any information.  Thanks.

Dale Puch   e-mail [email-masked]   
            HTTP://www.magicnet.net/~dpuch
In Cyberspace NO ONE can hear you SCREEEEAAAAAMMMMMMM

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From: [email-masked] (Steven Eisenberg)
Date: 11 Jun 1996 14:45:36 -0600

I am also interested in this kind of information on model jet engines.  
Please forward any help to me as well.  Thanks in advance.

Steve Eisenberg

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From: [email-masked] (James Kirkpatrick)
Date: 11 Jun 96 14:31:09 MDT

In article <[email-masked]>, [email-masked] (Dale Puch) writes:
|>I am looking for plans and/or information on making a small model jet
|>turbine engine.  Say about 6-10 lbs. of thrust range...

The most frequently-mentioned engine seems to be the Schreckling.
>From  the FAQ:

   -  Traplet Publications Ltd.
      Traplet House
      Severn Drive
      Upton-Upon-Severn
      Worcestershire
      WR8 0JL
      England
      http://www.traplet.co.uk/traplet
      E-Mail: [email-masked]
      +44 1684 594505

      Traplet Distribution USA
      144 W Sierra Madre Blvd
      Sierra Madre, CA 91024-2435
      U.S.A.
      All U.S. queries should be addressed to Marianne or Kathy.
      Tel. (800) 523-1736, Intl +1 818 836 6931
      Fax. Intl. +1 818 836 6941

      Primary source for "Gas Turbine Engines for Model Aircraft" by Kurt
      Schreckling, and another book by Kamps.  Some model stores may also
      carry the book(s), such as Sulphur Springs Steam Models Ltd, Box 6165,
      Chesterfield MO 63006-6165 (per an ad in Feb/Mar '96 "Strictly I.C.").
      See Traplet's web pages, under "Books" for price and ordering info.

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From: [email-masked] (Dr. Stefan P. Mueller)
Date: Mon, 17 Jun 1996 14:40:43 +0200

In article <[email-masked]>, [email-masked] (Dale Puch)
wrote:

> turbine engine...

Recently I stumbled avross a web page mentioning a small jet engine:

     http://itrinews.itri.org.tw/english/today/rd/to-3-07b.htm

I never thought anybody would try to build one, even less what it might cost.

Stefan

-- 
Dr. Stefan P. Mueller, Nuklearmedizin, Universitaetsklinikum, Essen,
 e-mail: [email-masked], phone: <49> 201/ 723-4179, FAX: -5964

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From: John G Wright <[email-masked]>
Date: Mon, 17 Jun 1996 20:04:29 +0100

In article <[email-masked]
essen.de>, "Dr. Stefan P. Mueller" <[email-masked]> writes
>I never thought anybody would try to build one, even less what it might cost.
I put the following note in Internet which has generated interest
I expect that you missed it.:-

I have been asked for help with info on making model jet turbines. They
can be made from published designs and will work. The hobby is in its
infancy and the designs are evolving. I hope others will find this info
helpful.

There are 2 books available both written by Germans and recently
translated into English the first is by Kurt Schrekling and called Gas
Tubine Engines for Model Aircraft. The second is Jet Engines by Thomas
Kamps.Both books are available from Traplet Publications and they have a
good web site at http://www.traplet.co.uk/traplet the books can be
ordered on the internet and there are pictures of both front covers.  

I have made Kurt's engine and have like all involved found it an
absorbing hobby. The actual making of the parts is reasonably
straigtforward but it is not easy to make changes because there are so
many variables. The engines all tend to run hot (red hot!) and the only
succesful one is the one that runs at about 500 centigrade. I have had
results similar to those Kurt claims for the design 4.5Lbs thrust at 600
centigrade and 72,000 rpm. I have seen an engine with a revised
combustion chamber run at 6.5Lbs thrust at higher revs and still be at
less than 500 centigrade, so I know that it is possible to get good
results.

When Thomas ran his engine he was getting about 8Lbs thrust at low
temperatures but the engine is heavier than Kurt's. I have not heard of
any that have made Thomas's design yet.

Several are flying with these engines. The power to weight ratio is 1:2
so they will power an 11-12 lb model. I have only seen the videos which
look really spectacular. The sound is really like a jet with a whistle
and a roar. The noise levels are apparently lower than piston engines ,
but I still wear ear defenders when running mine on the bench!

The materials are aluminium and 310 or 316 stainless for the parts that
get hot.The compressor on Kurts engine is made of plywood! and the one
on Thomas's is a car turbocharger compressor. The welding is TIG welding
which I had the local shop do for me.

I hope that this note gives you enough to whet your appetite.
Incidentally the AMA has just banned the flying of home built turbines
in the US. I do not know why! Thankfully we seem to be more sensible in
the UK and are eager to learn ande develop safely.

John

-- 
John G Wright