Why are there no small turboprops?

Did you know you can buy true turbo jets for model aircraft? They cost
about $3000 and give about 20 lb thrust, They are around 4" in diameter.

I was out for a bike ride and passed by a model radio controlled
airport. A guy was taxiing out and I was thiking, "Oh that is
a ducted fan (or whatever the heck they call it)." I then said to
a guy, "Man that sounds like a turbine." He told me it was.
I went home looked it up online. This is what I came up with.

http://jetcatusa.sitewavesonline.net/p200.html
http://www.jethangar.com/


This guy had an F-14 and some other fighter plane. They had
operable brakes too. Cool but at that price, I could have
paid for my PPL and my IA too....well almost.


Gerald

"Gerald Sylvester" wrote in message
nk.net...
Did you know you can buy true turbo jets for model aircraft? They cost
about $3000 and give about 20 lb thrust, They are around 4" in diameter.

I then said to
a guy, "Man that sounds like a turbine." He told me it was.

This is what we were talking about earlier with the jet
engines on the Cri-cri.

http://www.amtjets.com/gallery_real_plain.html

Some more "normal" and some unusual applications:
http://www.amtjets.com/gallery.html

Paul

On Tue, 25 May 2004 15:27:33 +0100, "Paul Sengupta"
wrote:

"Gerald Sylvester" wrote in message
ink.net...
Did you know you can buy true turbo jets for model aircraft? They cost
about $3000 and give about 20 lb thrust, They are around 4" in diameter.

I think you'll find they cost a *lot* more than that.

OTOH it takes a big airplane to cary enough fuel to go any where
behind a turbine (jet or prop)

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

I then said to
a guy, "Man that sounds like a turbine." He told me it was.

This is what we were talking about earlier with the jet
engines on the Cri-cri.

http://www.amtjets.com/gallery_real_plain.html

Some more "normal" and some unusual applications:
http://www.amtjets.com/gallery.html

Paul

"Roger Halstead" wrote in message
...
On Tue, 25 May 2004 15:27:33 +0100, "Paul Sengupta"
wrote:

"Gerald Sylvester" wrote in message
ink.net...
Did you know you can buy true turbo jets for model aircraft? They
cost
about $3000 and give about 20 lb thrust, They are around 4" in
diameter.

I think you'll find they cost a *lot* more than that.

AMT's prices (excluding tax) start from 2972.00 Euros.
http://www.amt.nl/form_pricelist.php

Or build your own... :-)
http://www.artesjet.com/components.htm

As for fuel consumption, the above site gives a thrust of 92.3N. It gives
fuel
consumption of 0.154kg/N/H. So that's 14kg per hour. About 20 litres? What
is the specific gravity of propane? One of the pages for the Cobra engine on
the
Cri-cri says 0.8kg/N/H.

Paul