Small Turbines

[Bill Mohrbacher]

Turbines development has really accelerated and size has gone up and also down!  How about a turbine less than 3" in diameter, about 5# thrust?  Probably way smaller than anything tried several years ago.  Of course they are not free!

www.sitewavesstores5.com/mm5/merchant.mvc?Screen=PROD&Store_Code=JetCat&Product_Code=P20-SE&Category_Code=TURB

[Trostle]

Here is a smaller one:

http://www.lambert-modellturbinen.de/html/english.html

Just over 2 inches in diameter and about 5 inches long.

Keith

[Bill Mohrbacher]

Thanks Keith, that is the one I was trying to find.  Guys are putting these on and IN FOAM RC planes.  Turbines now have sophisticated starting and monitoring systems.  Neglecting the cost (hah!) I don't see any technical or safety issues to prevent these from being used on control line planes.

[dankar]

What I like about them is they are not loud at all. Watched a guy fly a nice F-86 and it flew wonderful. The F-86 and Mig-15 are my favorite Jets. Downside is mega bucks but sure its worth it .

[FLOYD CARTER]

Turbine development has accelerated, but what about "acceleration"  with a reaction engine? 

Floyd

[Brian Hampton]

...but what about "acceleration"  with a reaction engine? 

Thrust is thrust whether from a prop or turbine but I have to wonder about the gyroscopic precession at 245,000 revs even if the turbine is mid-mounted.

[Dave Hull]

You're going to need some good inlet designs if you are going to maintain thrust through the sharp corners of a control line flight. Unless you fly it like a dynajet speed plane--straight and level.

At the RC field across from our CL circles, we have noticed that a turbine crash virtually always results in a fire. So be sure to bring your fire extinguisher.

One other question: how do you recover from the dreaded runaway throttle, and have you sized your lines correctly?

McSlow