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Picking a first turbine?

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Picking a first turbine?

Old 01-18-2021, 11:55 AM
  #1  
LarryFitch
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Default Picking a first turbine?

I think I understand the gas and glow market of IC engines, but when I start looking for a first turbine, I only get confused. I'm looking for a 12 to 14 pound thrust turbine to power a JetMach 60 airframe as my first turbine. How can someone (me) select a quality turbine that is appropriately simple to operate, is reliable? Thoughts? I'd like a simple kero start and run turbine. There is no one in my area that flies turbines, so seeking help from other locals is not likely possible. I've built and flown powered airplanes and gliders for many years, but know very little about turbines.

Thanks,
Larry
Old 01-18-2021, 02:27 PM
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Maxthrust
 
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Default

I've got two Jet Mach 60 that I fly regularly from a grass runway. One is powered with a KingTech K85 (19.5 pounds dry) and the other with a JetsMunt VT80BL (20 pounds dry).
The K85 airframe was originally fitted with an older Jet Central Super Bee (14lbs thrust) and it powered the aircraft just fine. The engine was retired and replaced with the K85.
On both airframes the opening in the bulkhead just in front of the turbine needs a slight increase in diameter to accomodate the FOD screen and engine. Beyond that the K85 and VT80 engines fit easily and there was no need to enlarge the fuselage side air intakes. In both applications I reduced the maximum rpm; the K85 was reduced by 15K.
From my experience with that airframe I wouldn't want less than 14 lbs thrust for grass operations. I opted for the K85 and VT80 engines to have a broader choice of airframes should I retire the Mach 60s.
P.S. I just checked the Kingtech specs. K55 (12.1 lbs) K70 (15.5 lbs) K85 (18.74 lbs). Can't go wrong with either the 70 or 85.

Max

Last edited by Maxthrust; 01-18-2021 at 02:39 PM. Reason: added PS
Old 01-18-2021, 08:29 PM
  #3  
LarryFitch
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Default Thanks

Maxthrust, thanks for the recommendations and information. It helps!

Larry

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