Turbine Kitfox? Oh yes!

[jabkwab]

http://www.stuttgart.engineering/

http://www.stuttgart.engineering/s/cc_images/cache_59696015.JPG


How cool is that!

[Esser]

"Jet sound, jet smell, jet feeling.
No compromises."

They forgot jet fuel consumption!

A 65lbs engine sounds nice. Even with the double fuel consumption

[avidflyer]

Not a Kitfox though, it's actually and Avid Flyer... :-) At 10 gallons per hour though, I think it will be a while before I place an order. ;-) Still kind of neat. Thanks for posting it. JImChuk

[kmach]

I saw somewhere in their data 27kg/hr fuel burn for the 100 hp and 32kg/hr for the 130 hp.

[cubtractor]

I could see that on mine.....

[colospace]

I want to see that at OSH!

[Av8r3400]

If my calculations are right, 27kg/hour is about 7 gph.

[avidflyer]

I believe a kilogram is 2.2 lbs. 27 X 2.2 = 59.4 lbs. Don't know off hand the weight of jet fuel, but gas is about 6 lbs, so that's where I came up with about 10 gallons per hour. Not exact, but close I think?? JImChuk

PS before I posted this, I googled jet fuel weight, and it's 6.84 lbs per gallon. That would make for a 8.68 per hour fuel burn.

[Av8r3400]

My bad. I don't know where I got the idea for 8# per gallon. That's gas...

[DesertFox4]

I haven't seen a price.

[Clark in AZ]

Bet it costs more than the airplane! :D

[kmach]

Jet A is 6.8 lbs / US gallon .

[GregA]

Cryptic bit on price at the bottom. $13000 euros for the 130HP model, but sounds like that is at TBO of 2000 hours, so not clear if that price is for the rebuild or a fresh engine.

[TJay]

Does it meet Lsa Requirements? Or does LSA need to be Piston engines?

[avidflyer]

I believe light sport has to be reciprocating engines only. Don't think the turbine qualifies then. JImChuk

[Av8r3400]

LSA requires a piston engine and a fixed or ground adjustable prop.

A free turbine engine requires a feathering, constant speed prop and has no pistons... :cool:

[Wheels]

Is there any video of that plane flying? I just wanna hear it! I was a turbine mechanic for years in the Marines. Was a long time ago. Think ... Journey, Doobie brothers, the Police, etc

[rv9ralph]

Wheels, as a former turbine mechanic, can you confirm something I heard during my service.

"The only difference between turbine aircraft and turbine pilots is...
When the aircraft is shut down it stops whining."

Is this true?

Ralph

[Wheels]

That is actually true! Very few people know it though unless they have been on the flight line during a routine start up to avoid spin tach.

[jd99336]

Is there any video of that plane flying? I just wanna hear it! I was a turbine mechanic for years in the Marines. Was a long time ago. Think ... Journey, Doobie brothers, the Police, etc

Hey.....:mad: I resemble that remark....:D. EA6B J52-P408 USN. Sounds like the same era too. Boy I feel old

[atc310r]

Cryptic bit on price at the bottom. $13000 euros for the 130HP model, but sounds like that is at TBO of 2000 hours, so not clear if that price is for the rebuild or a fresh engine.

I think that is just the estimated cost of a TBO on the 130hp model. It says 10k euros for the 100hp. So by that logic the engines must cost well over 30,000 I would imagine. Plus they are brand new and may have bugs. Still, very promising especially for guys who fly out of high altitude places as you have full power up to 33,000 feet! And the incredible light weight as mentioned before.

Somebody call them up and give them a credit card ;)

[Dougj]

Youtube taxi test video, unfortunately music covers much of the sound.

https://youtu.be/5XPZY1Ec8lc

[Dougj]

I'd like to see some detailed specs and an internal/airflow diagram. Single stage everything = simple.
From their website for the 100hp version, I added conversions.

Engine type: Turboprop

Compressor: 1-stage centrifugal flow compressor
Turbine: 1-stage gas generator power turbine and 1-stage free power turbine

Lenght: 555 mm (21.85in)
Diameter: 280 mm (11.02in)
Dry Weight: 28,00 kg (61.73lbs)

Maximum Power Output: 100 hp up to 33.000 ft (Flat rated to 33k??? Gotta be an error.)
Air Mass Flow: 0,97 kg/sec
Overall Pressure Ratio: 3,5:1
Fuel consumption: 27kg/hr Diesel (59.52PPH/7.3 = 8.15GPH of DIESEL)
Lubrication: 145gr/hr Turbine oil
Gearbox: Epicyclical, equipped with oil cooling radiator
Number of fuel injectors: 6
TBO at 2.000 hours or 10 years
TBO estimated cost € 10.000

[Flyboy66]

If my calculations are right, 27kg/hour is about 7 gph.
Jet A is about 6.72 lbs/ gallon.

[PapuaPilot]

6.72 lb/gal is correct, I usually just used 6.7 for my calculations.

This means 59.5 PPH is actually 8.85 GPH. That is nearly double the fuel burn of a piston engine of the same HP. The only way to get turbine engines efficient is to get them up to high altitudes, but then you would need to have oxygen.

[GuppyWN]

6.72 lb/gal is correct, I usually just used 6.7 for my calculations.

This means 59.5 PPH is actually 8.85 GPH. That is nearly double the fuel burn of a piston engine of the same HP. The only way to get turbine engines efficient is to get them up to high altitudes, but then you would need to have oxygen.

Yeah but the cool factor is off the charts! Go screw around for 2:45 and use the last :15 to climb like hell before it quits! 🤣

[Flyboy66]

Wheels, as a former turbine mechanic, can you confirm something I heard during my service.

"The only difference between turbine aircraft and turbine pilots is...
When the aircraft is shut down it stops whining."

Is this true?

Ralph

Mom: So Billy, what do you want to be when you grow up.
Billy: I want to be a pilot!
Mom: Sorry Billy, you can’t do both.

[Floog]

Good one! That definitely applied to me. I never grew up. No worries.

[Flyboy66]

6.72 lb/gal is correct, I usually just used 6.7 for my calculations.

This means 59.5 PPH is actually 8.85 GPH. That is nearly double the fuel burn of a piston engine of the same HP. The only way to get turbine engines efficient is to get them up to high altitudes, but then you would need to have oxygen.

Quick and dirty is drop the last digit (of the pounds) and add half.

1000 lbs: drop the last digit and it becomes 100, plus half (of 100) is 50 gives 150 gallons per 1000 of jet fuel. Does not work for Avgas or gasoline.

[jrevens]

OK, if you're thinking about that turbine, or maybe a Zipper big-bore mod for your 912, here's another option to get some major increased horsepower, as seen in the January, 2018 Sport Aviation! However, it might require some minor engine mount and cowl modification. ;)

[efwd]

LOL. Awesome! Plastic! Looks light.
;)