APS/Ω Gas turbine bike build

[Mobacken Racing]

I measured the oil flow through the engine yesterday to see exactly how much that passes through it in a minute, at 5 bar oil pressure I got 1.8 liters/minute through the scavenge lines.



Other than that I bundled the wiring together and heat shielded it with exhaust wrapping and aluminum tape where it will be subjected to radiant heat from the engine.



Earlier I bought a lenght of heat resistant cable cover that I intended to use on the bleed air line from the engine to the gearbox.



Since the bleed air line is standard pneumatic hose (to see any eventual oil leakage) I needed to shield it, if not it would probably have melted.



The battery got wrapped with a section of fire blanket.



With that done I adjusted the two Hobbs pressure switches, one set to 3 bar on the oil line and one set to 3 bar as well on the P2 line to the pressure gauge.



If the oil pressure drops below 3 bar the fuel pump shuts off, also if the P2 rise above 3 bar it shuts off. That is a simple and bullet proof over speed protection in case the PWM controller fails and lets the fuel pump run flat out. I would never have time to manually shut the engine down in case it happens during a run so it will be a great safety feature.



This weekend I will test the preheat system and when it is checked I can start filling the scuba tanks for the upcoming test start!

Cheers!
/Anders

[Buickguy3]

  The oil appears to be aeriated and foamy. Is there an air leak on the suction side? May not be a problem, just wondering.
    Doug 

[manta22]

I thought the same thing.

Regards, Neil  Tucson, AZ

[Mobacken Racing]

I have a bit of over capacity on the scavenge pumps to cope with the compressed air leaking past the piston ring seals into the shaft tunnel, when the engine isn´t running the pumps pull air in through the seals.

That is actually a good thing since it keeps the oil from leaking out into the engine casing.

[Mobacken Racing]

I took the bike outside to get a video of me testing the propane preheat an hour ago, my feancee held the camera while I was busy talking my head off and getting the preheat to light off. Just before the camera was started I did a test where it lit immediately but when the camera is rolling I gave it too much revs before I hit the preheat button so it took a while before it lit off.



All I need to do now is to refill the scuba tank and bleed the rear brake caliper in case I want to take her for a short run if everything seems to work ok. Fun times ahead!



Cheers!
/Anders

[sofadriver]

you've got time for work, this AND a woman ?!!! 

Now I'm really impressed!

[Crackerman]

And a kiddo!

Anders, where do you find time to sleep?

[Mobacken Racing]

Actually two kids, a couple of lovely daughters 2 and 4 years old. Plus a house that needs fixing, a one man company (mechanical work and fibre optic welding) on the side of the employment and a handful of other hobbies like running, motorcycling and a newly found interest in black powder revolvers.

It´s no problem at all, but I can´t remember how it felt like idling around not knowing what to do with my spare time...

[Mobacken Racing]

I just couldn´t have a ready to run bike in my workshop any longer, so while those prancing football players were rehearsing their best theatre acts for the upcoming game I went outside to try to start the bike.



I´ll probably watch this clip 15 times before I go to bed with a stupid smile on my face tonight.



Not a bad run at all, the temps were a bit high and the throttle responce wasn´t like when it ran as a pure jet so I think the freepower NGV area needs to be opened up a bit. No rubs or anything noticeable so I think the engine is a survivor.



The drive chain threw some of its grease off, I´ll probably want to have the rev counter for the power turbine fixed before next start.



Big darn cheers my friends!!!
/Anders

[manta22]

 

[Peter Jack]

Some things are even better than winning a trophy. You're a winner Anders! 

Pete

[Buickguy3]

  Anders, That makes me want to come over there and be a crew member. [Except I know nothing about turbines]. Keep sending more test videos.
     Doug 

[Seldom Seen Slim]

I gotta admit that I don't know that much about what you're building - but I do about the silly smile on your face after a successful first run of the motor on the bike.  Congratulations, and like Doug said -- keep posting those videos so we can see more of the bike and your work.  Thanks.

[SaltPeter]

Fantastic work there Anders   

Pete

[Vinsky]

If you think Anders isn't a mad scientist, look at the rest of his youtube videos. He has an obsession with rocket and jet powered vehicles.
I hope I get to see this jet bike run. Have you given it a name yet Anders?