jack
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Joined: December 2013
Posts: 20
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Post by jack on Jan 17, 2014 15:56:08 GMT -5
This week i have bought a Boeing 502 turbine and i think it's in quite reasonable shape. The only thing missing are the glow ignitors, so i have to figure out something for that. I am trying to use some diesel glow plugs, but as you can see in the video i think they are to weak. Maybe if i use some plugs from a truck diesel wil solve it?? Others ways to fix this problem are very welcome!!  |
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Post by turbochris on Jan 17, 2014 16:38:59 GMT -5
is that the gas turbine/compressor that was on ebay? what is the rubbing sound? Yeah, you'll need something w more spark energy.
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jack
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Joined: December 2013
Posts: 20
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Post by jack on Jan 17, 2014 17:58:17 GMT -5
I don't exacly know where the sound come's from, but i think there is a bit of a whisle in the stater motor.
And no, it's not the engine from ebay but from the dutch marketplace.
I think whit some flame plugs or glow plugs from a large diesel i could get him back to live.
Luckely it's a fairly simple engine to work on.
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Post by racket on Jan 17, 2014 19:45:20 GMT -5
Hi Jack
How come the starter operates , theres a puff of "smoke" from the exhaust , but the compressor wheel isn't rotating for a few more seconds ..............strange ??
Or is it just a "camera thing"
Cheers
John
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gidge348
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Joined: September 2010
Posts: 426 
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Post by gidge348 on Jan 18, 2014 1:16:25 GMT -5
Sorry, might be getting a bit lost here, but you mention using "diesel glow plugs".
How are you powering them? Can't hear an igniter going? Are you trying to light the engine with the glow plug? Glow plugs and Igniter plugs are quite different.
If that is the case, I am sure we can help you get it going.
Ian...
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jack
Member
Joined: December 2013
Posts: 20
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Post by jack on Jan 18, 2014 3:36:17 GMT -5
It's not a camera thing, it's because this is a airstart unit. So what you are seeing is the compressor wheel from the air blower.
There is no ignition unit that produces a spark, but there are on both sides 2 thick + & - cables. When i start, theres a constant plus on the cable.
So thats why i also think it has to be glow plugs.
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jack
Member
Joined: December 2013
Posts: 20
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Post by jack on Jan 18, 2014 4:18:26 GMT -5
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Post by racket on Jan 18, 2014 5:06:33 GMT -5
Hi Jack
Very interesting , I've never seen one of these before ...................LOL, the air blower comp wheel in the video is driven by a second turbine wheel (freepower) , no wonder it spooled up with a bit of lag time :-)
Heh heh , maybe an afterburner on the start air exhaust ??
Cheers
John
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Post by turbochris on Jan 18, 2014 9:23:39 GMT -5
no way John, put a gearbox on it and haul ass! big ole clunky bitch here!
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Jan 20, 2014 20:17:55 GMT -5
There is no ignition unit that produces a spark, but there are on both sides 2 thick + & - cables. When i start, theres a constant plus on the cable. So thats why i also think it has to be glow plugs. I am still confused about how a glow plug can start a turbine, all the 502's I have seen have an igniter box and plug? www.turbokart.com/images/Boeing502/igniterbox.JPGCould it be possible that your engine just has the box & plug missing? Ian... |
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jack
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Joined: December 2013
Posts: 20
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Post by jack on Jan 21, 2014 17:16:15 GMT -5
Sure would that be possible of course. But then i'm still wondering why there is a thick pos and neg cable on each combustion chamber?
Some where on the internet i've read that older turbines may have used glow plugs as an ignition source. That's why i think it may be used in this turbine, but i could be wrong of course.
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jack
Member
Joined: December 2013
Posts: 20
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Post by jack on Jan 21, 2014 17:56:05 GMT -5
Starting with a glow, or sparking to fire it up, both ways make me happy when it runs.
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Jan 21, 2014 19:52:00 GMT -5
Hello Jack, I am sure you are right, not sure is this is any use, but I have found a wiring diagram for a 502-6 that might help www.nuclearprojects.com/boeing502/images/electricalsystem.jpg You may want to track the wires and compare to the diagram and see what is the same and what is different may give some clues? Cheers Ian... |
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jack
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Joined: December 2013
Posts: 20
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Post by jack on Jan 21, 2014 22:20:10 GMT -5
Thanks Ian,
The engine shown here is a bit different, but there are things in the diagram that are the same, and other things are totaly different.
But that does' n matter, the diagrams are some very good help, so thank you Ian.
If it was easy to get it started, it would'n be a challenge.
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jack
Member
Joined: December 2013
Posts: 20
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Post by jack on Jan 22, 2014 12:59:46 GMT -5
Hi Ian,
You where absolutely right about the ignition box, and it's missing on my engine.
The best thing now is to find a original igniter unit, but that's like a needle in a haystack i think. Or i have too look for something else that produces a decent ignition. Ideas are welcome.
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