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Post by pitciblackscotland on Dec 22, 2010 0:45:26 GMT -5
Hi guys i don't know if this is the right spot to put this subject here, anyway i pulled out my JFS from the corner of the work shop so i can get her set up for a test start. I need a start control box does anyone have plans on how i can make one up?. What i would like to do at the momment is do a simple test start using the power insulate switch to start the turbine and switch off eletric power to the starter motor once she lights up would this work?. I did a test start of the eletric starter on 12 volts works fine could also hear the igniter plug working. So if i get two 12 volts batteries to make up 24 volts and hook up a fuel line with a shut off vale i should get a start maybe?  . If any of you guys can give me some advice i would really appreciate the help. Cheers, Mark..  Attachments:
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Post by pitciblackscotland on Dec 22, 2010 0:46:47 GMT -5
Pic # 2 Attachments:
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Post by pitciblackscotland on Dec 22, 2010 0:47:51 GMT -5
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Post by pitciblackscotland on Dec 22, 2010 0:53:12 GMT -5
Pic # 4 Negative and positive cables hook up to eletric starter motor. Attachments:
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Post by pitciblackscotland on Dec 22, 2010 0:54:10 GMT -5
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Post by pitciblackscotland on Dec 22, 2010 0:55:23 GMT -5
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Post by pitciblackscotland on Dec 22, 2010 0:57:11 GMT -5
Pic #7  Attachments:
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Post by ernie wrenn on Dec 22, 2010 9:09:56 GMT -5
24 vdc + to control panel
switch for fuel control relay
switch for ignitor
push button for starter relay.
Fuel 1/4 turn cut off valve... emergency shut down and controller.
Check oil level
Fuel level
Activate spark ign
activate starter
when engine achives stable RPM
Turn on fuel control relay
Do NOT reactivate starter if engine does not atain a self sustaining RPM. Let the turbine STOP and retry. The starter can destroy itself if energized at high RPMs.
Does your unit have a limiting FMU? If so let the RPMs come on up to 100% and watch EGT's.
Now your ready to play...
Ernie
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Post by Richard OConnell on Dec 22, 2010 9:25:49 GMT -5
You could get fancy and add a tach to your box, but for a test start it really isn't necesary. Like ernie said, the first things you need to do is get relays wired in-line with your starter and fuel. you might also want to add an extra safety switch that kills power to the other switches so you wont have an accidental takeoff when your setting your box down  |
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Post by pitciblackscotland on Dec 23, 2010 0:55:47 GMT -5
Thanks Ernie and Richard, I forgot to tell you guys i know nothing about factory built jet turbine engine electrical systems  But this might be a good time to learn. I have a technical manual on the JFS , here some general information see pics and some more pics of bits that came with the engine, is this a starter solenoid?. Cheers, Mark.. Attachments:
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Post by pitciblackscotland on Dec 23, 2010 0:58:19 GMT -5
Pic #2 Attachments:
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Post by pitciblackscotland on Dec 23, 2010 0:59:55 GMT -5
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Post by Richard OConnell on Dec 26, 2010 21:02:51 GMT -5
Looks like a fuel shutoff solenoid to me, but ernie would probably be able to tell you better than I would.
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Post by ernie wrenn on Dec 27, 2010 13:00:41 GMT -5
top left: fuel pump
push button for starter
toggle switch for spark ignitor
Starter relay: battery to 1 large post.. Starter to other large post. Relay has one control wire (small top terminal) and will require a chassis ground.
White part on right appears to be a insulated mount to run a common power lead to and sub feed you other items.( spark ,fuel pump, etc)
Start by hooking your batteries so you have 24 vdc... hook 1 ground on 1st battery to positive on second battery. This will give you 24 vdc at the end of the two batteries.
Run a positive wire to one side of the control relay....
Other side of relay goes to starter..
Ground the APU chassis to the negative terminal and also ground base of starter relay and fuel pump.
Power + to 1 side of switch... other side to spark ignitor
Power + to 1 side of stater button ... other side to starter relay small post.
You will need another switch for the fuel pump control ..
operation:
Turn on spark
push starter button and hold till turbine spins up to approx 40%
Turn on fuel pump and fuel relay (probably mounted on engine)
When flame starts and engine speeds up you can release starter button..
Turn off spark control.
Engine should go up to governer speed approx 90/100%.
Ear muffs are required and a apu will normally run around 40 to 60 thound rpm's. Do not let it scare you, it will sounds like it is going to explode!!
DO NOT TRY TO REINGAGE STARTER UNTILL TURBINE HAS COMPLETELY STOPPED!! IT WILL DESTROY THE STARTER!!
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Post by pitciblackscotland on Dec 29, 2010 16:36:33 GMT -5
Thanks Ernie, I think i need to get a 24 volt starter relay as you can see in the pic 12 v stamp on it. I'll keep you up to date on how i going with the wiring. Most places are shut down for the holidays at the moment, so i'll do some work on the T 30 Cheers, Mark.. Attachments:
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.
But this might be a good time to learn. I have a technical manual on the JFS , here some general information see pics and some more pics of bits that came with the engine, is this a starter solenoid?. 
