I'm Wondering.
04-19-2005 | 06:52 PM
#2
My Feedback: (25)
RE: I'm Wondering.
ORIGINAL: Philng
I'm Just Curious of how do you guys start up these jet engines? They're so cool to listen to.
I'm Just Curious of how do you guys start up these jet engines? They're so cool to listen to.
Hand crank....just like the old Model T used. When your arms give out, the next man takes over. The kick back is not quite as extreme on the turbines as it was with the Model T though.
04-19-2005 | 08:01 PM
#5
Thread Starter
Senior Member
My Feedback: (1)
Joined: Oct 2004
Posts: 216
Likes: 0
Received 0 Likes
on
0 Posts
From: West Henrietta,
NY
RE: I'm Wondering.
oh ok, that would be hard trying to spin it up that fast using your hands. oh, is it possible to add an afterburner to one?
04-19-2005 | 08:26 PM
#6
My Feedback: (29)
RE: I'm Wondering.
It is against current AMA rules to use an afterburner. There is one production turbine in Europe that has an afterburner on it. Fuel consumption on turbines is pretty high and an afterburner would make it much worse. Most jet models now days are near 1 to 1 thrust to weight ratio or better anyway, so afterburners really are not needed. Most models could not handle the extra heat, either.
04-20-2005 | 01:00 AM
#8
Banned
My Feedback: (119)
RE: I'm Wondering.
See that bullet shaped thing on the front of autostart engines? That takes a shotgun cartridge minus the buckshot. You whack on the front of the housing with a hammer, the firing pin sets off the starter cartridge, and the blast from the cartridge spins up the engine. That's how we do it in Brooklyn, those dopes down in Kentucky want to hand-crank, it's no sweat offa MY back.
04-20-2005 | 06:08 AM
#9
My Feedback: (25)
RE: I'm Wondering.
ORIGINAL: EASYTIGER
See that bullet shaped thing on the front of autostart engines? That takes a shotgun cartridge minus the buckshot. You whack on the front of the housing with a hammer, the firing pin sets off the starter cartridge, and the blast from the cartridge spins up the engine. That's how we do it in Brooklyn, those dopes down in Kentucky want to hand-crank, it's no sweat offa MY back.
See that bullet shaped thing on the front of autostart engines? That takes a shotgun cartridge minus the buckshot. You whack on the front of the housing with a hammer, the firing pin sets off the starter cartridge, and the blast from the cartridge spins up the engine. That's how we do it in Brooklyn, those dopes down in Kentucky want to hand-crank, it's no sweat offa MY back.
1. Commence vigorous hand cranking, 2 operators.
2. At IGNITE speed, tachometer indicating 450 to 550 rpm and fuel pressure gage reading 550 lb/sq. in. minimum, open fuel control valve to on position.
3. Continue vigorous cranking to STOP CRANKING speed, 1200 to 1300 rpm indicated on tachometer, from which point the engine will accelerate normally to rated speed.
With engine stabilized at rated speed, oil pressure should be 20 lb/sq. in. minimum and exhaust temperature normal operating range is 600 to 950 deg. F, (315 - 510 deg. C).
Normal running speed is 4430 rpm, speed must not be allowed to fall below 3600 rpm and avoid running at speeds in excess of 4500 rpm.
Shut down sequence to stop engine, allow 2 to 3 minutes running at no load in order that engine may cool down, turn engine fuel control valve to off position.
Note that all tachometer speeds quoted are output shaft speeds, the turbine is actually turning at over 40,000 rpm. The spiral bevel gear in the gearbox is rotated at 9.1 to 1 by the bevel pinion mounted on the end of the turbine rotor shaft. A reversal of this speed reduction by hand cranking, together with the speed increase in the chain and sprocket linkage, allows the operator to crank the engine with an approx. 70 to 1 speed increase. The magneto operates continuously to fire the spark plug whilst cranking and stops when hand cranking is discontinued, the sprag clutch disconnects when the turbine speed exceeds the cranking speed.
04-20-2005 | 08:31 AM
#11
Banned
My Feedback: (119)
RE: I'm Wondering.
ORIGINAL: Countryboy
Way too go ET.... lead your fellow New Yorker astray!!! Shotgun shell you say, well here's a thought.... don't hold your farts in, they will travel up your spine where they reach the brain, and that is where shi*ty ideas come from. Although my reply too the inquiring mind of Philng was perhaps in poor taste, it was all in good fun... sorry Philng. The only thing is ET, unlike your shotgun shell method, my recommendation does hold a wee bit of validity.
1. Commence vigorous hand cranking, 2 operators.
2. At IGNITE speed, tachometer indicating 450 to 550 rpm and fuel pressure gage reading 550 lb/sq. in. minimum, open fuel control valve to on position.
3. Continue vigorous cranking to STOP CRANKING speed, 1200 to 1300 rpm indicated on tachometer, from which point the engine will accelerate normally to rated speed.
With engine stabilized at rated speed, oil pressure should be 20 lb/sq. in. minimum and exhaust temperature normal operating range is 600 to 950 deg. F, (315 - 510 deg. C).
Normal running speed is 4430 rpm, speed must not be allowed to fall below 3600 rpm and avoid running at speeds in excess of 4500 rpm.
Shut down sequence to stop engine, allow 2 to 3 minutes running at no load in order that engine may cool down, turn engine fuel control valve to off position.
Note that all tachometer speeds quoted are output shaft speeds, the turbine is actually turning at over 40,000 rpm. The spiral bevel gear in the gearbox is rotated at 9.1 to 1 by the bevel pinion mounted on the end of the turbine rotor shaft. A reversal of this speed reduction by hand cranking, together with the speed increase in the chain and sprocket linkage, allows the operator to crank the engine with an approx. 70 to 1 speed increase. The magneto operates continuously to fire the spark plug whilst cranking and stops when hand cranking is discontinued, the sprag clutch disconnects when the turbine speed exceeds the cranking speed.
ORIGINAL: EASYTIGER
See that bullet shaped thing on the front of autostart engines? That takes a shotgun cartridge minus the buckshot. You whack on the front of the housing with a hammer, the firing pin sets off the starter cartridge, and the blast from the cartridge spins up the engine. That's how we do it in Brooklyn, those dopes down in Kentucky want to hand-crank, it's no sweat offa MY back.
See that bullet shaped thing on the front of autostart engines? That takes a shotgun cartridge minus the buckshot. You whack on the front of the housing with a hammer, the firing pin sets off the starter cartridge, and the blast from the cartridge spins up the engine. That's how we do it in Brooklyn, those dopes down in Kentucky want to hand-crank, it's no sweat offa MY back.
1. Commence vigorous hand cranking, 2 operators.
2. At IGNITE speed, tachometer indicating 450 to 550 rpm and fuel pressure gage reading 550 lb/sq. in. minimum, open fuel control valve to on position.
3. Continue vigorous cranking to STOP CRANKING speed, 1200 to 1300 rpm indicated on tachometer, from which point the engine will accelerate normally to rated speed.
With engine stabilized at rated speed, oil pressure should be 20 lb/sq. in. minimum and exhaust temperature normal operating range is 600 to 950 deg. F, (315 - 510 deg. C).
Normal running speed is 4430 rpm, speed must not be allowed to fall below 3600 rpm and avoid running at speeds in excess of 4500 rpm.
Shut down sequence to stop engine, allow 2 to 3 minutes running at no load in order that engine may cool down, turn engine fuel control valve to off position.
Note that all tachometer speeds quoted are output shaft speeds, the turbine is actually turning at over 40,000 rpm. The spiral bevel gear in the gearbox is rotated at 9.1 to 1 by the bevel pinion mounted on the end of the turbine rotor shaft. A reversal of this speed reduction by hand cranking, together with the speed increase in the chain and sprocket linkage, allows the operator to crank the engine with an approx. 70 to 1 speed increase. The magneto operates continuously to fire the spark plug whilst cranking and stops when hand cranking is discontinued, the sprag clutch disconnects when the turbine speed exceeds the cranking speed.
04-20-2005 | 09:03 AM
#12
Senior Member
My Feedback: (1)
Joined: Jul 2003
Posts: 1,057
Likes: 0
Received 0 Likes
on
0 Posts
From: SeaTac - Angle Lake, WA
RE: I'm Wondering.
ORIGINAL: Philng
so all in all, it takes a lot of work to start one?
so all in all, it takes a lot of work to start one?
http://www.pstjets.com/download/J600...1%20public.pdf
Cheers,
04-20-2005 | 11:16 AM
#14
Senior Member
My Feedback: (1)
Joined: Jul 2003
Posts: 1,057
Likes: 0
Received 0 Likes
on
0 Posts
From: SeaTac - Angle Lake, WA
RE: I'm Wondering.
ORIGINAL: Philng
thats cool, thanks
thats cool, thanks
Cheers,
