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Post by turbojet atv on Sept 2, 2021 23:39:46 GMT -5
Thanks guys,
I’ll look for a hydraulic pump & a 2x 24v motors to run both of my pumps. Would a 350-500 watt motor be good for both oil & fuel pumps? I’m getting a 2 stage oil pump made to feed both turbos independently instead of using 2 oil pumps.
-Cullen
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Post by racket on Sept 3, 2021 2:01:39 GMT -5
Hi
According to some formula from Renold Hydraulics the power required to drive a hydraulic pump is Kw= Bar X lpm divided by 600 , so lets say 40 Bar/600psi and 2.5 lpm =0.167 Kw 160W , probably double that for "loses" and to not be flogging the motor .
I use a 500W 24V scooter motor running on 12V for my oil pump and it has no problems pumping 70psi and ~10 lpm
Cheers John
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Post by turbojet atv on Sept 5, 2021 2:38:40 GMT -5
Hi guys, I was bored today so I did a thing… I took the tires from my four cylinder and compared it to what I’ve got so far for my jet engine bike. Hahaha what a big difference haha, it’s such a small chassis haha. These are 30x15 paddle tires for dirt track racing. They’re waaay to big for this bike to turn unless I use a big ratio like on my 4 cyl. I use a 13 front & 81 rear sprocket combo. I did this for grins and giggles haha cheers, peace, Cullen ✌️
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Post by turbojet atv on Sept 16, 2021 16:55:00 GMT -5
Hello gents, it’s all coming together now! I got my new welder and things are back on track! I made the funnel to my best abilities today. Funneling 10” down into a 4” “circle”. I need to do more work to perfect it. I’ve got a 6” 90° Elbow to make the intake section and a 3.5” 90° elbow to finish off the charge piping. After that is fuel System and oil system and simple electric stuff and it’s a green light to turn the engine over! more to come! -cullen
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Post by wannabebuilderuk on Sept 17, 2021 13:05:22 GMT -5
Hello gents, it’s all coming together now! I got my new welder and things are back on track! I made the funnel to my best abilities today. Funneling 10” down into a 4” “circle”. I need to do more work to perfect it. I’ve got a 6” 90° Elbow to make the intake section and a 3.5” 90° elbow to finish off the charge piping. After that is fuel System and oil system and simple electric stuff and it’s a green light to turn the engine over! more to come! -cullen Have a look halfway down this page, if you want to improve the elbow you could try this jetandturbineowners.proboards.com/thread/966/hc5a-kart-build?page=2
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Post by turbojet atv on Sept 25, 2021 4:00:24 GMT -5
This is looking very mean! Charge pipe elbows are in the mail and should be here soon so I can finish the engine. I’m cleaning up the welds a little on the header. Trying to make them look “clean” as I did two passes over my first weld to make sure it doesn’t break from the pressure. it’s got good welds so I’m not to worried about the weld breaking but I did two passes just to be sure. -Cullen
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Post by racket on Sept 25, 2021 4:56:38 GMT -5
Hi Cullen
Could you please explain what you have there, is that all "outer can" ??
Where is the flametube mounted ??
Cheers John
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Post by turbojet atv on Sept 25, 2021 14:41:09 GMT -5
Hi John,
That’s just the combination chamber & the 10” to 4” exhaust header going to the turbo. I didn’t show the end cap in this post but it’s got the flame tube welded to it. It slides right into the end of the engine like a glove & it’s supported near the header so it’s not free floating around in the outer can.
I’m not finished with the back end of the engine, I’ve got to drill the holes for the injectors and a spark plug.
-Cullen
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Post by wannabebuilderuk on Sept 25, 2021 16:33:07 GMT -5
Gotta admit I'm impressed Cullen, you managed to turn that mess into a decent elbow and reducer!
Ben
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Post by turbojet atv on Sept 25, 2021 18:58:06 GMT -5
Gotta admit I'm impressed Cullen, you managed to turn that mess into a decent elbow and reducer! Ben Thanks Ben , It’s amazing what a little time & hard work with a welder and grinder can do. I must say, it did turn out very well. It surprised me as well haha. -Cullen
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Post by turbojet atv on Oct 2, 2021 5:47:16 GMT -5
Hi guys,
while testing mock up of the engine as it sits, I found a problem with the amount of space I have to work with. Pretty big problem. On paper, my chassis was able to hold and support the engine but what is working on paper doesn’t always work out on the actual thing.
my engine sits out to far for comfort on my chassis so I’m going to either modify my chassis or rotate the engine 90°. I might turn them sideways going across the chassis since I know I have some room to go that direction.
im going to also put the engines on a rolling stand to r&d the engines. The cart makes it easier to adjust stuff there instead of the tight areas of the chassis. The cart will help me understand the engines and the transmission. That way I can make sure the engine is working flawlessly with the transmission. Afterwards I’ll modify my chassis to fit the engine instead of modify the engine to fit the chassis.
-cullen
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Post by racket on Oct 2, 2021 6:00:38 GMT -5
Hi Cullen
Yeh , the real world generally wins out :-(
But theres always a way around it
Cheers John
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