cebaero
Junior Member
Joined: August 2024
Posts: 52
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Post by cebaero on Aug 16, 2024 13:06:30 GMT -5
An idea for OP for future Big builds, power steering pumps of certain vintages that work more like a pressure washer pump (with some mods, pressure washer pumps themselves can be had relatively cheaply as replacement units but you'll need a lot of fittings) and can be underdriven with relevant electric motors, or if you're lucky, just get an el cheap electric pressure washer and motor controllers to undervolt it. If you want to put in better seals for liquid fuel, it's doable, too, but you won't find much reference material. Viton O-rings work great if you get into the guts. Rather than trying to work up to 200 psi, you need to work Down from about 1750psi. 😁 Makes one hell of a spray pattern with a good hollow cone conical nozzle. I'd have to go digging on old hard drives, but I've got some pictures and grainy cellphone footage of a full pressure spray pattern that's about 6 feet in diameter with a test nozzle, and a retrofit from a J something or other high-low circuit fuel nozzle. (J60 I think, it's been A While). I'd still go hardened hollow cone nozzle with a 5-15 degree pattern if it fits for your combustor size. I tried a 25* and a 60*, the 60 pretty much plastered the outer wall of my combustor and was mostly useless, even with 150psi incoming feed air. That all sounds awesome but Im still such a nooby, Im just trying to get through this one turbocharger turbojet build lol. I'm hoping to be able to use just one 044 pump or maybe hooking two up in a series to get to where I need to be. |
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richardm
Senior Member
Joined: June 2022
Posts: 414
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Post by richardm on Aug 16, 2024 15:07:12 GMT -5
Understood, I'll just try and get it up and running with what I got. In the future, if I wanted more PSI, could I put two 044 pumps into a series for more pressure? I was thinking if I just had the first pump on full power and throttled the second with a PWM this would prevent backflow. Do you think this would work to get me around 200psi?
2 pumps in series will increase pressure but.. All types of pumps have their limitations . It s unlikely that you l get 200 by using 2 pumps that were designed , let s say, for 100 psi each. That's because of internal 'slippage" and most importantly their internal safety bypass.
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