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Post by racket on Feb 5, 2023 0:32:25 GMT -5
Hi Patty
Yep , theres plenty of options these days :-)
But I don't want to have to make a whole new setup for what could be only a few more spoolups , or spend the money .
I've cobbled together some "bits" and might have another try this afternoon once the weather cools down a tad .
Cheers John
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Post by enginewhisperer on Feb 5, 2023 4:37:47 GMT -5
I seem to recall it was a Camry starter?
I may have a similar one in the shed.
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Post by racket on Feb 5, 2023 15:53:51 GMT -5
Hi Andrew
One was a Camry , the later one I'm not sure about , but my test yesterday didn't end well for the starter I used :-(
Theres a problem with the new comp wheel that is increasing the power needed to get over the hump during spoolup compared to the earlier wheel , I may need to go to a higher powered starter to have a bit of buffer .
I'll have a look around on Ebay etc to see what I can find that can be cobbled together with my current gearbox .
Cheers John
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barnyard
Member
Joined: October 2016
Posts: 36
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Post by barnyard on Feb 5, 2023 17:28:59 GMT -5
This might be a crazy idea, but has anyone tried starting an engine with the compressor intake blocked completely off? With no air flow, the load on the starter should be much less, and I bet it it could reach a higher rpm. The fuel and spark could then be introduced at the same time as airflow allowed. As long as the engine would light at those air speeds there is a chance it could become self sustaining almost instantly. Feel free to poke holes in this idea.
James
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Post by turboron on Feb 5, 2023 21:12:50 GMT -5
James, you would need some airflow, say 1%, to support combustion otherwise this approach would probably work if fully automatic. In other words, trying to do this manually would probably damage the turbine rotor due to excessive temperature. By the way, this approach is used on some plant air centrifugal compressors as flow control due to its low cost.
Thanks, Ron
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Post by madpatty on Feb 7, 2023 10:57:25 GMT -5
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Post by stoffe64 on Feb 7, 2023 13:19:20 GMT -5
A starter from the T312 would maybe work also?,very compact starter!
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Post by turbinenjoe on Feb 7, 2023 14:48:53 GMT -5
Hi, many years ago I built a starter blower out of a 3 kW vacuum cleaner engine and the compressor side of a 65 mm Turbo. I had to rewire the engine to change the direction of rotation. I also have a crude flow chart for it. With the currently installed nozzle it flows 0,08 kg/s (10 lb/min) at a static pressure of about 160 mbar (2 psi).
I don‘t know if it could be strong enough to spool up your engine but I am afraid the biggest problem is that it uses 230V and thus can‘t be used off grid. Best regards Matthias
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Post by racket on Feb 7, 2023 17:21:02 GMT -5
Hi Guys
I've ordered a 2Kw 12V starter which should do the job on 24 volts, the old starter was only 1.4 Kw , a 40% increase in power shouldn't overload my current wiring , solenoid etc
Hopefully I'll only need to just make a new adaptor for the gearbox
Cheers John
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Post by racket on Feb 7, 2023 17:24:13 GMT -5
Hi Matthias
Thats a nice blower , 160 mbar is about what my current starter was able make with the comp wheel without fuel being added , plenty of pressure to get air flowing through all the engine "restrictions "
Cheers John
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Feb 7, 2023 17:58:25 GMT -5
Hi sir, Hoping to see the engine run as usual.
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Post by racket on Feb 10, 2023 19:43:06 GMT -5
Hi Guys New 2 Kw starter installed to replace the old 1.4 Kw unit I was able to modify the old gearbox adaptor to take the larger unit , the bearing size was increased from 30 to 32 mm and the field coil housing was increased by a couple of mms as well , the long securing bolts were able to cope with being a tad out of alignment with the threads in the adaptor . Now all I have to do is wait for a coolish day to do a testrun :-) Cheers John
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slittlewing
Senior Member
Joined: November 2017
Posts: 458
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Post by slittlewing on Feb 11, 2023 9:30:19 GMT -5
Looks meaty John!! Lovely work as usual ☺️
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Post by racket on Feb 14, 2023 20:21:34 GMT -5
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Post by racket on Feb 14, 2023 21:37:12 GMT -5
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