You are right Ed. So I'll use this setup running HP air to dial in the
data ack hardware and I'll get busy putting together an engine test bed
for spinning up the turbine.
The choke flow you mentioned will indeed come into play.
So a running engine should supply the turbine.
I plan on using bigger turbines in the future and higher HP test in the
60-80 HP range so in order to keep the rpm's lower on the test engine it
should be the biggest engine I can find.
So I'll go to the junkyard and find a 500 CID Cadillac engine. I might
settle for a 460 CID Ford if I can't find that.
I've built engine test stands before and I know I won't want solid
mounts for the engine and I'll have to come up with and exhaust system
and wastegate that will work for various turbochargers.
I'll need a wastgate I can control and a dump valve.
I'll need some microprocessor control as well to avoid turbine overspeed
as a safety measure.
Doing this should be fun for me actually just like old times :)
-------- Original Message --------
Subject: [AR] Re: Turbopump prime mover
From: Ed LeBouthillier <codemonky@xxxxxxxxxxxxx>
Date: Thu, December 03, 2015 1:50 pm
To: arocket@xxxxxxxxxxxxx
over
The main reason I don't want to use a combustion/turbine such as the
ones made from turbochargers.
If your using the compressor/turbine you have to go turboshaft and I've
played with one of these combustion/turbines and they are far from
reliable.
Well to get upwards of 30 HP, you're going to need to come
up with something original.
There was a fella by the name of Nye I corresponded with while he was
developing one of the first of these (back in the 90's) and they just
don't run very well nor are they reliable enough.
Probably true.