I just took the flame tube out and inpected it. It seams as if the flame is
traveling to far twards the turbine side. I think I will make another injector
like you said that sprays around insted of striaght in. I dont want to make too
many changes at once. I will just try one thing at a time!

http://www.youtube.com/watch?v=NitQ9Y7StUU

--- In DIYGasTurbines@yahoogroups.com, "John WALLIS \(Racketmotorman\)"
<racketmotorman@...> wrote:
>
> Hi Ken
>
> 2.5"inducer gives us 4.9 sq inches , we need ~3 times inducer area for our
flametube crossection , so ~14.7 sq ins , or ~4.3 inch ID as a minimum diameter
, preferably 5 inches to make it simpler to get good combustion first time .
>
> With a 2.5 inch inducer you probably have an exducer of say ~3.3 inches , so
your 99, 999 rpm tach should be just enough ...................but please check
the comp dia and do the calcs so that you don't exceed that 1450 ft/sec limit
:-)
>
> Cheers
> John
>
> ----- Original Message -----
> From: sswhuevos@...
> To: DIYGasTurbines@yahoogroups.com
> Sent: Friday, January 27, 2012 7:55 AM
> Subject: Re: [DIYGasTurbines] Re: Boost pressures and EGTs
>
>
>
> I'm going to do some work on it tonight. I haven't taken the flame tube out
yet to inspect how it is burning. Thanks for the info on the injector.
>
> The inlet on the turbo is 2.5 inches. I used that measurement to calculate
flame tube specs roughly.
>
> Ken
>
> Sent on the Sprint® Now Network from my BlackBerry®
>
> ------------------------------------------------------------------------------
>
> From: "John WALLIS \(Racketmotorman\)" <racketmotorman@...>
> Sender: DIYGasTurbines@yahoogroups.com
> Date: Fri, 27 Jan 2012 07:51:21 +1000
> To: <DIYGasTurbines@yahoogroups.com>
> ReplyTo: DIYGasTurbines@yahoogroups.com
> Subject: Re: [DIYGasTurbines] Re: Boost pressures and EGTs
>
>
>
>
> Hi Ken
>
> The rpm limit will depend on the wheel diameter as the Group has an upper
tip speed limit of 1450 ft/sec for safety reasons , so measure your compressor
wheel diameter , put the number into Jetspecs Turbo Analysis and it will give
you a rpm limit for your engine .
>
> Cheers
> John
>
>
> ----- Original Message -----
> From: sswhuevos@...
> To: DIYGasTurbines@yahoogroups.com
> Sent: Thursday, January 26, 2012 11:46 PM
> Subject: Re: [DIYGasTurbines] Re: Boost pressures and EGTs
>
>
>
> I ordered a tach that goes to 99,999 rpm. It should be here today. What
kind of RPM should I be looking for?
>
> Ken
>
> Sent on the Sprint® Now Network from my BlackBerry®
>
> ----------------------------------------------------------------------------
>
> From: "mot_mole" <jnissen@...>
> Sender: DIYGasTurbines@yahoogroups.com
> Date: Thu, 26 Jan 2012 07:07:54 -0000
> To: <DIYGasTurbines@yahoogroups.com>
> ReplyTo: DIYGasTurbines@yahoogroups.com
> Subject: [DIYGasTurbines] Re: Boost pressures and EGTs
>
>
>
> Ken fairly low T4 temps. DO you have a jet nozzle on it or just a straight
pipe? At 22 to 24 PSI that is really pushing it. Be careful of over revving. Do
you have a tach for it?
>
> Sounds like it's really moving.
>
> --- In DIYGasTurbines@yahoogroups.com, "Ken Herbert" <sswhuevos@> wrote:
> >
> > I put a boost gauge on my gas turbine last weekend and I saw about 22-24
PSI at full throttle running on propane. My EGT at turbine and thrust tube was
about 750-800F. The compressor side was around 1600F. Is this a good place I
need to be?
> >
> > http://www.youtube.com/user/hyprmtr?blend=1&ob=video-mustangbase
> >
> >
> > Ken
> >
>