|
|
Ed,
After recent events, I've been looking at T04 turbo's but I really don't
know what the A/r ratio is, or what are the advantages to a low ratio vs. a
high ratio. I also noticed that most of those turbos are only oil cooled,
while the stock turbo has both oil and water feeds to it.
I would think that for aircraft use, you would need water cooling as well.
Steve Brooks
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ed Anderson
Sent: Friday, July 09, 2004 6:30 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Turbo post mortem
If he is using the stock Mazda turbocharger, I believe he can get that kind
of boost at altitude. The stock turbine out-let area is really inadequate
for the amount of exhaust gas mass flow you can get at WOT. They have had
continuos problems with boost creep on the Rx-7 (at least some model years)
due to this. So with the effective A/r of the turbo that small, 38" is
probably attainable where it wouldn't be with a turbine housing sized for
aircraft use.
I personally believe getting the stock turbo modified as offered by the
Aussies at this URL overcomes some of the limitations of the stock turbo for
aircraft use as I see them. Of course going to some of the T4/T3 series
turbos can do the same as they have turbine housings with A/rs ranging from
around 0.4 to over 1.2.
http://www.turbonetics.com.au/ATS_p&s_12a_13b.htm
Ed
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "Michael D. Callahan" <micallahan@worldnet.att.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, July 09, 2004 1:14 AM
Subject: [FlyRotary] Re: Turbo post mortem
> Hard to put out 38" at 11.5K with the gate wide open;-) I want an intake
> like HIS if he can do that! Mike C.
>
>
> > That doesn't sound right. How big is the wastegate, and what style (ie,
> > throttle plate or Delta-gate (or Race-gate)? With the wastegate fully
> open
> > the majority of the exhaust should be bypassing the turbo. Or am I
> > misunderstanding your comment? WOuldn't be the first time. <g>
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
>
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
|
|