Subject: Rad plenum and cowl design
From: ACRE
Date: 12/1/2004, 8:47 AM

Tom Webber wrote:

You don't need to do that. Just tilt them back at a 20 degree angle.
puts them back under a higher section of the cowl.

Here are the 3D.

Paul Lamar

Paul and Jerry,  in these drawings and everything I've seen pretty much
from anyone, there are four injectors.  Is there a reason we don't use
two injectors, (big injectors to be sure)  or will it not run well IE..
idle etc... Just a question.  T.W.

Has to due with dynamic range and backup. One large injector has a limited
pulse width range over which it can control fuel. the injectors are
staged. Two are used at low power and all four are used at high power.

If one fails it is not catastrophic. I think Tracy's software can detect
that and compensate to a degree.


Paul Lamar
 
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