->> Speaking of nitrous in the 13B, I'm putting my 13BREW back together as a
NA motor, but would like to have nitrous for those real short fields. Don't
think I would ever need it, but it might be nice to have on those rare
occasions. I'd only be interested in getting about 40-50 extra hp. Would
this be a risky proposition-I've heard that nitrous can be really hard on a
rotary, but Ken Welter uses it. I suppose that if there is a controllable
propeller available when I get to that point in my project, the issue of
putting nitrous on my plane will be moot.

Brian Trubee

John Cowpinski wrote:

Brian, I'm with Ken on the virtues and safety of nitrous. One interesting
site is www.nitrous.info with some good background and ideas on building
your own.
Now about nitrous vs psru ratio, one thought is you tune your engine /prop
combination (whatever the ratio) to normally give a max of maybe 6000. Then
design the nitrous setup to give you 65 to 7000. To some extent just use the
ratio to select prop rpm for the diameter you want to run and plan to keep
normal max down.
Aren't you going to get much more additional HP by feeding in more fuel/O2
to boost the rpm than lower gearing to boost it?
John.

 
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