Bill
I don't think I'm seeing a HP increase with the water injection. I think the water is displacing air so it may decrease HP. I don't have an inner cooler so it's used to lower the intake temperature. I think it provides a greater detonation margin. The single 100cc water injector lowers the temperature to 10-15F over ambient. Don't remember what it is without.
Bobby
Sent from my iPad
Bobby,
When water turns to steam it expands more
than gasoline when it burns. Do you feel you get a power increase from
the water injection greater than just the cooling of the intake charge? Do
you know what the temp of your intake charge is on a hot day at 38 inches?
And how much the water injection cools it?
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent: Sunday, June 07, 2015 10:25
AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: new
operating question
My normal, not in a hurry settings.
38" MP / 7000 rpm for takeoff and initial climb with F/A
12.5-12.0. Cruise climb 5800 rpm 30-32" MP F/A 13.5- 12.5. Preferred
cruise rpm 4800- 5200 At less than 30" MP and F/A 15.8-16.0. Full
throttle. Prop rpm controls engine rpm and super charger bypass controls
MP. A turbo charger and automotive waste gate would likely require throttle
management during high rpm operations.
Super charged Renesis with electric MT prop.
(New Turbo charger and a 20B on the bench- still haven't made a
decision about upgrading the RV10. )
Greetings genlepeople of
the rotary pursuasion,
For those of you using variable pitch
(C/S) props, an operating question that has been bugging me. Perhaps the
collective wisdom of this group can set my mind at rest.
In piston aircraft engines, the concept
of running over squared MP vs RPM has been heavily questioned to the
extent that some suggest running at full throttle all the time and controlling
the power output via RPM (within reason). The thought is to, I believe,
eliminate the induction restriction of the butterfly valve increasing the
efficiency.
Now we have a rotor spinning, a gear box
gearing and a propeller propelling. Does this concept hold true for the
rotaries. What are people doing in terms of setting power after take off (full
throttle max RPM).
My enquiring and rotating mind wants to
know.
(Unturbocharged Renesis with RD1-c Box)
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