). When you disable one = set of injectors, the cpu knows it, and will take the proper action, = which is really a sweet feature.=20 If your in cruise, and all 4 injectors are running, it will double = the fuel pulse to the two injectors that you didn't disable. That way, = you will have normal fuel flow, up to the point where your two injectors = run out of flow. This will still get us into the high cruise range, but = maybe not WOT at sea level. =20 If you're at low throttle, and disable the ones that weren't on = anyway, nothing happens. If you're at low throttle and disable the ones = that were on, it turns the others on instead.=20 Any of that makes sense? Rusty (still working on the single rotor Ebay guy) >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0026_01C552D6.A2E0FD20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Tracy has a schematic in his EC2 = documentation=20 for wiring up the power to the injectors whereby you can do just=20 that. Switch off either primary or secondary (or both if you want = to=20 practice gliding {:>)). I find it very helpful in trouble = shooting and=20 it shows the rotary engine will fly just fine on only two stock Mazda=20 injectors.

Ed A

----- Original Message -----
From:=20 David=20 Staten
To: Rotary motors in = aircraft

Sent: Saturday, May 07, 2005 = 5:33=20 AM

Subject: [FlyRotary] Re: Static = MAP=20 readings?

Something to consider... with a solitary injector = failure you=20 will have mismatched fuel flow to your two rotors, and this will cause = a=20 mismatch in the power produced, and vibration. Some have suggested = being able=20 to toggle pairs of injectors on/off for being able to run smoothly in = this=20 failure mode.

Dave

Russell Duffy wrote:

I was thinking that I = could use two=20 injectors as primaries and the other two as secondaries. I believe = the=20 secondaries kick in above a certain throttle setting? If set = up like=20 that, wouldn't all 4 injectors be working at cruise throttle = settings? =20 If so, if one injector failed, there would still be one injector = spraying=20 fuel into one of the rotor housings, and two spraying fuel into the = other=20 rotor housing, giving me some kind of = redundancy.

Hi=20 Paul,

Just got my DSL and = phone line=20 back. I was having withdrawals :-) =20

You're right about = what you=20 say, but I don't think that half of your fuel will be much better = than=20 none. I'm guessing the rotor would be so lean that it wouldn't = fire=20 anyway.

With Tracy's unit, = you can=20 install disable switches (and if you're smart you will when you're = wiring=20 the EC-2 <g>). When you disable one set of injectors, = the cpu=20 knows it, and will take the proper action, which is really a sweet = feature.=20

If your in cruise, = and all 4=20 injectors are running, it will double the fuel pulse to the two = injectors=20 that you didn't disable. That way, you will have normal fuel = flow, up=20 to the point where your two injectors run out of flow. This = will still=20 get us into the high cruise range, but maybe not WOT at sea = level. =20

If you're at low = throttle, and=20 disable the ones that weren't on anyway, nothing happens. If = you're at=20 low throttle and disable the ones that were on, it turns the others = on=20 instead.

Any of that makes=20 sense?

Rusty (still = working on the=20 single rotor Ebay guy)

>> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html
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