yl5295
Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline
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Ace,
There are two different modes to accomodate the situation you describe (which I doubt would ever happen... If you could reproduce it and send me a video of it I would like to see it and could probably fix it). However, here is how to setup the TwinSync for a C-337.
Option 1 : Mode 2 - Independant run up mode.
In this mode of operation you can have a 3 position switch controlling which (or both) engines the stick in controlling. Center is both engines are controlled by the stick and are sync'ed. If down one engine is idled and other engine is controlled by the stick. If up the reverse where the other engine is idled and other controlled by stick.
Option 2: Mode 3 - Aux Channel defeat.
This is for a two position switch on aux channel. Up sync unit is working. Switch down the Sync unit becomes a "y" cable.
I plan on adding a mode 7 at some point which will allow seperate channels for each throttle so you can handle it in transmitter programming, curves, switches, sliders, etc for those who like to punish themselves.
The bottom line is there are going to be extreme cases where it may not do the perfect thing. Bottom line is it is better than a "Y" cable and the sound is why we all want it and I built it. Secondly, if you are flying a plane that is not stable on one engine you want matched thrust with engine problems when you may not hear the problem. I did not feel comfortable flying my C310 at a busy field without it - again why I built it.
With that said.... I crashed a 95" P-38 yesterday with it due to pilot error. Not because it didn't save me - but because I got too slow trying to make it back to the field on one engine with a tail wind rather than putting it down in the rough stuff. An engine died at full power mid field at 100' and it immediately idled the other.
I was the one that added power and tried to make it home rather than putting it down in the weeds. It did everything right. If I had designed the device to force me to deadstick, that airplane would not be in the trash can beside my house (and major damage to both engines - not a cheap crash - buy more Twinsyncs!). Maybe that should be a mode to remove the temptation to throttle up on one engine.
I guess someone could write a computer program where you enter your model, wing span, engines, loading, engine spacing, props, nitro, etc and it sets up the device. Ace - are you interested in doing that... now that would be a great contribution... (I vote for if model = P38 and one dies don't let the pilot throttle up the running engine. Force him to land where ever he can. If model = DC38 then become a "Y" cable, if model = 337 then etc. etc...).
Bill
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RE: Eletronic engine syncronizer **SUPPORT ** - 
