Commercial Pilots who don't know about piston engines
Join Date: Jul 2007
Location: in the classroom of life
Age: 55
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By the sounds of it being able to run that far LOP it does not need GAMI injectors at all.
And by the way, you do not need the EDM to run LOP......you already are doing sans EDM.
If you look at the logic of it, to run ROP safely you need the EDM more. The opposite of popular myth
If you are unsure give me a call.
And by the way, you do not need the EDM to run LOP......you already are doing sans EDM.
If you look at the logic of it, to run ROP safely you need the EDM more. The opposite of popular myth
If you are unsure give me a call.
I think I wasn't clear. I had the owner install the EDM 8 or 9 years ago. It was most instructive! Before then, I could get it to what I knew was LOP by some amount based on the single point EGT but I had no way of knowing if all cylinders were sufficiently LOP. Also CHT temps were a factor. I can easily see with the EDM whether or not I'm sufficiently LOP. Can't do that with the single point. Based on EDM info I'm pretty confident that sans EDM cyl 3 & 4 on each engine weren't sufficiently LOP. 50 deg LOP on the single point isn't 50 deg LOP for the richest cylinders!
Fuel flow to 50 deg LOP on the single point is about .7-1.0 USG greater than every cylinder at least 50 deg LOP on the EDM.
As an aside, that EDM paid for itself within the 1st year of installation. The plane had a cracked LH #2 injector line that showed in odd temps on the EDM. I could see the temps going awry compared to the other 5 cylinders, even as I enrichened to compensate. I was thinking a return to base might be on the cards. A few minutes later it broke completely (not that I knew the cause at the time, but I could see it was a single cylinder issue) and I shut the engine down.
Because I knew it was a single cylinder problem, and there wasn't a fire, I elected to return to base - saving a lot of $$$ in transport for the pax & myself, finding a local mechanic to fix it, fetching the plane afterwards etc. I roughly estimate that those costs would have been about the purchase price of the EDM. Add in the fuel savings and it's been a no-brainer for the last 8 years or so.
Fuel flow to 50 deg LOP on the single point is about .7-1.0 USG greater than every cylinder at least 50 deg LOP on the EDM.
As an aside, that EDM paid for itself within the 1st year of installation. The plane had a cracked LH #2 injector line that showed in odd temps on the EDM. I could see the temps going awry compared to the other 5 cylinders, even as I enrichened to compensate. I was thinking a return to base might be on the cards. A few minutes later it broke completely (not that I knew the cause at the time, but I could see it was a single cylinder issue) and I shut the engine down.
Because I knew it was a single cylinder problem, and there wasn't a fire, I elected to return to base - saving a lot of $$$ in transport for the pax & myself, finding a local mechanic to fix it, fetching the plane afterwards etc. I roughly estimate that those costs would have been about the purchase price of the EDM. Add in the fuel savings and it's been a no-brainer for the last 8 years or so.
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Join Date: Jun 2010
Location: TinselTown
Age: 45
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so is there an 'enrichment' device on the J2B(D - makes no difference) engines? I'm sure I read it on this thread even... If there is, even full rich at the reduced throttle max continuous power as per POH may not be enough, depending on how it works.
Anyone?
Anyone?
