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steve2(at)sover.net
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 Posted: Tue Oct 02, 2007 6:40 am Post subject: Pressure Carburetor? |
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Glad to have all the conversation on the list. Good stuff......
I've mentioned before that we've been running LOP for a number of years.
We finally pulled the right engine last month, 450 or so hours past TBO, after finding some slivers in the oil filter. A couple of the lobes that pull double duty had spalled followers that had begun to nibble at the cam.
The right jugs were still reading 80/80 at 1900 something hours when we pulled the engine.
I know comparing the pressure carb to running an injection system, with GAMI injectors, is a little of an apples to oranges comparison, but if you're able to run LOP, we're satisfied it's beneficial to the engine. at the normal power settings we run. At 75% we're running it on the rich side.
Still, there's too many variables for this to be a good experiment, and it is an anecdotal report. For example, the jugs are never allowed to get real hot, and this must have some to do with the good service we're getting.
Steve
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tylor.hall(at)sbcglobal.n
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| Posted: Tue Oct 02, 2007 7:00 am Post subject: Pressure Carburetor? |
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Team,If we are going to OK next year, we should see about taking a tour of the GAMI plant at Ada, OK and see an engine running on their test stand. I have seen it and it is very educational.
Steve,
Which engine are you running?
Tylor Hall
On Oct 2, 2007, at 8:40 AM, Steve at Col-East wrote:
[quote]Glad to have all the conversation on the list. Good stuff......
I've mentioned before that we've been running LOP for a number of years.
We finally pulled the right engine last month, 450 or so hours past TBO, after finding some slivers in the oil filter. A couple of the lobes that pull double duty had spalled followers that had begun to nibble at the cam.
The right jugs were still reading 80/80 at 1900 something hours when we pulled the engine.
I know comparing the pressure carb to running an injection system, with GAMI injectors, is a little of an apples to oranges comparison, but if you're able to run LOP, we're satisfied it's beneficial to the engine. at the normal power settings we run. At 75% we're running it on the rich side.
Still, there's too many variables for this to be a good experiment, and it is an anecdotal report. For example, the jugs are never allowed to get real hot, and this must have some to do with the good service we're getting.
Steve
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steve2(at)sover.net
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| Posted: Tue Oct 02, 2007 7:28 am Post subject: Pressure Carburetor? |
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Tylor,
We're running just straight IO-540's, narrow deck.
If a trip to GAMI was included, we'd probably try to make it. How about a seminar for the Commander bunch?
Steve
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yourtcfg(at)aol.com
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| Posted: Tue Oct 02, 2007 7:37 am Post subject: Pressure Carburetor? |
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Great explanation, thanks. jb
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dongirod
Joined: 11 Dec 2006
Posts: 140
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| Posted: Tue Oct 02, 2007 9:09 pm Post subject: Pressure Carburetor? |
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Thanks, Milt.
Don
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dongirod
Joined: 11 Dec 2006
Posts: 140
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| Posted: Tue Oct 02, 2007 9:35 pm Post subject: Pressure Carburetor? |
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Thanks, Bob.
Not to start an argument with anyone, but my experience with most things mechanical is, "If you are willing to work at it, sometimes pretty hard, you can do a better job doing it manually than with something automatic" There are exceptions of course like the new A/P used in CAT III landings, but then it takes 3 A/P's to do the job correctly with lots of redundancy. But the automatic procedures sure makes it easier for the ones that don't need or care to work that hard, and they do a good job.
I have never understood all the negative talk about 'geared engines', I flew two seats on the Electra and do remember that there are seventeen systems to prevent Negative Torque (NTSing) with the prop running the engine, so a geared engine was never a big deal for me.
Thanks for sharing your experiences and how you got them. And I second the comment about how we may have different views but we all stay 'civil', very few things that can only be done one way. That is why I feel most people on the list enjoy it, lots of very valuable experience.
As for the tail dragger comments, I am grandfathered, I have a rating in a DC-3, but sure would hate to try and fly one now.
Don
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