The never ending engine thread, East-West - Page 970 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-17-2014, 11:52 AM   #9691
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Re: The never ending engine thread, East-West


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Explanation removed...

Wrong thread, sorry.
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Old 05-17-2014, 11:54 AM   #9692
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Re: The never ending engine thread, East-West

I gonna try to upload the Walbro file I have, I sense a whammy commin'!

Nope file is too large (unless I zip it).

The Butterfly is NEVER closed, if you want to keep the engine running. Depending on the context he asked the question, he'd get different answers.

One thing I am certain about (and I have seen it in action) is most city slickers with limited experience will in all likelihood screw up the settings and occasionally an engine.

Last edited by Eye Can Fly; 05-17-2014 at 12:01 PM.
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Old 05-17-2014, 12:09 PM   #9693
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Re: The never ending engine thread, East-West

Quote:
Originally Posted by Eye Can Fly View Post
I gonna try to upload the Walbro file I have, I sense a whammy commin'!

Nope file is too large (unless I zip it).

The Butterfly is NEVER closed, if you want to keep the engine running. Depending on the context he asked the question, he'd get different answers.

One thing I am certain about (and I have seen it in action) is most city slickers with limited experience will in all likelihood screw up the settings and occasionally an engine.
Guys no setup or whammy coming! I am not an engine guy!

I have at least 5-6 walbro service manuals and doc on walbro theory. Lot of stuff about hi/lo flow ratio, etc...

I have not found one reference that shows graph or general relationship of fuel rate vs carb throttle position. Would have thought this would have been easy to find!

I am a sensor guy!

If there is some reasonable relationship between throttle position on carb, I can use thr servo position signal, to calc carb thr pos, and estimate fuel. Integrated over time, I can estimate fuel consumption.

That's where this started! Maybe just totalizer on rpm is better, each stroke should draw approximately the same air and fuel. Or maybe combo of both.

No setup. Just looking to gurus for basic info that I don't have or able to find!
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Old 05-17-2014, 12:09 PM   #9694
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Re: The never ending engine thread, East-West

It is far from being linear as power output is about 80% by the time the arm is at half throttle.
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Old 05-17-2014, 03:22 PM   #9695
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Re: The never ending engine thread, East-West

John.. I don't think that's an easy one to answer.... I'd think the best would be a totalizer on rpm, but even that'll need some trial and error and some averaging over different flying routines to get something close.
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Old 05-17-2014, 03:34 PM   #9696
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Re: The never ending engine thread, East-West

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John.. I don't think that's an easy one to answer.... I'd think the best would be a totalizer on rpm, but even that'll need some trial and error and some averaging over different flying routines to get something close.
For sure there is going to be some "fudge factor" involved. Leaning towards totalizer and see how it matches fuel used over a some flights.
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Old 05-17-2014, 08:01 PM   #9697
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Re: The never ending engine thread, East-West

Well after almost 15 months since it got to my door test flight was today between working away selling one house buying another and the ensuing renovation it got some air time today 2 quick shake down flights seems a little tail heavy needs more aileron throw engine need adjustment changed with cowl on
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Old 05-17-2014, 08:24 PM   #9698
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Re: The never ending engine thread, East-West

So with that brick of a motor (evolution 116)randy it was still tail heavy.
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Old 05-18-2014, 08:52 PM   #9699
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Re: The never ending engine thread, East-West

Great day of flying. Flew both gp engines today.. the 176 from Dale ran fantastic. At a little over 1/2 throttle the sukhoi just kept going up. My new 61 is getting the needles tweaked. great idle. very strong top end just a little rough in the middle. Tomorrow I think is a good day to bring a couple 3ws to the field.
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Old 05-18-2014, 09:19 PM   #9700
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Re: The never ending engine thread, East-West

I bought a da50 just sayin
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