http://www.thestrombergspecialist.co...re_secrets.pdf
I found this and wanted to share with those whom may not know about this.
Tony
http://www.thestrombergspecialist.co...re_secrets.pdf
I found this and wanted to share with those whom may not know about this.
Tony
Other articles about the Stromberg carb written by Neal Wright can be found at:
http://www.bowersflybaby.com/tech/engines.htm
Ron Wanttaja
Great Post Ron.
I have talked with many a pilot who state a lot of the Myth's that are talked about on the posting I made. The thing about this. Here I am just showing up on the aviation seen a few years ago and now I am trying to show things like this to the old times whom have been doing this or working on things like this for years. With the attitudes of these folks lets just say...Who the yeck am I telling these people anything.
Attitudes like this are not good, Makes me wonder how they ever learned anything.
Tony
Got a Stromberg on my Fly Baby, been working fine. When I run 100LL, I pull the mixture out full while taxiing. If I forget to push it back in, the runup quickly points out that the Stromberg mixture control DOES work.
I've never used it in flight...most of my flying is done at 3000 MSL or lower. Have fiddled with it, verified, again, that it *does* work.
Only issue I have is the "Stromberg Drool"; a very slow drip from it. I put a pan down to protect the hangar floor. Sure, I should pull the carburetor apart, replace needle and seat, lap them, etc. But it works, now, and I'm loath to mess with it.
Though who knows. At the last condition inspection, the A&P had me sign a statement acknowledging he recommended I replace my 50-year-old mags. He'll probably add a line about the Stromberg next year. Eventually, I'll have a whole disclaimer list....
(Good A&P, though, just a bit skittish about liability).
Ron Wanttaja
I never could get my C-85 to run well on a Stromberg. Finally went with a Marvel-Schebler and am much happier. No stumbles, no rough-running rpm ranges, and much better fuel economy. I rarely fly above 3000 msl, too, but I've gone from 5-6 gph to 2-4 gph! No question, a Stromberg will suffice, I flew with one for years, but in my hands, it's no where near as good as an M-S.
Jeff, I've never had any real problems traceable to the Stromberg on my own C-85. But I do have an RPM range (about 1800 RPM) where things do seem shakier. I always assumed it was a prop issue (metal prop) but after reading your experience, I wonder if the Stromberg doesn't like that RPM....
An old-time EAA member gave me a box 'o Strombergs a few years back, maybe I'd better dig out a carb or two of the right model.
Ron Wanttaja
I fly a '46 Piper J3 Cub with a C-90 engine. The plane does NOT have a mixture control at all, there is no knob on the dash and no cable to pull. It has a Stromberg carb. I don't know if it has any kind of mixture control plate or lever on the carb itself, only that I don't adjust the mixture.
It starts fine, mostly on the first pull if cold, sometimes may take more if it has been run. It idles fine, slow maybe 500 rpm and runs fine, but there is no accelerator pump on the carb so I have to move the throttle slowly , not jam it open or closed.
I live at 7800 feet and have flown the plane as high as 14,000 and as low as 5000 with no mixture change and it seems to run fine, not much power left at 14k but it will go there.
Bill where do you live? I have lived at 9700' in summit county Colorado. I can not imagine flying an airplane to 14,000'. I just watched a show on aviators about high flying and oxygen deprivation, this would worry me at those altitudes you have flown at.
What size prop do you use at that altitude?
Tony
Hi Ron,Originally Posted by rwanttaja
I consistently had rough running between 2150-2250 rpm until I switched to the M-S. I'd also used other Stromberg carbs, but they had their own problems. By and large I was OK with the Stromberg, but I'll never go back now that I'm able to more carefully set the mixture. Heck, I've had severely flights where I've only burned 2 gph! (And yes, I have CHT probes on all 4 cylinders).
Thanks for the article, I saved it for later when I have more time to read it, although I may already have it in my papers I keep for my Champ.
I've never really had any problems with my Stromberg on my A-75 on the Champ. It will leak after shutdown if I don't turn the fuel off and run the float bowl down for about 30 seconds before shutting off the mags. I've read all I could find years ago about lapping the needle and seat and just couldn't get it to stop dripping after shutdown.
Other than that, it's a great little carb, and yes, my mixture is safety wired full rich. I always seem to burn 4.2 gallons per hour at 2300rpm.
Thanks for posting the article.
Jim
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