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General control line discussion => Open Forum => Topic started by: Bootlegger on November 20, 2009, 09:06:19 AM
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Seems that I read about props that guy's are using on their OS 46 LA engines and there seemed to be several, now using search I haven't been able to find this info.
Anyone care to share their findings?
Thanks a lot,
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On my LA 46 I am using Zinger 11-5. Tried the one that was recommended at VSC and it didn't work. The P-39 is a heavy plane. Too much finish.
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Thunder Tiger 11x4.5
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Fly-Tec 11-5
Don
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I use what Joe Gilbert is using, find it the best and at a great price for 6. :)
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i tried a lot of different props on my pathfinder with an la 46 and found the thunder tiger 11 x 4.5 to work very well. I just bought some more of these from Randy Smith
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I think it depends on how you are running it. For guys that are going more the 4-2-4 route, it takes one prop but for guys that are running more of a wet 2, it's a different prop. I know up here, the guys that are going the wet 2 route have been using the APC 12.25 x 3.75. Seems to work pretty well.
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This is like some of the threads on this forum. A guy says he is running such and such prop on his plane with a certain engine. Another guy says he is using a different prop on the same make of engine but a different airplane. There are just too many variables to just say use this one prop on this one engine. How many guys are using the venerable Fox .35 Stunt in a ARF Nobler with a Top Flite 10-6 prop and SIG fuel on .015 cable that is 60 feet center of plane to center of the Fancher handle and SIG number 3 plug.
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Mine really likes the APC 12.25 X 3.75 cut down to 11.75
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This is like some of the threads on this forum. A guy says he is running such and such prop on his plane with a certain engine. Another guy says he is using a different prop on the same make of engine but a different airplane. There are just too many variables to just say use this one prop on this one engine. How many guys are using the venerable Fox .35 Stunt in a ARF Nobler with a Top Flite 10-6 prop and SIG fuel on .015 cable that is 60 feet center of plane to center of the Fancher handle and SIG number 3 plug.
I like those numbers.
Always seemed to work well in the dark ages.
So where do I find Top Flite 10-6 power props? I only have 2.
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Doc, you make a good point, one peice of information is invalid by itself,, you need to know the whole packag
I have run many LA 46 engines, some or the airframes, let me think, Brodak P-40 ARF at 54 oz,, my Gee Bee ( based upon a P-40 Brodak wing) 51 oz, a P-40 Q model ( hmm a trend, based on a brodak P-40 ARC at 59 gulp oz, an Oriental at 43 oz, Pat Johnstons Shark 35, ( not sure but really light)
On all of these, the same combo seemed to work very well,
.275 venturi, Powermaster 10 x 22 ( 50% castor 50% synth oil) ST needle valve assem, APC 12.25 x 3.75 prop. Launch about 9600 to 9800 rpm and smile! In all fairness, Pat replicated the APC in wood on his birds but he started with the APC. Its a very solid combination at altitudes from sea level to 2800 feet and temps up to and over 100 degrees. Its my go to prop on any LA 46 setup.
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Gil: I've had really good luck with the Pro Zinger 12 x 5.
Steve
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Thanks guy's that is what I was looking for..
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I use an APC 11.5 x 4 with great effect on my LA .46 Cardinal combo. H^^
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We use an 12-5 cut down to an 11 1/2 power prop on Grandpa's F-14, mostly for ground clearance. On his P-47 we found a 12-6 Powerpoint depitched to 12-5 works great, but we haven't tried APC's on it. That's what we use on LA 46s.
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It's a good point about props in general. I built a plane and had a really good setup. Engine, prop, fuel etc. I built another plane that I thought was pretty much the same as the first (with "improvements", of course). Lifted the whole power train out of the first plane and put it in the second. The prop that worked so well on the first plane just didn't cut it in the second. After some messing around with props, I found one that worked really well and used that. I went back to flying the first plane with the new setup and it didn't work until I restored it to the original setup.
Usually, with a new plane, I take a box with every prop I think has even a slight possibility of working and go through them one at a time until I find the workable ones. then narrow down from there.
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Fly-Tec 11-5
Don
What's a "Fly-Tec" prop, and where are they obtained? Wood, plastic, or CF? Any chance for a picture? ???
I tried Googling for them, with no luck. H^^ Steve
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Doc got it right, it all depends on how you want to run the engine and what suits your combination.
It sounds like a prop around 11 1/2-5 for a 4-2 run works well and a 12 1/4-3 3/4 APC cut down (maybe) for a wet 2 set up are good starting points.
Once you have decided on what type of run you want (might want to try both!) then you can try different *brands*, if it really is a consideration. Expert level flying does demand different experiments that seem to be ongoing, but lower levels may get by with less. As we progress, we learn and we do more (plus we steal more ideas from the better guys! LOL!!).
Mongo
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RSM 11 x 6 - run in "4" stroke (wet 2) mode.
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About time some one asked! The Fly-Tec is a beautiful wood prop made in Germany some years ago. Looks kind of like a Rev-up blade shape. I got mine from some old stock Jerry Nelson had laying around. Would like to get some more of these but have no idea where to look. Anybody from Germany reading this that can help???
Don