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General control line discussion => Open Forum => Topic started by: Chris Fretz on April 02, 2016, 03:06:32 PM
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Hey fellas check out my new Toledo toys! #^ I got a couple "red-headed step children" few LA 40s. I don't really know why n~, probably because they were there and I couldn't find any LA 25s or 46s LL~ I got a Super Combat Streak to mess around with, It has a LA 40 on it %^@ :o What prop would you try with that bad boy? Ohh I got a few props for cheap too #^
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Start with an 11-4 or 11-5 on the 40's. If you want to go faster go to a 10-6 or 9-7. H^^
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While it will work, an LA.40 is about twice the motor a monokoted Combat Streak needs. Most 11X5 props will work very well on the LA.40 though.
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Yes, Wayne, it only Needs an FP 25..... However, it WANTS a Fox Combat Special on case pressure with a Tornado 8-8 and some Missile Mist fuel..... LL~ LL~ ~^
Jim
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While it will work, an LA.40 is about twice the motor a monokoted Combat Streak needs. Most 11X5 props will work very well on the LA.40 though.
I ended taking the 40LA off cause it does seem like a ridiculous amount of motor for that airplane. I just haven't decided what to put on it, I may have a Fox 35 laying around, I do have a old Enya 29 but it's a big clunky RC engine.
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Put the LA40 back on and have fun! If the photo loads, here is a dead-stock LA40 on a Half Fast combat wing (with gear added for operating off pavement). APC 10.5 x 4.5, though 11 x 4 is better choice. Regulate the speed with prop pitch and run it at the rpm it was designed for. The LA40 runs just fine when used as designed. LA46 is better but you don't have one, apparently. Also have stock LA40 in a Smoothie, gives very nice stunt runs with 11 x 4 and run around 10K rpm. If you click on the photo it turns right side up.
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Put the LA40 back on and have fun! If the photo loads, here is a dead-stock LA40 on a Half Fast combat wing (with gear added for operating off pavement). APC 10.5 x 4.5, though 11 x 4 is better choice. Regulate the speed with prop pitch and run it at the rpm it was designed for. The LA40 runs just fine when used as designed. LA46 is better but you don't have one, apparently. Also have stock LA40 in a Smoothie, gives very nice stunt runs with 11 x 4 and run around 10K rpm. If you click on the photo it turns right side up.
I do have 2 LA46's but they are on reserve for two other airplanes. If a 40 is too much then putting a 46 on sounds even crazier :o Maybe I will put it back on it do have like 4 of them now with nothing to use them on. What size venturi are you running?
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Put the LA40 back on and have fun! If the photo loads, here is a dead-stock LA40 on a Half Fast combat wing (with gear added for operating off pavement). APC 10.5 x 4.5, though 11 x 4 is better choice. Regulate the speed with prop pitch and run it at the rpm it was designed for. The LA40 runs just fine when used as designed. LA46 is better but you don't have one, apparently. Also have stock LA40 in a Smoothie, gives very nice stunt runs with 11 x 4 and run around 10K rpm. If you click on the photo it turns right side up.
What kind of muffler is that? An what do you have over the venturi?
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Hi Chris: Not sure of the venturi throat diameter but it is stock LA40S size. That is a Bruline slip-on filter, coarse mesh, that effectively chokes the venturi a bit. It runs about the same without it but it keeps crud out in grass landings with no landing gear. The motor has plastic back plate and stock remote OS NVA. The muffler is a Randy Smith tube muffler, about half the weight as stock muffler and very little restriction while cutting the noise a lot. Also it just looks cool. My other LA 40S (in Smoothie) has metal backplate and Randy Smith (similar to Super Tiger) venturi-mounted NVA, also a good stunt motor with 11-4 prop. I would stick with a modern smooth-running engine like the LA over old-tech engines, unless you like them for nostalgia's sake. Which is totally fine. I tend to agree the LA46 would be a lot of motor for your Streak but, it weighs a bit less than the LA40 and runs even better. Wants a larger prop like 11.5 x 4. All these LA engines want to run in solid 2-stroke, see suggestions from Brett Buck and Randy Smith for running them. Attached is better picture of the Half Fast setup (I know, landing gear on a combat model is weird but I fly off pavement).
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Come on #Liner, don't be like me and a few others I know. You have been told to go with the 40 and try different props. Go have fun. H^^
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Put the LA40 back on and have fun! If the photo loads, here is a dead-stock LA40 on a Half Fast combat wing (with gear added for operating off pavement). APC 10.5 x 4.5, though 11 x 4 is better choice. Regulate the speed with prop pitch and run it at the rpm it was designed for. The LA40 runs just fine when used as designed. LA46 is better but you don't have one, apparently. Also have stock LA40 in a Smoothie, gives very nice stunt runs with 11 x 4 and run around 10K rpm. If you click on the photo it turns right side up.
I'd bet that a Half Fast with an LA40 would be a lot faster than any of the engines available when Mr Netzeband designed the thing. Mine had a K&B greenhead 35 in 1956. I'm sure the LA 40 would rip that performance to pieces!!!
Randy Cuberly
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I am flying a Jerkline Special by Netzband with a OS 35 and if it gets close to 70 mph and that is pushing it. Of course 9-7 prop and 10% fuel like when I was a kid. H^^
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I will have to dig out a yellow nylon Tornado 8x8 from 1965 and see what happens. My reflexes were probably better at age 18 than 68, though. My intent with the Half Fast was to see if I could make it fly a passable stunt pattern at a reasonable speed but answer appears to be "no." Need to take own advice and fly it as designed!
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The last Tornado I used shatteted with a chicken stick. Same thing with some old Top Flite props. Some old timer told me to boil them for 15min. I figured it wasn't worth it to get a prop chunk in the eye.
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Yep, the old nylon props should be used for display only. H^^
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Yep, the old nylon props should be used for display only. H^^
Or mixing epoxy. %^@