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General control line discussion => Open Forum => Topic started by: cory colquhoun on August 02, 2017, 12:36:37 AM
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Bit disappointed how heavy twister finished up at 44 1/4 oz ,will 35 max s still be able to pull it on 60' lines? Thanks cory
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44oz is not a deal breaker but I think you might need a little more power.
If you can get a 46 size engine it should work well IMHO.
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I assumed the 44oz included all the hardware.
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Bit disappointed how heavy twister finished up at 44 1/4 oz ,will 35 max s still be able to pull it on 60' lines? Thanks cory
All-up, ready to fly? That's fine and there are plenty of them built in that range with Foxes and OS-35s that flew OK *if everything else is right*. With a 35S, it won't be a super performer, but based on the other thread, construction quality/accuracy, trim, and getting the engine to run properly still completely swamps things like power/weight and wing loading. Get those right and you will still be far ahead of the field.
Brett
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Bit disappointed how heavy twister finished up at 44 1/4 oz ,will 35 max s still be able to pull it on 60' lines? Thanks cory
As stated, a 44 ounce all-up weight is a tad porky for an old-school 35, but should do. OTOH, a Magnum XLS 36 or Tower 40 would fly the thing great, and a 46LA would work. A "new" 25LA may even work, but I think it'd be marginal.
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FP40 la40 la46 tower 40. Of engines I know. La46 easiest to make work. 35s is down on beans compared to other choices. If you have it try it. Very nice break. Old school. Might have to run 35s kinda hard. Which would mean not much break. My recently demised RD1 weighed a tad more. 35s would not pull it with authority. I switched to a Tower 40. When various bad vibe issues were controlled (sorta) power was a good match.
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Thanks guys will give it a try, yes that is flying weight not fuelled ,I may need to add nose weight yet, which could increase weight yet again ,not sure until it flys, I have an la 46 that I could put in if 35 is not enough, but no harm in giving it a go ,I thought I might be on the borderline power to weight .A good learning curve to keep future projects as light as possible. Thanks cory
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Thanks guys will give it a try, yes that is flying weight not fuelled ,I may need to add nose weight yet, which could increase weight yet again ,not sure until it flys, I have an la 46 that I could put in if 35 is not enough, but no harm in giving it a go ,I thought I might be on the borderline power to weight .A good learning curve to keep future projects as light as possible. Thanks cory
Anything with a 35S will be limited by the fact it is a 4-2 break motor from 40+ years ago, but most people never have any problems with that limit because trim and setup limit it even more.
Brett
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I think 44 ounces is a pretty respectable weight for a modified Twister. Think about all the extra wood you added to the air frame. At that weight, all in and ready to fly, I think a OS .35s will do nicely. I had one in a Nobler that wasn't the lightest one ever built and it was up to the task very capably. When trimming, just play with props to get the engine happy, and line lengths to get the lap time you want and I think you will be happy. You may want to try the RSM 10-6 or BY&O 10-5 and 10-6. I would go with 10-5s and spin it up a bit. People used to use Max-S .35s and Fox .35s back in the day that weighed a lot more! Good luck with it and have fun!
Type at you later,
Dan McEntee
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Thanks guys will give it a try, yes that is flying weight not fuelled ,I may need to add nose weight yet, which could increase weight yet again ,not sure until it flys, I have an la 46 that I could put in if 35 is not enough, but no harm in giving it a go ,I thought I might be on the borderline power to weight .A good learning curve to keep future projects as light as possible. Thanks cory
If you have to add tail weight a LA 46 is a tad bit heavier so might not help matters.
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OH! Fancherized Twister. God I'm slow. I was trying to figure out where you were putting a fan on a Twister, and just not getting anywhere.
I knew the first thing that popped into my head had to be wrong. (Although, I'm still waiting for a stunt version).
(https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/USAF_A-10_Thunderbolt_II_after_taking_on_fuel_over_Afghanistan.jpg/800px-USAF_A-10_Thunderbolt_II_after_taking_on_fuel_over_Afghanistan.jpg)
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Forgot to mention: Due to my flying skills progressing faster than my ability to find building time, I was flying a 54 ounce Fancherized Twister in Expert. I took a break in 2016 because of joint problems, but in 2015 I was breaking 500 points with it. Not super-good -- but not bad for a "stunt trainer".
Fancherized Twister.
54 ounces dry.
46LA pulled it beautifully.
Read Paul Walker's stuff on trimming, follow it religiously, and remember that due to the wing construction you'll be tweaking the flaps all the time.
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It's so friggin' hot here that I thought this would be about oscillating fans. And it's supposed to get worse tomorrow. :P
B.C.'s smoke (from their multiple wildfires) is annoying my eyes and sinuses, but a nice dense overcast does make for (potentially) "Stunt Heaven" for the WCSC this weekend. That is, if the winds stay down and the turbulence is minimal. Meanwhile, Z@@ZZZ Steve
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As for the twister,I had to add over 3 oz of nose weight which made it too heavy for the .35 l have to run it in a 2 stroke for it to perform. With a little modification la40 fitted straight in and with the extra weight cg is fine now, doing 5 sec laps engine giving good runs with small but noticeable break, happy with it flys great
Cory