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Building Tips and technical articles. => 1/2 A building. => Topic started by: Rosie Rosenau on December 26, 2014, 11:40:02 PM
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I was hoping someone has played around d with adding flaps to any of these three planes?
Swordsman 18
Stuntman 23
Jumpin Bean
I was hoping someone can tell me what if any flight improvements?
Tally ho
Rosie
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I was hoping someone has played around with adding flaps to any of these three planes? Swordsman 18, Stuntman 23, Jumpin Bean. I was hoping someone can tell me what if any flight improvements? Tally ho Rosie
The first two have sheet wings and would be an easier do. I'd think though the additional complexity and limited line tension caused by the light weight of the planes in comparison to the larger .10 powered and up planes would have to be nearly frictionless to work successfully (i.e., sewn hinges). Also, the limited wing area coupled with additional drag of wing flaps may have a tendency to stall in maneuvers.
I think it was Dave Platt? who made profile sheet wing planes of around 30" span or slightly greater powered by Tee Dee engines for adequate sport stunt capability, but as far as I know, those were elevator planes.
But I'm certainly no expert in CL stunt design, so what I state is not necessarily fact, just my impressions. If greater stuntability is desired, I'd think a better proportioned plane such as Hal DeBolt's 26" span All American may be a better ticket for .049 flight.
http://outerzone.co.uk/plan_details.asp?ID=347 (http://outerzone.co.uk/plan_details.asp?ID=347)
(http://outerzone.co.uk/images/thumbs/models/347.jpg)
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Those three planes, all of which I have built and flown in the past, are just undersize sport/trainer planes. Flaps might help some but not much. You are better off with a bigger, thicker wing and no flaps. Flaps are great for big stunters but not necessary for smaller models. The mechanics of flaps don't scale down all that well.
I found that a 15-size Clown built light is a good .049 stunter.
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Well now.... Frictionless hinges are something I must be seeing... does anyone have a link as to how to make them? Please let me know what you can. Thanks.
Tally ho
Rosie
By the way thank you for the comments and attached pics.
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Flaps work just fine on 1/2 A models. The Stork, 1/2 A Pathfinder and Pinto all use them just fine. Sewn "figure-eight" hinges are essentially frictionless, as are properly done pinned hinges.
Having said that, the original three models mentioned in this thread are not, and never will be, really good stunters no matter what you do. They are just too small! Powered by a Tee Dee .020 and lightened up a lot, they could do a pattern, but that is really a heroic enterprise compared to just starting with a good design.
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LOL... OK Mr. Renger... I will build them for fun and for the kids to learn on and when I do that I will make some shorter sets of lines. Shorter lines have always given me tighter lines. Right up to 6 ft lines in my mom and dads front yard. Glad mom had her curtains closed in her bedroom. Since both lines snapped at the same time and after the plane "simple beginners shoestring racer" ;hit the smaller wing windows if stopped the plane but the motor mount snapped off with a running black widow.... Until it wrapped up in the curtain tumbleing and burpping all the way to the floor. Wow mom sure woke up fast from her nap.
I was expecting the answers I got. If I ever wanted them for improved flight I would modify the wing to a full ribbed for any real improvement and I know it will not do the patteren nor make squared corners. But better loops and and good stunt capabilities. I say this with a known history of making 3 Swordsmans with jump in bean wings in swordsmans wing out line.
I will strip the parachute hinges off my stork and I did a general Google search for how to do figure 8 sewn hinges. I may switch out the pushrod from flap to elevator out with a threaded one. I will try to add pics. Lately the cell phone seems to be set to mega huge clear pic setting and go over the 1000 limits.
Thanks team I really appreciate your help on these questions.
Tally ho
Rosie
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What are "parachute hinges"?
Also do a search on "Baby Super Clown" for info on adding flaps and thread hinging.
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Those three planes, all of which I have built and flown in the past, are just undersize sport/trainer planes. Flaps might help some but not much. You are better off with a bigger, thicker wing and no flaps. Flaps are great for big stunters but not necessary for smaller models. The mechanics of flaps don't scale down all that well.
I found that a 15-size Clown built light is a good .049 stunter.
Yup, at 200 sq.in. it is an excellent size for .049 power!
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Parachute hinges are truly cloth hinges but I have a small supply of actual military repair materiel.Hence the nickname of parachute hinges. The material was the thinnest I could find and took super glue to wood well and left a very smooth finish. Wish I could find a cheap 1/2a combat kit source. I guess I will just have to make my case of lil hackers up. Now I will start a new subject. So yes it will be 1/2A and electric... Go figure that coming from me... LOL
Tally ho
Rosie