Building a scale 1/4 scale Super Cub from Balsa J3 kit
01-20-2015, 10:45 AM
#626
Join Date: May 2003
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Here we go again, time for some of you to go back to post # 534 and read the first line. I'm going to try and be nice about this and ask that this off subject sea plane line go some where else. It's enough just trying to keep the CUB build alive, I don't need the other on it, Show some respect and we will all get along fine.
Leroy
Leroy
01-23-2015, 07:35 AM
#628
Leroy Gardner 
[HR][/HR] Join DateJun 2009LocationCoeurd'Alene, IDPosts1,826GalleryMy Gallery ModelsMy Models RatingsMy Feedback
[HR][/HR] Join DateJun 2009LocationCoeurd'Alene, IDPosts1,826GalleryMy Gallery ModelsMy Models RatingsMy Feedback Some of you don't seam to know this is a Super Cub build site, lets keep it that way, if it dies it dies but with over 15,000 views I doubt that will happen.
I have been looking high and low for a build where someone actually guilt one of these true to scale, never found one and there has been many built. I kinda figured I'd end up doing it my way which isn't a bad way as I'm beginning to see. Just use real plane pictures and go for it.
Ailerons are 25" long and flaps are 17" or there abouts, with two hinges on the flaps and three on the ailerons there is going to be a pretty good spread between them. I don't think I need to worry about that, I'll just build them like the real ones which hold up real well. With some solid custom all brass hinge assemblies that have 4-40 hinge pins I'll be fine there.
This one is for the aileron center hinge and horn combined, the bottom horn will be for the dummy down cable. The end hinges are the same thing and will be embedded in the ailerons/flaps with the aid of a block and epoxy, they are just a straight 1/4" wide bar kept within the structure.
I think this is a good way to go, at least it will look like the real one, I may or may not do the tube stop.
Because of the very short control throws I may end up doing bell cranks in the wings to reduce them, we are talking 1/4" & 5/16" for 3/4" of travel up & down, I have options on the servos arrangement to get what I need.
This is not going to work.
Leroy
I have been looking high and low for a build where someone actually guilt one of these true to scale, never found one and there has been many built. I kinda figured I'd end up doing it my way which isn't a bad way as I'm beginning to see. Just use real plane pictures and go for it.
Ailerons are 25" long and flaps are 17" or there abouts, with two hinges on the flaps and three on the ailerons there is going to be a pretty good spread between them. I don't think I need to worry about that, I'll just build them like the real ones which hold up real well. With some solid custom all brass hinge assemblies that have 4-40 hinge pins I'll be fine there.
Leroy
Leroy Tiger Club # 53, TF 1/5th P-51 mustang
Eagle 2 11, bashed Tiger 60, Spacewalker 11 1/4 scale
P-51 Mustang Brotherhood #28, Sig Brotherhood #12
If it works for you there is still a wrong way
Eagle 2 11, bashed Tiger 60, Spacewalker 11 1/4 scale
P-51 Mustang Brotherhood #28, Sig Brotherhood #12
If it works for you there is still a wrong way
01-23-2015, 08:51 AM
#629
Join Date: Sep 2006
Location: The Sunshine state, when it's not raining!
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Why can't you make a small pulley for the servo and run cable pull-pull. Doing such would require much more travel from the servo. Or buy one like in the pic, eight bucks.
Last edited by acerc; 01-23-2015 at 08:59 AM.
01-23-2015, 10:20 AM
#635
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A pulley like the one shown requires more travel to loop the wire around itself therefore requires more servo travel. I can't find my pic of one I did or I would have posted it. But I will try to explain how, the aileron has a top and bottom link for the control horn, hook the bottom to one channel of the pulley and the top to the other channel from the opposite side. The pulley has small holes in each channel for the wire to feed through so a termination block can be added, I swage a sleeve on the end. Center the servo and attach the wire to the aileron control horn, both sides, this part can be made to look real scale with thimbles and sleeve's. If you place the servo far enough away from the trailing edge you can also put a turnbuckle on each side internally to adjust the wires with. If this explanation is insufficient I can make a drawing by hand and post it.
01-23-2015, 10:34 AM
#638
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Here, not pretty but you get the idea. This type set-up requires a lot more servo travel. I will be building a scale L-4 from Cubmans plans and these are the way I do the ailerons, I have done it before and it works great and looks scale. Most Cubs have turnbuckles on the outside and they can be added for function and realism. Proctor-Enterprises has some nice turnbuckles, here is the smallest one at 3/4", http://www.proctor-enterprises.com/p...rnbuckle-w.jpg.
Last edited by acerc; 01-23-2015 at 10:42 AM.
01-23-2015, 01:33 PM
#644
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No more pulleys would be needed if the wires crossed over, bottom to top and top to bottom, only a small piece of hard plastic to keep them from rubbing together.
01-24-2015, 06:01 AM
#647
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I finished my last shingle pill, hope it was enough to kill this crap, also got the control and mounting hinge lugs in the ailerons (presently setting up) will cap them off tomorrow and work on hinge blocks and servo mounts in the wings. I'm getting close to mounting the wings to locate the strut and jury strut ply mounts and don't forget the wing tips, still plenty to do
Leroy
Leroy
The nurse said that I had the shingles and that I had gone through the biggest part of it 'like a grown man'! It was almost over and she said that there was nothing else she could do but give me some pain pills for about four days and then it was gone! Man! If I had known that I could have had about two weeks of pain pills! hehe! BZZZZZZZZZZZZ!
I couldn't believe that I had endured the shingles for some two weeks! Talk about a bone head! I'm really glad it didn't turn out like some of those pictures on TV with the really bad open wounds. I woulda looked like a 'meat head'. hehe!
bird.
01-24-2015, 02:10 PM
#648
My Feedback: (6)
Both of you guys are lucky, as I had an uncle years back that died from them, had tem on his shoulders and down his back, the doc's had him on something and one nite some of the blisters popped and he bled out in his sleep.
So if you have any re'accuering signs get help quick and I thank God no one in my lineage has ever had them.
Sorry for the gross story
Cheers Bob T
So if you have any re'accuering signs get help quick and I thank God no one in my lineage has ever had them.
Sorry for the gross story
Cheers Bob T