Building a scale 1/4 scale Super Cub from Balsa J3 kit
03-14-2015, 05:43 PM
#1077
My Feedback: (6)
Leroy
The biggest thing for me was reading the history and evolution of the super cub my friend has one and it is the A model with the hi H/P engine and was originally designed as a flat back for crop dusting. single seat but was never used as such so rear seat and controls were added before he got it. I am going to try to get over to his hanger and have a look maybe some pic's to see if I will use his as a model One more thing his has thuse little tab's along the upper surface (cant remember the name it the moment) and he says you can not force it to spin to the right but it will do a sloppy one to the left.
For me it was some vary interesting info
Cheers Bob T
The biggest thing for me was reading the history and evolution of the super cub my friend has one and it is the A model with the hi H/P engine and was originally designed as a flat back for crop dusting. single seat but was never used as such so rear seat and controls were added before he got it. I am going to try to get over to his hanger and have a look maybe some pic's to see if I will use his as a model One more thing his has thuse little tab's along the upper surface (cant remember the name it the moment) and he says you can not force it to spin to the right but it will do a sloppy one to the left.
For me it was some vary interesting info
Cheers Bob T
03-14-2015, 06:26 PM
#1078
Bob, I think what you're referring to are "vortex generators"... they are placed on the upper wing surface back of the leading edge a few inches... they also have some on the horizontal stab... greatly reduce the stall speed if they're put in the right place.
John M,
John M,
03-15-2015, 01:28 AM
#1080
Well vortex generators improve lift at lower airspeed, reducing the over all stall speed of the aircraft... leading edge slots improve lift as well.
Here's some VG's on a super cub
By the time I came to cover my j3 cub originally, they had already stopped making the super coverite... at the time it was still available while quantities lasted... then some sold it on ebay... so I ended up using the coverite 21st century "pre-finished" fabric... it was easy to use, and at the time that's all I cared about... the coverite 21st century fabric had a application temp between 225-290°F... the super coverite worked with a slightly higher temperature.... after you get your test piece covered with the super coverite, put it out in the sun for a couple days to see if is sags any in the open bay areas... if it does, then raise the temp a little more and re-shrink it.
John M,
Here's some VG's on a super cub
By the time I came to cover my j3 cub originally, they had already stopped making the super coverite... at the time it was still available while quantities lasted... then some sold it on ebay... so I ended up using the coverite 21st century "pre-finished" fabric... it was easy to use, and at the time that's all I cared about... the coverite 21st century fabric had a application temp between 225-290°F... the super coverite worked with a slightly higher temperature.... after you get your test piece covered with the super coverite, put it out in the sun for a couple days to see if is sags any in the open bay areas... if it does, then raise the temp a little more and re-shrink it.
John M,
03-15-2015, 01:18 PM
#1082
Nice looking super cub Leroy... something about yellow and black that just looks right 
I see the VG's on the underside of the stab... those improve the elevator response at lower airspeeds... but Like you say, on a model, it wouldn't have much effect, but it would look good... I had thought about making some and sticking them on my H9 SC, just to see what would happen, but I'm a bit chicken
, its the only thing I got to fly right now, except my inlaw's H9 j3, and he doesn't like sharing stick time with me... they fly alright, but I'd rather fly something I built... I will never buy another ARF !
John M,
I see the VG's on the underside of the stab... those improve the elevator response at lower airspeeds... but Like you say, on a model, it wouldn't have much effect, but it would look good... I had thought about making some and sticking them on my H9 SC, just to see what would happen, but I'm a bit chicken
, its the only thing I got to fly right now, except my inlaw's H9 j3, and he doesn't like sharing stick time with me... they fly alright, but I'd rather fly something I built... I will never buy another ARF !John M,
03-16-2015, 05:10 AM
#1086
My Feedback: (6)
Leroy and Jhon_m A short story
My frind tells me he has the V/G's on the wings but not on the horizontal, and I have never looked or noticed. Our club field is out in the country a bit and our long runway is 750 ft. long and he will fly over and we all land then he will put it down on the runway and only use about 450, but when he has to take off we push the tail right up to the trees and when he goes he is off at about the 550 mark ( this is when he alone)
Cheers Bob
My frind tells me he has the V/G's on the wings but not on the horizontal, and I have never looked or noticed. Our club field is out in the country a bit and our long runway is 750 ft. long and he will fly over and we all land then he will put it down on the runway and only use about 450, but when he has to take off we push the tail right up to the trees and when he goes he is off at about the 550 mark ( this is when he alone)
Cheers Bob
03-16-2015, 05:18 AM
#1087
My Feedback: (6)
[QUOTE=Leroy Gardner;
Bob T you have 8 years on me and my memory has lost some of it's instant recall, it's no big thing, I'm not going to worry about it until I can't find my way back home, I guess the next bad thing would be not knowing who to call. I can only hope that doesn't happen to any of us and I'm not going to worry about things I can't control, don't you either.
Leroy[/QUOTE]
For me the memory thing has just come on in the last 2/3 years and from what I have been told it is the ageing process. I feel as long as I can fly and build I am good, God has to take care of the rest
Cheers bob T
Bob T you have 8 years on me and my memory has lost some of it's instant recall, it's no big thing, I'm not going to worry about it until I can't find my way back home, I guess the next bad thing would be not knowing who to call. I can only hope that doesn't happen to any of us and I'm not going to worry about things I can't control, don't you either.
Leroy[/QUOTE]
For me the memory thing has just come on in the last 2/3 years and from what I have been told it is the ageing process. I feel as long as I can fly and build I am good, God has to take care of the rest
Cheers bob T
03-16-2015, 01:45 PM
#1088
rt3232, at our field we could probably land and takeoff a full sized cub setup for STOL, or any light GA STOL aircraft for that matter... but we are right in the flight path for Van Nuys airport...I don't think the tower would allow it.
Back when I was a kid, there was a incident where a small RC plane went through the windshield of a cessna 150 that was on it's final approach... but with the windshield blown out, there was too much drag and the pilot was force to land in the adjacent farm field... the field had just been freshly plowed, and as soon as the 150 touched down the nose wheel dug into the plowed dirt and abruptly flipped... several people ran over to help; the pilot wasn't badly injured, just minor cuts and bruises... I could barely walk across the plowed field because the mud packed onto the bottoms of my shoes; there must have been at least 10 pounds of it... I remember I could barely lift my feet it was so heavy... since then we were restricted to 250 ft max altitude... but that was raised to 400 ft now.... go above that and airport police will be paying a visit... ask me how I know
... I had a dynaflite wonderer glider, that I put a power pod on with a Tee Dee 051... a couple times I went well beyond the the 400 foot limit, and both times I meet with airport police, the second time wasn't as pleasant, I was sent a letter from the club committee admonishing me, and if I did it again I would loose my membership... that little wonderer flew quite well with that power pod, even when restricted to 400 ft. 
John M,
Back when I was a kid, there was a incident where a small RC plane went through the windshield of a cessna 150 that was on it's final approach... but with the windshield blown out, there was too much drag and the pilot was force to land in the adjacent farm field... the field had just been freshly plowed, and as soon as the 150 touched down the nose wheel dug into the plowed dirt and abruptly flipped... several people ran over to help; the pilot wasn't badly injured, just minor cuts and bruises... I could barely walk across the plowed field because the mud packed onto the bottoms of my shoes; there must have been at least 10 pounds of it... I remember I could barely lift my feet it was so heavy... since then we were restricted to 250 ft max altitude... but that was raised to 400 ft now.... go above that and airport police will be paying a visit... ask me how I know
... I had a dynaflite wonderer glider, that I put a power pod on with a Tee Dee 051... a couple times I went well beyond the the 400 foot limit, and both times I meet with airport police, the second time wasn't as pleasant, I was sent a letter from the club committee admonishing me, and if I did it again I would loose my membership... that little wonderer flew quite well with that power pod, even when restricted to 400 ft. John M,
Last edited by John_M_; 03-16-2015 at 05:38 PM.
03-16-2015, 08:24 PM
#1090
It looks similar to natural solartex from what I can see of those images... I don't know what super coverite feels like, but the natural solartex has a coating that makes it feel a little stiff... its a shame they stopped making the super coverite, it was very popular, but from what I was told, the global EPA agencies had a lot to do with it.
John M,
John M,
Last edited by John_M_; 03-17-2015 at 11:52 AM. Reason: Clarification
03-17-2015, 07:27 AM
#1092
I think its more than just environment concerns probably more of a monetary issue. If Super Coverite can be manufactured and sold successfully there is no reason not to believe Solartex couldn't tweak their formula and still be cranking out the product. Its easy too easy blame government for everything these days. A case in point we blame the government for the illegal immigrant problem but all we have to do is make it too expensive to hire illegals but the very people yelling the loudest about the problem will say you can't have the government do that because it will hurt business and cost jobs.
03-17-2015, 09:22 AM
#1095
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Leroy, Chill out! Some of us are very interested in this build thread, and are getting a lot out of it. Press on, regardless. Thanks for all the great info. John R.
03-17-2015, 10:46 AM
#1096
Leroy chill out man you going to give yourself a stroke!
This is a democracy, there are people out there that don't now and will never agree with your opinions, This is the cornerstone on which this country was founded and makes us the envy of the world to this day! Your opinion carries as much weight as everyone else but not any more than anyone else. If everyone agreed on their views and opinions we would have no need of political parties and never any gridlock in our legislative bodies. We both know the chance of that ever happening is about as good as Karl Marx being right and we know how that worked out or should I say didn't work out? For that matter if we agreed with one another on everything this and every build would all look a like and be rather boring.
This is a democracy, there are people out there that don't now and will never agree with your opinions, This is the cornerstone on which this country was founded and makes us the envy of the world to this day! Your opinion carries as much weight as everyone else but not any more than anyone else. If everyone agreed on their views and opinions we would have no need of political parties and never any gridlock in our legislative bodies. We both know the chance of that ever happening is about as good as Karl Marx being right and we know how that worked out or should I say didn't work out? For that matter if we agreed with one another on everything this and every build would all look a like and be rather boring.
Last edited by FlyerInOKC; 03-17-2015 at 10:48 AM.
03-17-2015, 11:43 AM
#1099
I think its more than just environment concerns probably more of a monetary issue. If Super Coverite can be manufactured and sold successfully there is no reason not to believe Solartex couldn't tweak their formula and still be cranking out the product. Its easy too easy blame government for everything these days. A case in point we blame the government for the illegal immigrant problem but all we have to do is make it too expensive to hire illegals but the very people yelling the loudest about the problem will say you can't have the government do that because it will hurt business and cost jobs.
Well if I'm understanding you correctly, something got misconstrued in my response expressing my observation between "super coverite" and solartex.
Let me clarify... Solarfim is still making the natural solartex... it was the super coverite they stopped manufacturing... it's my understanding that solarfilm makes the coverite brand products line for coverite.... my inlaw had made an inquire to the fellows over at solarfilm about their solartex to find out the do's and dont's on how to finish it... it was during their correspondence, they mentioned the EPA restrictions on the chemicles used to manufacture certain product lines... for instance the reason why their cub yellow solartex is a bit on the transparent side, was due to they were forced to use organic pigments and with certain colors the organic pigments were not 100% opaque... thats when the discussion went further and solarfilm mentioned that they make the 21st century fabric for coverite, and that the 21st century fabric replaced the super coverite.
The thing that pisses me off about this whole EPA crap is, and I told my inlaw the same thing is, the EPA go crazy over a few pints of paint that spill in a cargo hold of a ship or aircraft, banning certain chemicals from being shipped, or placing a huge hazardous waste surcharge on shipments, so Hi one couldn't afford it... but BP can buy their way out of several billion gallons of crud oil that they spilled in the gulf of mexico... its a dirty business... mother nature does more harm to the environment every time she blows a volcano.
John M,
Last edited by John_M_; 03-17-2015 at 11:48 AM.
03-17-2015, 11:58 AM
#1100
I have a member of my church that worked on the state level of the EPA and the problem is the agency takes a company to court and if they are lucky they get one state employed attorney who knows what he/she is doing and the company comes in with a dozen lawyers wearing suits costing more than what the state's attorney makes a year. The deck is stacked against the enforcement agencies against companies with deep pockets. A case in point under FDA guidelines Diet Coke can't legally be called a diet drink but the fines are so low compared to what Coca-Cola makes its cheaper to pay the fine than come into compliance and in the meantime people keep buying it as fast as they can make it.