my cub wont take off

[thenameisdame]

can you guys watch the vid and tell me what you think, i had some simple repairs done but its not taking off like my champ would.. it feels like theres not enough power vs weight

www.youtube.com/watch?v=vTMdM_PMc98&feature=youtube_gdata

[kenninny]

looks tail heavy to me

[thenameisdame]

i have the throttle all the way and the tail lift all the way during those attempts

[thenameisdame]

could the batteries in the romote new to be new?

[flydiver]

That's a lousy place to even try to fly. An excellent pilot would have trouble in those kind of confined spaces. You are going to hit something. Hopefully they only thing destroyed will be your Cub.

You cannot overcome lack of power with elevator. If you weren't tail heavy (check it!) then you were too heavy on the elevator for the air speed you didn't have. You cannot make a stock super cub go straight up no matter how hard you yank the elevator. You just make it stall....and then fall.

A stock SC will NEVER take off and fly like a Champ does. They are worlds apart.

If you truly think you are underpowered you should look at some kind of binding or problem in the power plant (previous crash) or a lame battery.

[thenameisdame]

but it has no climb what so ever... i held it stirght up in my hand and lifted out and back into my hand a few times full throttle

whats the process of figuring out what the problem is?

how do i check for its balance..

what steps can i take in order to make it fast stronger

[thenameisdame]

and i prb could fly it in those confines thanks

[flydiver]

Center of gravity (CG) is 2 5/16" inch from the leading edge of the wing.
With a tail repair it's quite possible that the CG is now wrong.

Regarding you flying location- I beg to differ. If you don't know enough to see the problems with your Cub and don't know what to do about them, you don't have enough experience to fly safely in those kind of confines. I can't stop you....but you are going to pay a price and the entire flying community is going to take a hit when you hit something that gets hurt or is expensive.

THIS IS NOT A CHAMP! YOU CAN'T FLY IT IN THAT SPACE!

[thenameisdame]

thanks for telling me about the COG

but im gonna raise a point with the bone you picked.. i appreciate your concern for safety but,


what does fixing a plane and flying one have to do with each other??? so what airplane mechanics can pilot planes now? there two totaly different things..

my plan was to get it over the houses for a couple turns and land it if you must know... but as u can see i couldnt get it in the air.. i asked how to fly it not where to thanks!

[flydiver]

Because I was an idiot once myself and tried to take off and land in a similar looking space, quite unsuccessfully I will openly admit. I could have hurt someone or something. I'm very lucky I did not. It took me almost 24 hours to even find the plane. That was with a plane that is slower and easier to fly than the Cub. I thought I had gotten good enough to not bother going to the field. I could simply fly and land in the street. Uh huh...sure.
That's a.....very.....very.....small.....space. The sky is big, taing off and landing are small. Keep trying.....you'll find out.

Look at my post count. I've been flying for > 5 years. You learn a few things. Fliers that ask questions like yours clearly indicate a lack of experience. Lack of experience generally translates into lack of flying skill. Your video shows it. Your original question is an open admission of both.

Posting the same questions in multiple threads is another indication of lack of experience in the flying community, and the appropriate cautions you should be taking to make sure you, other people, and their property are safe. Unfortunately this is an experience that is often learned the hard way. I'd like to save you that experience. Believe me you really don't want to learn by hitting someone or something with that prop. Wind it up to full throttle and stick your finger in it....you'll see. It's a potentially nasty weapon.

Please, find a safe place to fly.

[spindeepster]

thenameisdame

Please post your location in your signature or on your profile. I'm making a list of places where I'd rather not share airspace with other fliers. Right now it's a short list (very short) but it's a good list just the same.

[kenninny]

what type of repairs were made, is your battery fully charged, but take flydiver advise,and find a better
flying site, because even if you get the cub up, anything can happen why take that chance

[thenameisdame]

kk the only repair was to glue the tail back on.. i dont understand how that could slow it down to the point of not flying..

i just flew it there to see if it would works its the first time i got to fly it

[flydiver]

The tail is a LONG way from the CG. It doesn't take much sloppy work with additional weight back there to screw up the CG.
A simplified truism - a nose heavy plane flies poorly, a tail heavy plane flies once. Tail heavy is VERY nasty to fly unless you are into 3D.

If the workmanship was shoddy it also may be misaligned. That would also make for a flying challenge.

The tail usually breaks off by doing cartwheels caused by trying to land in too much side wind and catching a wing tip while still moving along at a decent clip. Nose > tail > nose > tail.
So I would have a STRONG suspicion that there is damage to the motor/gearbox assembly also.

The stock battery is not very good. It doesn't take much abuse to ruin it. The battery may simply be shot also.

So, you see there are a number of things that could be causing the problem. Hope you got it cheaply.

I will repeat - You should be using almost NO elevator on take-off, just a bit. If you OVER use it you'll stall and fall over. It very much looks like that is happening in the video. It's difficult to tell if it was lack of plane power error or pilot error...or both. To me it looked pilot.
That confined space is going to force you to take off fast and aggressively or possibly hit something. This ups the stakes and can make anyone botch the take off. I wouldn't do it.

NOTE - there is snow on the ground. It's cold. Lipo batteries can lose a LOT of power when they are cold, a whole lot. Do there's another issue.
Keep the battery warm until used.

[spindeepster]

I think the plane in question can be seen here:

supercubclub.proboards.com/index.cgi?action=display&board=crash&thread=4886&page=1