Bigger Super Cub battery question

[Niko]

I am a new pilot and i have 4 x 3s 11.1v 35c eflite blade 300x helicopter batteries and i want to know if it is safe to use them in my cub as these batteries are a little bit thicker but they fit into the cub battery tray. What about COG as these batteries are a little heavy than the stock batteries. As these batteries are 1350mah i don't want to blow up my ESC ...

Can someone please assist with this issue

Thanks Niko ...

[jklong03]

I am no battery expert, and hopefully flydive will weigh in on this issue. But I do know that it's not the mah of your battery that would fry your esc. It's the draw of the motor/prop combo that will do this. So... If you are running stock motor and prop and the batteries will fit, just watch your CG and you should be fine. Keep in mind that a heavier plane has more energy behind it when you crash, but if you don't crash often and check your CG then the only real difference you will notice is a faster glide rate with the motor off or idled back.

[flydiver]

Aug 28, 2013 21:49:25 GMT 1 jklong03 said:

.... I do know that it's not the mah of your battery that would fry your esc. It's the draw of the motor/prop combo that will do this.

It's actually the WHOLE system. In the Cub's case the (low end) lipo is the limiting factor. What you say is mostly true though.

A better battery may actually allow a bit more draw at full throttle since the voltage will not sag as much. Whether that is enough extra to take out the ESC is a question. If you don't use full throttle for long periods it likely will be fine. People using the float prop draw a LOT more power.
If they fit, fine. People use 2200 all the time mounted vertically.
The battery is located pretty much on the CG and the Cub is not CG touchy so that part will be fine.

[jklong03]

Well I feel like listening to the experience of flydive is paying off at last! At least I wasn't totally wrong.

For all new members of our fine community, do yourself a favor and follow my example. Ask any questions, even if you think they are stupid ones, because no one here will ever jump on you for trying to learn.

Next, listen to the experts and heed their advice. I find that trying to help others with their questions will benefit them and you as great guys like flydive help correct your reply and that is how we learn. I've been active on this forum for less than a year and feel my general knowledge has increased greatly in that time. Someday I hope to be as helpful as others on here, but I'll keep trying to help and learn in the process.

[toff]

Aug 29, 2013 0:05:53 GMT 1 jklong03 said:

Well I feel like listening to the experience of flydive is paying off at last! At least I wasn't totally wrong.
Ask any questions, even if you think they are stupid ones, because no one here will ever jump on you for trying to learn.

There are no stupid questions...A while back we asked how much weight an SC could carry. I said ' Oh, a house brick' in jest. So someone went and flew their SC with a housebrick attached!

[Niko]

Thanks for the replies so quickly, can't reply that quick but thanks anyway. If I am reading correctly it should be OK to use my 1350mah 35c batteries so long as I do not use to much full throttle. Seeing as I'm new to rc planes I will do most of my training at half throttle. Spoke to horizon UK and they said I should be OK. I have a champ which I have had about 4 weeks and I am doing OK with that and I hope to fly my cub for the first time weather permitting this weekend. I will post a profile soon but with work and flying not got to much time to post, also are there any pre first flight mods I need to do. 

Note... In the cub manual it tells me to reverse the airelon channel but when I do the rudder is moving in the opposite direction to what it should be so I turned it back to normal and that seems to be OK...?


Thanks Niko .....

[robert]

Aug 29, 2013 21:00:49 GMT 1 Niko said:

Thanks for the replies so quickly, can't reply that quick but thanks anyway. If I am reading correctly it should be OK to use my 1350mah 35c batteries so long as I do not use to much full throttle. Seeing as I'm new to rc planes I will do most of my training at half throttle. Spoke to horizon UK and they said I should be OK. I have a champ which I have had about 4 weeks and I am doing OK with that and I hope to fly my cub for the first time weather permitting this weekend. I will post a profile soon but with work and flying not got to much time to post, also are there any pre first flight mods I need to do. 

Note... In the cub manual it tells me to reverse the airelon channel but when I do the rudder is moving in the opposite direction to what it should be so I turned it back to normal and that seems to be OK...?

So, niko... some transmitters require a reversed servo, but the dx6i and above do not. the manual may be referring to the rtf dx4e or the dx5. As long as the elevator  goes up when you pull down and left to left, and right to right on the rudder you're good to go. 

Thanks Niko .....

[toff]

Aug 29, 2013 21:00:49 GMT 1 Niko said:

Spoke to horizon UK and they said I should be OK.

Yup....You should be OK...if not we can always sell you another plane...then tell you something completely different.....or even more as usual, give you no information at all.