What your Battery Capacity for Nitro plane?

[Jcho]

Hi,

Would like to know what battery capacity I should use for nitro-planes with land gears? (Landing Gear Servo draws high current right?)

Thanks for sharing.

Cheers

[Han]

Hi,

Would like to know what battery capacity I should use for nitro-planes with land gears? (Landing Gear Servo draws high current right?)

Thanks for sharing.

Cheers

In my demised Mustang, I use 1500mah 3s1p lipos with a bec from jet hobby. Never had to charge at the field before.
Also try to ensure that there are no bindings when your gear is up or down.

[Jcho]

In my demised Mustang, I use 1500mah 3s1p lipos with a bec from jet hobby. Never had to charge at the field before.
Also try to ensure that there are no bindings when your gear is up or down.

Dear Han,

So you step down your voltage using some ESC? This method sounds great!

Thanks

[Merciful]

If I were to charge the stock battery full before going to the flying site.
Does the landing gear servo really do draw that much power that would shorten the life of the battery charge to less than one day (say....10 flights)??

I've a half assembled arf that uses retract servo. I dun know that this will be a concern until now

[HZM]

Dear Han,

So you step down your voltage using some ESC? This method sounds great!

Thanks

The digital BEC can take an input of 7-40V and gives you an output of 5V@5A

Many of us using this on raptor

Check them out

Mike

[Han]

Dear Han,

So you step down your voltage using some ESC? This method sounds great!

Thanks

Hi Jcho, It's the exact same BEC (battery eliminator circuit) that HZM has posted.

[Han]

If I were to charge the stock battery full before going to the flying site.
Does the landing gear servo really do draw that much power that would shorten the life of the battery charge to less than one day (say....10 flights)??

I've a half assembled arf that uses retract servo. I dun know that this will be a concern until now

Actually using a AA pack would be fine too, as long as you don't have any bindings. Especially when it's fully retracted or extended, adjust your end points on your radio.

Besides retracts another concern would be the types of servos you are using and the size of your bird.

For me, in my 40/60 birds, I just kia soo and prefer the lipo bec way.

[Jcho]

May I know how much it cost? Where you guys brought it?

[rifqi]

bro.. shld be available at jet hobby.. check out the link..

http://www.jethobby.com.sg/cgi-bin/ezsite/prod/manager.cgi?action=show&pid=309&cid=11&idx=1

take care!

[Han]

May I know how much it cost? Where you guys brought it?

It's about 50 - 60 bucks from Jet. Not sure if he has a 6 volts version which imho would be more ideal.

[X34]

Does the landing gear servo really do draw that much power that would shorten the life of the battery charge to less than one day (say....10 flights)??

If u use proper retract servo for retracts, the servo will shut down after reaching stall current. On normal operation, the servo will shut down at the end pt, and it does not draw current at that point. It is designed that way to prevent draining of flight batt.

[Han]

If u use proper retract servo for retracts, the servo will shut down after reaching stall current. On normal operation, the servo will shut down at the end pt, and it does not draw current at that point. It is designed that way to prevent draining of flight batt.

This is something new. Thanks for the info.

[SonicBoom]

I use a LM2940 5V regulator ($3) plus 2 capicator ($0.50) and a heat sink ($1) plus some sodering on a vero board. Rated for 1A load. Can parallel hook up for higher amp. Will regulate up to 26V input to 5V, but a reasonable inout should be around 8V-12V without too much heat.

Less than $5 all in.

[Merciful]

This is something new. Thanks for the info.

yea....that's my understanding too (at least that was what SHS auntie told me).

Jumped when I first saw the receipt for the Retract servo ($74.80!).....didn't ask about the price before hand thought it's the same as other 3003 servos.

But I find that the end points are pretty much fixed....can't adjust much using the Tx. So I played with the push rods instead.

[Merciful]

If u use proper retract servo for retracts, the servo will shut down after reaching stall current. On normal operation, the servo will shut down at the end pt, and it does not draw current at that point. It is designed that way to prevent draining of flight batt.

Qouted the wrong msg in my posting above :p