Author Topic: Battery mount (Read 1002 times)

Randy Powell · « **on:** December 30, 2012, 01:03:35 PM »

Can some of you guys post pictures of your battery mount? I'm working on mine and want some ideas. Any particular concerns other than the fore and aft position be adjustable?

Dave Denison · « **Reply #1 on:** December 30, 2012, 06:26:02 PM »

Hi Randy

Getting that battery to fit in exactly the right spot can be problematic to each and every airplane. I posted a picture for you on your build thread last night that shows a direct in the cowl look. In that photo the battery tray is shown mounted on the sides of the fuselage using to hardwood stringers. The position of the battery horizontally was determined by using Howard's comment, on a post he made last week. In that post he indicated that the best spot for the battery would be on or slightly above the centerline of the fuselage/wing.

I've included a couple more photographs showing the nose and battery area of my Cardinal. This airplane has a flat plate epoxied to the floor between the original I/C beams. Most all of the original Maple beams were milled out because this airplane was never flown as a I/C plane.

We could help you better, if you were to post a couple of photographs of either the fuselage drawings or the front of the fuselage itself.
Regards.

Dave.
ama41041

keith varley · « **Reply #2 on:** January 03, 2013, 09:22:53 AM »

I think that besides adjustability , the most important feature is having the entire battery exposed to the airflow , as much as possible , not just closed up in a box.You might not notice it , but in the life of a battery , heat is an important factor. Keith

Randy Powell · « **Reply #3 on:** January 03, 2013, 09:52:18 AM »

Keith,

Yea, I'm thinking for using a sort of frame to put the battery in with plenty of airflow then screwing the frame to some mounts in the compartment. My primary concern is sufficient airflow and ease fo access for changing batteries out but allowing for both vertical and horzontal adjustment. I think I have it worked out. I was mostly looking for pictures to demonstrate airflow rather than mounting, really.

eric david conley · « **Reply #4 on:** January 03, 2013, 10:16:41 AM »

I'm a carrier flier and I don't know if you can use this info or not. When I was using 35C batteries I would try to get some air flowing over the batteries in the CL-1&2 planes because the batteries would warm up pretty good in the all out carrier events. Then the 65C batteries came along and now I don't even think anymore about air going over the batteries, they just don't get warm anymore even when shut away inside a non vented fuselage. The ESC and motor are a very different story and I cant seem to get enough air for them. In some cases the 65C batteries are a little heavier but only by a few grams because of the heavier power cables they use. The 65c batteries are just fine. Eric

Alan Resinger · « **Reply #5 on:** January 04, 2013, 08:49:52 AM »

Randy,
My batteries simply mount on a plate that also mounts the ESC on the bottom side. It is adjustable fore and aft and the battery uses Velcro straps to hold the battery and then a final foam plug at the rear which fits between the fuse sides. As I said before keep the whole thing simple and lightweight.
Alan

FLOYD CARTER · « **Reply #6 on:** January 04, 2013, 10:37:05 AM »

I also use Velcro straps for the battery, with pieces of 1/4" square balsa glued around to keep it from shifting. Why make it complicated?

Floyd

Randy Powell · « **Reply #7 on:** January 05, 2013, 12:30:52 PM »

I was going to try to stay away from Velcro if I can. I know it's easy, but I have an idea for a clip system that will let me drop the battery in then just twist a clip to how it in. Probably use some sort of rough base, maybe Velcro, to aid in keeping the battery from slipping in the mount.

Ron Heckler · « **Reply #8 on:** January 06, 2013, 10:02:10 AM »

Quote from: Randy Powell on January 05, 2013, 12:30:52 PM

I was going to try to stay away from Velcro if I can. I know it's easy, but I have an idea for a clip system that will let me drop the battery in then just twist a clip to how it in. Probably use some sort of rough base, maybe Velcro, to aid in keeping the battery from slipping in the mount.

Hi Randy,
Here are a couple of shots from the front and side of my battery compartment. All the electronics are mounted on the bottom of the fuse with velcro. Two pieces of 1/4 balsa are used for the battery platform right above the electronics. The back piece has velcro on it and each battery has a strip of velcro from the back to the middle. Then the battery can be moved back or forward to change the CG. There are velcro straps epoxied to the sides of the fuse to hold the battery down (blue strips in pict).

As far as air flow goes, there is a large hole in front where cowl would be (as with any stunt plane), a hole in bottom of fuse behind wing, and the rudder is mounted in center of rear spacers (top and bottom) to create slots on either side for hot air escape.

This system has worked fine for me. When the plane lands, motor and electronics are nice and cool.

I hope this has been of some help.

Ron

Randy Powell · « **Reply #9 on:** January 07, 2013, 09:29:27 AM »

Thanks, Ron.

Author Topic: Battery mount (Read 1002 times)

Randy Powell

Battery mount

Dave Denison

Re: Battery mount

keith varley

Re: Battery mount

Randy Powell

Re: Battery mount

eric david conley

Re: Battery mount

Alan Resinger

Re: Battery mount

FLOYD CARTER

Re: Battery mount

Randy Powell

Re: Battery mount

Ron Heckler

Re: Battery mount

Randy Powell

Re: Battery mount