Battery tray/compartment size?

[Graviteesuks]

Hi All,

I am building an aerial photo bird and the E720 has won my vote for the bird to do it with.
Gary Wright give me some really good advice on how I need to set it up for photography and for F3C and light 3D flight just by changing landing gear/skids, batteries and headspeeds.
I'll be using a removable landing gear/skid with all of my camera gear on and another without any camera gear on it so all I have to do is switch landing gear/skids (I'll have some quick disconnect type clips to make it quick and easy). Then I'll pop in a couple 5000mAh batteries and up the headspeed in stunt/idle up 2 mode for F3C/mild 3D type flying. Pretty cool to get the best of both worlds out of the same bird. (I'll still be flying my Raptor 90 nitro some though).

My question is this: I need to know what the actual measurements inside of the battery compartment are so I can make sure that the batteries I plan to order will fit inside of the compartment (I can't find any info about it, not even in the manual I downloaded from TT's website).
Could someone who already has an E720 electric heli measure the inside of the battery compartment for me please? I need to get the largest batteries I can for the photography part for extended flight times. Then for fun flying I will use the 5000mAh batteries I mentioned earlier.

Depending on what battery manufacturer it is, they can vary in physical size quite a bit sometimes so I may even have to use a different brand to get them to fit. (I usually use Hyperion or ThunderPower depending on what's on sale at the moment but in this case I may have to use a totally different brand than what I'm use to using).

I would forever be in your debit! :noteworthy

Thank you so much!

[rotormonkey]

If your battery is < 140mm long, then you can get away with 67mm wide. Because of mounting bits for the tray that get in the way you can't go longer if you're wide.

Otherwise you can go up to 50mm wide and as long as you want since the rear of the heli is wide open - just need to worry about CoG at that point.

Height is 105mm.

[Graviteesuks]

If your battery is < 140mm long, then you can get away with 67mm wide. Because of mounting bits for the tray that get in the way you can't go longer if you're wide.

Otherwise you can go up to 50mm wide and as long as you want since the rear of the heli is wide open - just need to worry about CoG at that point.

Height is 105mm.

Love your avatar and your screen name :D It's just cool!
Wish I had my sense of humor at the time I created mine. With my screen name, I should post an avatar of a seriously mangled heli eh? :D

Thank you so very much for taking the time to check it out for me. It sounds like the 5400mAh batteries I had in mind for the photo part will work (barely) but they will work with a "little" room to spare. The CoG should be fine as most of my camera gear will be toward the front of the landing gear/skids, almost centered with the front strut.

I'm really glad we have sites like this to get the answers and help we sometimes need!

Thanks again!! :noteworthy

[rotormonkey]

Hey cool. Glad to hear everything's gonna work out for ya.

At least that heli was useful for something. It's just gonna keep sitting where it is for the next two or three months now. Stupid cold..

Anyway, happy to help. Just pay it forward buddy! :)

[Graviteesuks]

:DHey cool. Glad to hear everything's gonna work out for ya.

At least that heli was useful for something. It's just gonna keep sitting where it is for the next two or three months now. Stupid cold..

Anyway, happy to help. Just pay it forward buddy! :)

Wow, I guess where you live, the good flying days are few and far between :thumbdown:

Here in NC, we have a saying, "If ya don't like the weather here, just wait a day or two, it'll change". Some days are windy and 20 degrees or less and others are no wind and 50 degrees in the middle of winter so we do get nice breaks in the weather to go flying.
I flew for nearly three hours with various helis on Friday, wind was 12 to 15 mph but that just keeps me on my toes :thumbup: Doing funnels are funny looking in the wind, I can start a tail down funnel at one end of the field, do good even round funnels and come out on the other side of the field (depending on which way the wind is blowing) because the wind makes the heli drift across the field. It's kinda cool to be hovering in 20 mph wind and watch it hover at a 35 degree angle just to keep it hovering in one place. I have to land into the wind though which is really tricky if it gets gusty. I don't fly if it's gusty but it has turned gusty while I was already in the air, steady wind is Ok but gusty can make it really hard to land and it get's my heart beating real fast. I have had the wind blow my 450 over after it landed (luckily the rotor had already stopped turning when that happened. Whew!
When it's 20 degrees (really anything less than 38 degrees or so) I won't fly cause my fingers get numb quick and can't feel the sticks.
We've had fairly warm days with snow on the ground so I lay down a large heavy rubber mat to takeoff and land on. That's cool flyin'! Fast forward flight about 3 ft. above dry snow and watch the snow kicking up as your heli goes by is a really neat experience. It's rare to have dry snow here though. I bet you guys have dry snow a lot of the time if not all of the time. I used to live in northern Mn and it was always dry with heavy snow drifts nearly everyday it seemed like.

Anyway, enough rambling.

Thanks again and I hope you can get a break in the weather or find a large empty warehouse to fly in. That's a new challenge on it's own. :D

Have a great evening! :thumbup: