a DF36 (400/450 size helicopter)
page shows you how to install the Super Battery Tray (SBT400) on 400/450 size heli frames. On some
frames, you may need to drill 2 small holes. I'll be using an old
Walkera Dragonfly36 (DF36) for this example.
we've included rubber bands and screws to fit most applications
with this kit, it's impossible for us to foresee which size parts
will be needed to fit every application. If your batteries are
very small or very large, the rubber bands may not fit, and it's
possible that your frame could need different size screws.
picture above shows the contents of your Super Battery Tray kit.
If you're going to use the non-slip Orange Pad
(recommended), you should install it now. It's a good idea to wash
the top of the Battery Extension Tray (BET from now on) with soapy
water first, then rinse and dry it. Fold back the protective
paper about 1/2" (13mm) in the front and press the pad in
place on the tray, then carefully peel the paper back a little at
time while pressing the pad in place.
the pictures below, I left the Orange Pad off during installation
because it's easier to follow.
the BET on the frame. The BET has 4 posts for holding rubber
bands. Make sure you leave enough room between the middle posts
and the frame (1) so you can
get the rubber bands around them. Some frames have openings here
(open framework) so you can get the exact position of the BET
later. This DF36 frame is not open, so I'll have to drill a couple
holes. A 5/64 inch or 2mm drill bit works well. When you have the
BET in place, use a pencil or an awl to mark the holes (2).
It's sometimes easier to place the BET under the frame to do this,
and drill the holes from the bottom.
drilled one hole first, put the screw through the Filler plate and
into the frame, and used the 2nd hole in the Filler plate to double
check the position of the 2nd hole.
|As you can see, I use a pin vise to hold the drill bit. It takes
a minute longer to drill the holes, but it's easier to hold
everything in place. A pin vise is cheap and it's an excellent
tool to have. I paid $3 for mine 20 years ago, but you can still
get them that will hole 0 to 1/8" bits for about $5 at places
you have the holes drilled, put the BET in place and insert the
screws from the top.
the Filler plate on the bottom to reinforce the frame. The other
side of the filler plate has hex holes that will hold the nuts in
place while you tighten the screws. Washers are not needed for
picture shows SBT400 on a Honeybee King 2, but I'll use it to
point out how the rubber bands go around the hooks. You can use
rubber bands or a Velcro strap to secure the battery. When using
rubber bands on a 400/450 size heli, I've generally found that the
2nd one (near the tip) isn't needed.
your battery is small, don't pre-stretch the rubber bands. If it's
very large, you should pre-stretch them (use 2 hands). When you pre-stretch
these rubber bands, they'll fit larger batteries and still have
lots of elasticity. We supply these as a convenience, but please
realize that they won't fit all battery sizes.
installation with single rubber band and Orange Pad holding the
battery in place.
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