On May 6, 6:07*am, JJ Sinclair wrote:
Noel makes a good point on keeping any added weight as low as
possible. Think about what your tail will experience in a ground-
loop........a large twisting moment, the higher the added weight, the
more twisting.........pretty soon you will twist the tail right off. I
believe the LS-4 has a provision to add tail weight on the lower
rudder hinge bracket, I know the LS-6/7/8 has this. All weight MUST be
secured, as in bolted or glassed in. If you pour in lead shot, the
resin should be thickened with micro-balloons and even then the resin
will tend to pool at the bottom. Adding more resin after the first has
cured and a layer of cloth over the lead shot will keep everything in
place.
Hope this helps,
JJ



noel.wade wrote:
On May 5, 8:56 pm, Adam wrote:
On May 5, 10:08 pm, wrote:

I completed *a weight and balance on my LS-4 and *want to put
additional weight in the rear. *The weight and balance included the
5.5 lb battery that is in the tail. *Anyone have any advice or
experience?

Don (CX)

My tailwheel is filled with lead. Works fine for me.

There are brass wheels available commercially from Tost (2kg with
tire)http://www.wingsandwheels.com/page32.htm

I may also make some molded lead weights and glass them in at the top
of the stab. Or lose some body mass...

/Adam

Top of the stab? *I'd check with an authority before installing
something like that - the bending moment you could put on the vertical
stab and the twisting force you're applying to the tail-boom with that
arrangement might not be within the designed limits/loads of the
manufacturer (think about what happens with that weight when you roll
the aircraft). *I'm not a manufacturer so I can't say for sure, but I
would think the base of the vertical stab / tail-boom would be a much
better place to put it. **shrug*

--Noel- Hide quoted text -

- Show quoted text -

I flew years with 3 pounds of lead shot secured in a bag at the top of
the vertical fin above the battery cover (removed the black foam to
make more space). My local authority was ok with that and I never had
a problem, but also never ground looped.

Ramy