Tungsten welding rod could be a source of extra mass, f.i.:
http://www.r-techwelding.co.uk/welding-equipment/tig-welder-consumables/tig-torch-consumables/tig-welder-tungsten-electrodes/
Jan de Jong
On 8/29/2017 10:01 PM, GRAHAM SINGLETON wrote:
> Rowland
> you could try some tunsten carbide grinding dust from you local tool
> grinder?
> Mixed with a little epoxy its heavier than lead.
> Also polish off some of the paint, at the trailing edge will have most
> effect of course.
>
> Graham
>
>
> On Tuesday, 29 August 2017, 17:27, Rowland Carson
> <rowlandcarson@gmail.com> wrote:
>
>
> <rowlandcarson@gmail.com <mailto:rowlandcarson@gmail.com>>
>
> Having got my ailerons back from the painter, I weighed them. The port
> one was 2480g before filling, profiling & painting; that whole process
> has added 625g to make it now 3105g. The starboard one was 2495g, and
> gained 670g to make it 3165g. The paint was 2-pack automotive which I
> was assured would turn out much lighter (and cheaper!) than the
> gel-coat I had originally envisaged.
>
> I started into the balancing procedure described in the manual. I
> found my hinges are not quite free enough to let the ailerons swing
> freely from them, so I made loops of nylon fishing line, put them
> under the hinge knuckles and suspended the ailerons from them. Alas! -
> both the ailerons balance with the TE slightly down. I find that if I
> put a lead weight on one horn, I can make the aileron balance level.
> My piece of lead weighs 366g and level balance is obtained with it
> about 50mm forward of the hinge line.
>
> Thus the out-of-balance moment towards the TE is 0.0183 metre-kg. I
> wonder if there is any tolerance on the amount of out-of-balance that
> is allowed or is safe - but I dont want to take any chances with flutter.
>
> Avid readers of my online build journal will recall that in May 2003,
> on advice from Neville about getting the proper aileron travel, I
> shaved a little off the top of the lead weights before attaching them
> to the aileron horns. It now appears that either I must have shaved
> too much or that the painting has been much more generous than Neville
> expected.
>
> What should I do? I suppose the ideal thing is to rub down all the
> paint back to the glass/filler again and ask the painter to put on a
> lighter coat. I dont have access to depleted uranium to insert into
> the mass horns to make them heavier!
>
> I hope I might see Andy Draper at the LAA Rally and ask for his
> advice, but would welcome any thoughts others on this forum might have
> on the matter.
>
> in friendship
>
> Rowland
>
> | Rowland Carson ... that's Rowland with a 'w' ...
> | <rowlandcarson@gmail.com <mailto:rowlandcarson@gmail.com>>
> http://www.rowlandcarson.org.uk <http://www.rowlandcarson.org.uk/>
> | Skype, Twitter: rowland_carson Facebook: Rowland Carson
>
>
> http://www.matronics.com/Navigator?Europa-Li; - MATRONICS WEB
> FORUMS -
> http://forums.matro - NEW MATRONICS LIST WIKI -
> http://wiki.matronics.com
> http://www.matronics.com/contrib======================
>
>
|