Problem with wing ballast is that you want differrent CG for different
tasks. And maybe different CG on different wing loadings. This means you are
stuck on one CG and will have to also put something in the nose (or take
out)....
So even if it takes most time I like slugs and spacers...
Lets take my Brio X-tail that I mostly fly on 119mm CG for duration tasks
(from leading edge).
Then in speed I fly it at 115mm with 1100g of lead (wing loading apx 51g/dm)
In distance I like it to be at the same 115mm with 550g of lead (wing
loading apx 42g/dm)
Then I go to the slope and because of my flying style, wind gradient
(turbulence) and shape of some slopes I vary from 112-119mm with 500g or
1000g..
My point is that my X-tail model likes to be "neutral" for speeds in F3B at
115mm but for other tasks I may shift it a bit..
Anyhow this discussion come sup every 2-4 months it seems ;-)
Hilsen (Regards) Jojo
www.grini.no
------------------------------
Date: Wed, 29 Jun 2005 23:33:07 -0500
From: Greg Smith <[EMAIL PROTECTED]>
To: Ian Roach <[EMAIL PROTECTED]>, Jim Laurel <[EMAIL PROTECTED]>,
Dave Hauch <[EMAIL PROTECTED]>
Cc: RCSE <[email protected]>
Subject: Re: [RCSE] ballast ? wing/fuse
Message-ID: <[EMAIL PROTECTED]>
Ian,
Good point on the fuse ballast when using slugs. All my fuse ballasted
planes use different weight bars, tubes or slabs but all the same
dimensions
with the centre of the weight at the CG. I use aluminum, brass, steel or
lead and can vary the weight through a wide range without changing the CG.
Care would be prudent if you used slugs and spacers to get an even
distribution of weight.
--
Greg Smith
Slope Soaring Resource
http://www.slopeflyer.com
US distributor for Wizard Compact II, Opus DS V, Majko, Airtech models and
PCM Erwin 5 models.
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