Nose weight

[Wayne Galligan]

Keith.... they should be trying transcendental meditation and levitate the
tail.

WG


----- Original Message ----- 
From: "Keith Hoard" <khoard at midsouth.rr.com>
To: <discussion at nsrca.org>
Sent: Tuesday, March 15, 2005 5:32 PM
Subject: RE: Nose weight


> You guys are all thinking "inside the box".
> .
> .
> Have you tried pumping helium into the tail of your airplane. . . .
>
>
>
> Keith L. Hoard
> Cordova, TN
> khoard at midsouth.rr.com
>
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On
> Behalf Of Scott Smith
> Sent: Tuesday, March 15, 2005 5:13 PM
> To: discussion at nsrca.org
> Subject: RE: Nose weight
>
> To calc the CG shift:
>
> Define a datum, any point from which all measurements are taken.
>
> Measurements to the left of that point are negative, and to the right are
> positive.  (Use the tip of the spinner and all measurements will be
> positive.)
>
> So you know the weight (say 280 oz) and you know the CG as measured from
the
> tip of the spinner (say 25").  If you stick a 5 oz weight 6" to the right
of
> the datum (spinner tip), the CG will move .33" forward.  This is
calculated
> by using Weight * Arm = Moment where Arm is the distance from the datum:
>
>           W     A    M
> EWCG     280 * 25 = 7000
> Ballast    5 *  6 =   30
>
> Sum the Weights and Moments and solve for the new Arm:
> 7030 / 285 = 24.67
>
> So the CG went from 25" aft of the spinner tip to 24.67"
>
> If you pick the current CG as the datum, then it becomes:
>          W       A     M
> EWCG    280  *   0  =   0
> Ballast   5  * -19  = -95
>        ====          =====
> Total   285           -95
>
> A = -95 / 285 or -.33
>
> So again, the CG is moved .33" forward.
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]On Behalf Of John Ferrell
> Sent: Tuesday, March 15, 2005 10:11 AM
> To: discussion at nsrca.org
> Subject: Re: Nose weight
>
>
> Make a mold from aluminum foil to go inside the fuselage around the nose
> ring.
> melt the required amount of lead in a can with a propane torch.
> Pour lead into mold
> Either glue or screw the weight in place.
>
> Channel locks work better than straight pliers to handle can.
> Lead may be trimmed with pocket knife.
> Silicon (bathtub caulk) is easy to use and remove, but has a 24 hour cure
> time.
>
> Has anyone put together the math to figure out how far from the cg how
much
> weight is needed to move the cg how much?
> Knowns:
>     current cg
>     current airplane weight
>     weight to be added
> Find distance from current CG...
> Or from a reference point?
>
> John Ferrell
> http://DixieNC.US
>
> ----- Original Message -----
> From: "Steve Wiggin" <swiggin682 at cox.net>
> To: <discussion at nsrca.org>
> Sent: Monday, March 14, 2005 6:26 PM
> Subject: Nose weight
>
>
> >I have to add about 2 1/2 oz of weight to the nose of my pattern plane
for
> >static balance. Has anyone ever tried pouring molten lead into an
aluminum
> >spinner to get the weight as far forward as possible? I would probably
have
> >to epoxy the weight in place and balance the spinner/weight, and wonder
if
> >this would cause undue stress on the engine bearings. Any ideas would be
> >appreciated.
> > Steve
> > =================================================
> > To access the email archives for this list, go to
> > http://lists.f3a.us/pipermail/nsrca-discussion/
> > To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> > and follow the instructions.
> >
>
>
> =================================================
> To access the email archives for this list, go to
> http://lists.f3a.us/pipermail/nsrca-discussion/
> To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>
> =================================================
> To access the email archives for this list, go to
> http://lists.f3a.us/pipermail/nsrca-discussion/
> To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>
>
>
> =================================================
> To access the email archives for this list, go to
> http://lists.f3a.us/pipermail/nsrca-discussion/
> To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>
>


=================================================
To access the email archives for this list, go to
http://lists.f3a.us/pipermail/nsrca-discussion/
To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.