## Guestimating weight added by fiberglass

### Guestimating weight added by fiberglass

How much weight is usually added when 2 layers of 6 oz. glass and a 1.4 ox.
veil are added to a 34" LOC 54mm Paper tube?

--
Stephen Corban
NAR# 81338
GYRO# 1
If you build it, they will come
www.geocities.com/ilrocketboy

### Guestimating weight added by fiberglass

Also, does a 34" long piece of 54mm tube really weigh 9 oz.? More than it's
Phenolic counterpart?

--
Stephen Corban
NAR# 81338
GYRO# 1
If you build it, they will come
www.geocities.com/ilrocketboy

Quote:
> How much weight is usually added when 2 layers of 6 oz. glass and a 1.4
ox.
> veil are added to a 34" LOC 54mm Paper tube?

> --
> Stephen Corban
> NAR# 81338
> GYRO# 1
> If you build it, they will come
> www.geocities.com/ilrocketboy

### Guestimating weight added by fiberglass

The weights of glass cloth are per square yard and do not include the epoxy
resin.
The holy grail of fiberglass layup is to achieve a 60/40 weight distribution
(glass/
epoxy) but 50/50 may be more conservative.  Figure how many square yards of
surface area you have and multiply by 13.4 to get the weight of the cloth only
and
then double that to get the weight of the cloth plus epoxy.  You'll only
achieve
this if you squeege out all excess resin or vacuum bag it.

My calculations are as follows :

LOC 54mm tube has an OD od 2.16" which gives a circumference of 6.754"
The 34" length gives a surface area of 229.65 sq-in or 0.177 sq-yd.  Thus we
should have a weigh of 0.177 sq-yd * 13.4 oz/sq-yd * 2 = 4.75 oz.

Larry Hardin

Quote:

> How much weight is usually added when 2 layers of 6 oz. glass and a 1.4 ox.
> veil are added to a 34" LOC 54mm Paper tube?

> --
> Stephen Corban
> NAR# 81338
> GYRO# 1
> If you build it, they will come
> www.geocities.com/ilrocketboy

### Guestimating weight added by fiberglass

Aloha,
Precut your cloth after seeing how much is needed. Then add that same weight in
resin.

Take Care,
Larry

### Guestimating weight added by fiberglass

Quote:

> How much weight is usually added when 2 layers of 6 oz. glass and a 1.4 ox.
> veil are added to a 34" LOC 54mm Paper tube?

From some experiments I did ago with hand layups, approximately double
the dry weight of the cloth to get the total weight including the resin
too.

-dave w