Help on fabric order please.

a liter is 4 inches cubed

40 liters is a 14 inch cube

you could probably wrap a 14 inch cube with 1 yard of fabric.  It’s 54″ wide.

find a 40 liter pack you already own, measure it, see if 1 yard would be enough

maybe 1.5 yards or 2 yards just to make sure you have enough

I made a pack with 2.92 oz Dyneema.  RSBTR.  That worked really well.  I’ve only used it on a few trips.  That seems plenty robust for anything I’ll ever do.  My pack is something like 40 liters.  I ordered 1.5 yards.

The amount of fabric depends on the pattern you use, size of the pack and features. If you have odd shaped panels (curves that don’t fit against each other well), expect to use a bare minimum of a yard for a small to medium backpack – two yards would be a better bet, especially if you’re making a second 10L pack too. Once you have your pattern, then you can determine your fabric needs down to the square inch (assuming no mistakes requiring a re-cut).

Ta Jerry,

I don’t own a 40L and being from Oz the yards are a bit confusing -thinking in metres her Ha ha.

1.5 yards worked, that’s great to know. Do you think there would be enough leftover for a wee 10L rucksack?

The 2.92 Dyneema is that the 50D same as the HMG white model.

At a glance on RSBTR that would be 3 times (as sold by the half yard) $22US -so $66? Is that right?

Ta Graham

Ta Lester. Two yards sounds good!

Jerry’s comment and yours steer me towards two yards.