[Rhodes22-list] BR Frame Material

[Bill Effros]

Dave,

Of course, I don't really know the answers.  I'm just imagining the 
problems.

As we used to say when we were kids, if this rig fell on you "it 
wouldn't tickle".

There is no question you could build a rig that will stay up when the 
water is calm and the wind isn't blowing.

But would you want your daughter under something you had to worry about 
all the time?

When the main sail sail is unfurled, the mast supports the boom.  Leave 
the topping lift slack. 

As I understand this boom room, it is supported by the topping lift.  If 
the line pops out of the cleat, the whole thing comes crashing down.  If 
wind gets under it from one side, could it pop the yoke off the 
boom?...and come crashing down?

The more mass it has, the greater the danger.  If the whole thing is 
made of PVC and nylon and it falls down, it's just funny, not dangerous.

Carbon fiber is light, but it ain't cheap.

Aluminum is a compromise...

Slim's BR seems to be attached to the frame with Velcro straps.  If we 
made pockets in the panels, and slipped the frame into the pockets, you 
would never even see what the frame was made of.  I haven't thought 
through the physics, but I wouldn't be surprised if you could leave most 
or all of the frame inside the pockets all the time, and lock them upon 
assembly.  Storage space would be little more than storage space for the 
frame itself.

But...when you put the topping lift under tension it hums.  This can get 
quite annoying.  If the rig weighs a lot, it may be tough to get the hum 
out of the supporting lines...

Just imagining.  Keep thinking.  More to come.

Bill Effros

David Bradley wrote:
> Wouldn't the boom support the weight?  If the frame had a yoke on the
> boom it would balance until the side panels or straps were attached to
> provide lateral support.
>
> Dave
>
> On 2/4/06, Bill Effros <bill at effros.com> wrote:
>   
>> What would be the weight of a Stainless Steel frame?
>>
>> Is this something we want to suspend from a rope on a cleat?
>>
>> Bill Effros
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>>     
>
>
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> David Bradley
> 203.253.9973
> dwbrad at gmail.com
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