Re: [ATM] Dob Design Questions

["Rod Shea" <RodShea@comcast.net>]

Mel,

I plan to make them as light as possible, a 180 degree ring segment maybe 
2-3" thick, radially, of 6mm Alucobond, something similar, or thinner 
aluminum.  If they are not stiff enough, and/or if I add encoders,  I am 
thinking of a spoke and hub arrangement, or a modified one, similar to Dan 
Grey's or Howard Banich's 28's.  Enough OSP walkabouts that you put together 
have convinced me I can do this with pretty lightweight components.

Thanks,

Rod


----- Original Message ----- 
From: "Mel Bartels" <mbartels@bbastrodesigns.com>
To: <atm@atmlist.net>
Sent: Friday, September 17, 2004 4:11 PM
Subject: Re: [ATM] Dob Design Questions


>> bearing would get bigger & heavier as its radius increases, since its 
>> volume
>
> Don't build them solid, but make them more a spoke and rim approach. Then 
> increases in size don't add that much weight.
>
> Mel Bartels
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 


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