Re: Re: Rubber weight and size

From: Chris <pseshooter3d_at_yahoo.com>
Date: Wed, 30 Dec 2015 19:07:04 -0500

I have started to use mass per length as well as most others. It is just a better way of doing things when it comes to making motors. What I have found myself doing as of late is using Mike Kirda's rubber stripping spreadsheet (which outputs a distance measurement) to get me in the ballpark, then weigh a sample of the rubber and adjust as needed.

I think as long as you are using motor mass per length, the units don't much matter, as long as you use the same units consistently.

CG

Sent from my iPhone

> On Dec 30, 2015, at 6:43 PM, Don Slusarczyk don_at_slusarczyk.com [Indoor_Construction] <Indoor_Construction_at_yahoogroups.com> wrote:
>
> Leo,
>
> I do use gr/inch actually. The reason is metric length to me I have poor concept of due to my brain, but since I weigh my models in grams I weigh my motors in grams as well so I know my rubber to model weight ratio. Some events I like to maintain a specific minimum ratio.
>
> Don
>
>> On 12/30/2015 3:46 PM, leop_at_lyradev.com [Indoor_Construction] wrote:
>>
>> If you want to really mess with your head, use grams per inch for rubber linear density. Or grams per inch per strand (as used by our esteemed current Indoor World Champion although he is now also specifying grams per meter).
>>
>>
>> But then, there are British fliers who give torque in inch-grams which is a bit worse than the European fliers who use gram-centimeters.
>>
>> LeoP
>
> --
> Don Slusarczyk
>
Received on Wed Dec 30 2015 - 16:07:10 CET