[BProckets] BP mix for #20 rockets

[Joseph Madziarczyk]

Hi Doug,
I actually have two kinds of fiberglass tubing, one in yellow with the 
distinctive glass cloth and the other is a dark red that looks like it 
is spiraled up.  In any event although they say they are 2"  the 2" is  
nominal as it is actually closer to 2.25".  My tooling is 2.00", so I 
have a bit of slack.  Fortunately I have paper tubing that is 2" ID and 
2.25" OD.  I am going to marry the one tube in the other.  The comp 
will be pressed with a hydraulic press so the combination of the two 
tubes should work.


JOE



On Friday, September 17, 2004, at 11:33  AM, Doug wrote:

> Joe,
> Are you using the fiberglass gas line tubing??? (Redline I think it's 
> called??)
> Doug
>>
>> From: Joseph Madziarczyk <jtmadziar at cox.net>
>> Date: 2004/09/17 Fri PM 02:08:14 EDT
>> To: Black Powder rockets discussion list 
>> <bprockets at amateurrocketry.com>
>> Subject: Re: [BProckets] BP mix for #20 rockets
>>
>> I would say air float too, but I had thought that at that size maybe 
>> he
>> was slowing down the mix with a mixture of air float and coarse
>> charcoals.
>>
>> I have tooling for a 2"id bp rocket and was going to press out a 
>> couple
>> this weekend. Since the bore is close to his, 2 1/4", I wanted use a
>> mix closer to the 20# than a 6#.
>>
>>
>> JOE
>>
>>
>> On Friday, September 17, 2004, at 01:52  PM, mrgizmo wrote:
>>
>>> I would imagine airfloat since he usses excess fuel from the classic
>>> formula.
>>> ----- Original Message -----
>>> From: "Joseph Madziarczyk" <jtmadziar at cox.net>
>>> To: <bprockets at amateurrocketry.com>
>>> Sent: Friday, September 17, 2004 10:18 AM
>>> Subject: [BProckets] BP mix for #20 rockets
>>>
>>>
>>>> Hi all,
>>>> Bruce makes these great #20 BP rockets.  His formula is 60, 30, 10.
>>>> Does anyone know what mesh charcoal(s) he is using?
>>>>
>>>> Joe
>>>>
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>>
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>
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