Re: Re: Exact Builder of Model Rule

From: Kevin Lamers <kevin.lamers_at_gmail.com>
Date: Sun, 9 Feb 2014 07:38:21 +0100

Didn't read your messages before I send the previous one.
100 mg is impressive if you are successful! Is this without the need of
boron?
The prepreg (19 gsm, about 0.02mm) can be obtained from:
Www.creativecompositetechnologies.com

Kevin
Op 9 feb. 2014 07:34 schreef "Kevin Lamers" <kevin.lamers_at_gmail.com>:

> My carbon tubes are not overly stiff. Bending stiffness is still mainly
> controlled by the bracing. Which could even be ommited for minimal
> stiffness. The carbon tube does has superior stiffness in circumfencial
> direction though. Other advantages are consistency of the material and
> resistance against breaking of motors.
> Nevertheless I look forward to see what you come up with. This type of
> innovation is what makes this hobby so interesting!
>
> Kevin
> Op 9 feb. 2014 06:01 schreef "Nick Ray" <lasray_at_gmail.com>:
>
>>
>>
>> Carbon tubes were successfully used at the 2012 world champs. I suspect
>> we will see some this year as well.
>>
>>
>> On Sat, Feb 8, 2014 at 11:30 PM, Phedon Tsiknopoulos <phedon21t_at_yahoo.com
>> > wrote:
>>
>>>
>>>
>>> According to Steve Brown a very stiff tube is worthless because it just
>>> does not flex downwards enough in order to give some very much needed down
>>> thrust during the initial burst.
>>> So carbon is out on all counts!
>>>
>>> Sent from my iPhone
>>>
>>> On Feb 8, 2014, at 12:56 PM, Kevin Lamers <kevin.lamers_at_gmail.com>
>>> wrote:
>>>
>>>
>>>
>>> The weight of 225 mg is for a carbon tube with a length of 10". 9" I can
>>> also make at 200 mg.
>>> My ID is 4.8mm = 0.2". They are probably stiff/strong enough to use
>>> without bracing.
>>>
>>> OK keep your process secret, but please share the material you used ;-)
>>>
>>> Kevin
>>>
>>>
>>> 2014-02-08 21:41 GMT+01:00 Phedon Tsiknopoulos <phedon21t_at_yahoo.com>:
>>>
>>>>
>>>>
>>>> Carbon is unsuitable for motor tubes.
>>>> My tubes have no carbon. Prepreg is too heavy.
>>>> My process will remain a secret.
>>>> What length are your tubes as you use them for official flights?
>>>> I shall be sending Mike Kirda a 9" one in order to test it
>>>> Mine are 1/4" I.D.
>>>>
>>>>
>>>>
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Feb 8, 2014, at 11:56 AM, Kevin Lamers <kevin.lamers_at_gmail.com>
>>>> wrote:
>>>>
>>>>
>>>> Best wishes,
>>>> Kevin
>>>>
>>>>
>>>
>>
>>
>
Received on Sat Feb 08 2014 - 22:38:22 CET