Wimpy Black - Northern Colorado Rocketry

This topic has 4 replies, 3 voices, and was last updated 15 years, 4 months ago by John A. Wilke.

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May 18, 2010 at 12:45 am #41010
Anonymous
I’ve been working on a new formula. It’s called Wimpy Black and is sort of unique it that it does this after burner effect. I kind of sounds like a skid mark..(is that a bad word here?) It only has 0.1% metals in it. This could be left out if need be. It’s also long burning. It will run with a Kn of 280 up to 400. Is easy on the hardware too. I’ve re-used some paper liners as many as four times same witth the o-rings. It chuffs at Kn’s below 250 as you can see. and I was playing around with various delay grain lengths..some of them were to short. The test motors where tied down to protect the grass. No grass was harmed during these tests!

http://www.youtube.com/watch?v=yoFM9VC-9qM

http://www.youtube.com/watch?v=lxo1jRmHHI8

I was able to fly it this past weekend and was happy how the motors went.

http://www.youtube.com/watch?v=kKfAxYmsTm4

We also flew some Wimpy Black in AT 29/120 case = G36 and in the 29/180 case was a G45

Here is the grain configuration for the 75mm motor…

Here is the formula..

Tony
May 18, 2010 at 1:14 pm #52703
John A. Wilke
Participant
Wow – that sounds like a really nice combination (LOUD, easy cleanup, long burning)…. how is performance? I know you are an altitude guy 8)

Will we see this at BALLS? There is a rather large herd of NCR guys coming to Black Rock this fall – hopefully we can see it then?

How large of a motor have you done w/ this? Sounds awesome!
May 18, 2010 at 1:16 pm #52704
MikeS
Moderator
Pretty Cool. ‘I like it…..I like it a lot’
May 18, 2010 at 9:24 pm #52705
Anonymous
John, It’s not very good performance at all. Me an altitude guy? Where did you get that idea. I’ll be at Balls and am looking forward to seeing you guys. I still remember the Elk Burgers I got. They helped ease my ‘misplacing’ my rocket. Below is what I’ve got going for Balls this year.

Mike, I like it a lot too!

Tony
May 19, 2010 at 2:03 am #52706
John A. Wilke
Participant
Me an altitude guy? Where did you get that idea.

Tony

I got that idea because I haven’t ever gotten w/in 10K of your best shot. Bring your “A” game to the playa this year, though 😀 I have an interesting project up my sleeve….
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