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  #21  
Old 01-16-2019, 06:17 PM
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tbzep tbzep is offline
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Quote:
Originally Posted by ghrocketman
MAJOR BUMMER.
I'd really like to see the Old-school K-21 BT70 Gemini Titan back.
Thought we would never see the 1/45 LJII. We got that one, so.....

My guess is that John is building a larger more detailed GT for a specific purpose. That doesn't mean some form of the old K-21 won't ever show back up.

In the mean time, scratch build one. Back in the more recent golden era of SEMROC, there was about a two year stretch where darn near every scratch build my son and I did of an OOP kit, Carl released a kit for it! Take one for the team and maybe the new Estes will do the same!
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  #22  
Old 01-16-2019, 06:25 PM
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Quote:
Originally Posted by tbzep
My guess is that John is building a larger more detailed GT for a specific purpose. That doesn't mean some form of the old K-21 won't ever show back up.

In the mean time, scratch build one. Back in the more recent golden era of SEMROC, there was about a two year stretch where darn near every scratch build my son and I did of an OOP kit, Carl released a kit for it! Take one for the team and maybe the new Estes will do the same!


You seem to have a really good track record. I think we all would kindly request that you start a scratch-build of the Gemini-Titan. Your efforts will be appreciated by all of us.

Thanks in advance!
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  #23  
Old 01-16-2019, 07:04 PM
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John,

Will we see that fly at the TARC finals?

Steve
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  #24  
Old 01-16-2019, 07:19 PM
JediBoss JediBoss is offline
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For what itís worth, this is my only picture of the Gemini Titan at the Rocket Garden at Kennedy Space Center. Hope it helps.
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  #25  
Old 01-17-2019, 06:44 PM
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Here are some good pictures of the twin engine assembly
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  #26  
Old 01-17-2019, 07:24 PM
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JumpJet JumpJet is offline
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Those are great Photos.


Thanks everyone for responding to my original post asking for help on this subject.


John Boren
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  #27  
Old 01-19-2019, 05:21 PM
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Quote:
Originally Posted by JumpJet
Those are great Photos.


Thanks everyone for responding to my original post asking for help on this subject.


John Boren



John,

This may help . . .

Dave F.
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  #28  
Old 01-19-2019, 05:40 PM
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I'm taking the easy way out. I will be purchasing a wrap from John Pursley when one comes available .

I test flew the model today on two E12-4 motors. It took off just fine but ounce the thrust stopped it started to wobble. It wasn't a pretty launch but it was plenty high for the chute to come out. One of the plastic fins broke and the motor tube sticking out the rear kinked a bit. I'll build another fin unit and reinforce the motor tubes. I really think this model needs a couple of E30 motors to get the speed up on launch. It's a real slow flying rocket with E12 motors.


John Boren
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  #29  
Old 01-19-2019, 08:45 PM
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Quote:
Originally Posted by JumpJet
I'm taking the easy way out. I will be purchasing a wrap from John Pursley when one comes available .

I test flew the model today on two E12-4 motors. It took off just fine but ounce the thrust stopped it started to wobble. It wasn't a pretty launch but it was plenty high for the chute to come out. One of the plastic fins broke and the motor tube sticking out the rear kinked a bit. I'll build another fin unit and reinforce the motor tubes. I really think this model needs a couple of E30 motors to get the speed up on launch. It's a real slow flying rocket with E12 motors.


John Boren



John,

Those E12's are only about 27 Nt-Sec each. ( of course, you already knew that - LOL ! )

I know you mentioned Aerotech E30's, but I'm thinking a pair of Aerotech E15's, before going to the "big guns".

Dave F.
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  #30  
Old 01-19-2019, 09:15 PM
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Quote:
Originally Posted by Ez2cDave
John,

Those E12's are only about 27 Nt-Sec each. ( of course, you already knew that - LOL ! )

I know you mentioned Aerotech E30's, but I'm thinking a pair of Aerotech E15's, before going to the "big guns".

Dave F.


E30s are easier to ignite than E15s/E20s
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