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  #11  
Old 04-12-2012, 11:37 AM
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Default Stand Decal File

Here is the decal file for the stand in PDF format. Did some research and found that JATO stands for Jet-Assisted-Take-Off. The booster was made by Aerojet, a now company of GenCorp...

Update Note: Had to replace the decal file because one of the fins would cover the "Aerobee" logo. Should look better now.
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File Type: pdf Aerobee Stand Decal.pdf (23.2 KB, 42 views)
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Last edited by rosko_racer : 04-12-2012 at 12:48 PM.
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  #12  
Old 04-12-2012, 12:51 PM
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Default Pictures of A-H with Stand

Here is the A-H with the stand.
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  #13  
Old 04-13-2012, 03:31 PM
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Default

Exceptional finish. According to the very brown original instructions the motor when inserted in the model should provide that:

"A motor when placed in mount, should extend out about 1/4" from tail end of the missile."

The original mount was a joiner tube with a ring cap on the forward end. In the reproduction for NARAM 50 the mount is a tube with a rolled end to serve as a thrust ring. The rear end of the mount should have been 1.5" from the end of the BT. The mount is 1" long so properly installed the forward end of the mount would have been 2.5" from the aft end of the BT. This would give you the .25" overhang at the aft end.

If your motor will only go in .5", then in all probability the mount was installed short. You could attempt to open out the roll and then add a thrust ring forward to provide both a more aesthetic look and a correctly balanced model. Also, bear in mind that the motor mount provides centering of the motor in the BT. You may still want to add some tape to the aft end of the motor to ensure that there is no wobble under thrust.
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  #14  
Old 04-13-2012, 05:18 PM
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Thanks JH!

On my Aerobee the engine hangs 9/16" pass the BT. The original builder put a thrust ring where the kevlar cord is attached to. If I remember well, the motors when the original kit came out were 2.5" instead of today's 2.75"... if so then it was built according to the original instructions. How one could remove the thrust ring that deep in the rocket? I could saw off .5" off the top of the engine I would use... or I could convert it to mini-motors...

- R_R
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  #15  
Old 04-13-2012, 06:05 PM
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Not an issue of the motors at the time. The NARAM release specifically put the front of the motor mount 2.5" from the aft lip. With a 2.75" motor that would give you the .25 overhang. The original and the re-release used two slits in the forward tube to attach the shock cord. You could pick out the thrust ring but you have got far too nice a finish on that to risk knocking around the thrust ring. I guess the question is can you get a slim tool (dental probe or thin spatula up into the thrust ring and delaminate it enough to get it out.

I still think that you have put too much into a quality finish to fight an error. Load your flight motor and swing test to make sure it is stable then fix that and fly.
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