- Joined
- Apr 5, 2013
- Messages
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Wrap a single layer of notebook paper around a BT55 And you have a perfect fit for the BT56 fin canIf I have it straight in my head, the rockets those were used in had BT-56 tubes, not BT-55. You can still get a four-pack of BT-56 nose cones from Estes and its dealers easily enough, but there are only a few short chunks of BT-56 left at erockets.biz. You might be looking at wrapping your own tubes to do anything with it.
Booster-55s are cheap enough.
But Enerjet had an F-67!Matt was quick to say, "I told you so".
I built another Maniac with a 29mm mount and successfully flew it on AeroTech F25-9W motors several times.
The hardest I pushed one was on an Apogee F10-8. The damn thing weathercocked in no wind and ended up in Phoenix I think.I flew an Eliminator with a prototype Estes E57 with no issues. That's as hard as I've pushed one.
Like the Enerjet Nike Ram the 1340 had a payload section.But Enerjet had an F-67!
How long is that tube? I have a fin can and an 18" tube. It looks a bit short.
I agree! But maybe the plastic has changed over the years or the old engines weren't true to their designations?I've flown the very similar Quest 35mm fin can up to the F42. Have wondered about how it would hold up to the F67 or G74. Sounds like perhaps that wouldn't be the best idea.
The Enerjet 1340 plastic fin can has been used on many Centuri and Estes rocket models over the years.
I have used them with a variety of projects..
One such project involved an Estes Maniac kit (# 2091).
At the time I had been communicating with Matt Steele who was working at Estes as part of the collaboration with North Coast Rocketry (NCR).
NCR had developed the High Impulse line of products in conjunction with Estes.
This included the F62 single-use Dark Star composite rocket motors.
Matt told me that besides the F62-4 and F62-6 motors which had been released there was also plans for an F62-9 motor to use in lighter weight rockets.
I told Matt I would build a Maniac kit with a 29mm motor mount and bring it to NARAM-42 which was being held not far from Penrose, Colorado.
I wanted to fly it with one of those F62-9 Dark Star motors.
Matt warned me that the Enerjet fin can could not handle the stress of flying with an F62 motor.
I asked Matt to bring an F62-9 to NARAM-42 and we would find out.
At NARAM-42 I loaded my modified Maniac kit with the F62-9 motor.
At ignition there was smoke then the model was gone!
(For a moment).
Then parts started raining down around the launch pad.
The fins has fluttered so much under acceleration that they had started to separate from the fin can.
This caused the model to go unstable, fold the body tube and come apart.
Matt was quick to say, "I told you so".
I built another Maniac with a 29mm mount and successfully flew it on AeroTech F25-9W motors several times.
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