Quick 1340 mock-up flyer

The Rocketry Forum

Help Support The Rocketry Forum:

Tramper Al

Well-Known Member
Joined
Dec 31, 2013
Messages
334
Reaction score
1
I also put together a quick Enerjet 1340 mock-up last night - which is to say an overbuilt BT-56 Eliminator with a payload section and 29mm motor tube. I'm still getting the hang of working with the NCR tube cutter.

I made the motor tube flush, though later noticed the 1340 diagram has it extending out a bit. It will be friction fit, as per tradition. I also have not done anything to simulate the plastic coupler, but I may. And the purple payload section needs a decal or two, or something. Would probably look better with the yellow nose cone, though I am trying to conserve them, so will fly it with the black.

Planning to fly it later this month, with the Estes altimeter inside. And thinking about maybe getting a Jolly Logic too.

P1100688.jpgP1100689.jpgP1100690.jpg
 
Last edited:

BEC

Well-Known Member
Joined
Feb 19, 2009
Messages
3,944
Reaction score
880
Location
Auburn, WA
If you fly the Estes altimeter, be sure to have generous static ports in the payload section. The Estes unit seems to need a faster decrease in pressure to detect a launch than many other altimeters. If you get a reading, it will likely be pretty good. But I've had more than a few flights that came back with the altimeter still reading zero.

The Jolly Logic units (all three of them) are far less fussy.

I did a 1340 from an Eliminator as well. Neat model. So far it's only flown on 24mm motors (via the Estes adapter). I need to go over to the the other side of the state to fly it on a 29mm E or F. Maybe this year.
 

Tramper Al

Well-Known Member
Joined
Dec 31, 2013
Messages
334
Reaction score
1
If you fly the Estes altimeter, be sure to have generous static ports in the payload section.
Thank you for that tip, I have not used it before. I will put some pretty good holes in the payload section, and that will change the look too!

Our big field is a couple of hours away too, in the next state. And highly seasonal, it being a lake!
 

Nytrunner

Pop lugs, not drugs
TRF Supporter
Joined
Oct 15, 2016
Messages
8,005
Reaction score
3,725
Location
Huntsville AL
For what its worth, I've tripped the altimeter with 3 just three holes about the size of a pencil lead (evenly spaced).
 

Latest posts

Top