Kestrel - Northern Colorado Rocketry

This topic has 10 replies, 6 voices, and was last updated 13 years, 6 months ago by Kenneth Reilly.

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April 13, 2010 at 12:46 am #40973
SCOTT EVANS
John
On the Kestrel Motor butt part. 😉
How do you retain the motor and anchor off the chord.
I was thinking that it might me a canidate for one of these plumbing
expansion plugs. And a built in warning sign. All credit to Adrian for this. 8)
April 13, 2010 at 2:06 am #52483
Jeffrey Joe Hinton
Moderator
Well, I believe the Tapered Rear closure will help keep the motor in the bird and the attachment point will be the newly designed/certified Tapped Forward smoke grain holder bulkhead piece – 1/4-20 threaded hole suitable for attachment point of kevlar leash/connectivity cord. Something like that…
April 13, 2010 at 2:07 am #52484
John A. Wilke
Participant
motor retention is what Adrian and I have been doing for years – “friction fit” 😀 It works great. I’ve done it probably 150 times and never lost a motor.

For shock cord attachment, Dr. J has a fwd closure that has a 1/4-20 hole inside. I have also taped a flat Kevlar strap down the side of the motor and tied off to that…

Have y’all seen this? http://groveraerospace.com/?page_id=217&cpage=1#comment-7
April 13, 2010 at 3:52 am #52485
SCOTT EVANS
Note:
Bottle in picture 14. Is that a wine cooler? 😉
April 13, 2010 at 3:54 am #52486
SCOTT EVANS
Well, I believe the Tapered Rear closure will help keep the motor in the bird and the attachment point will be the newly designed/certified Tapped Forward smoke grain holder bulkhead piece – 1/4-20 threaded hole suitable for attachment point of kevlar leash/connectivity cord. Something like that…

Ok….so where is one? Was gona email you tomarow.
I would buy one.
April 13, 2010 at 3:57 am #52487
SCOTT EVANS
motor retention is what Adrian and I have been doing for years – “friction fit” 😀 It works great. I’ve done it probably 150 times and never lost a motor.

For shock cord attachment, Dr. J has a fwd closure that has a 1/4-20 hole inside. I have also taped a flat Kevlar strap down the side of the motor and tied off to that…

Have y’all seen this? http://groveraerospace.com/?page_id=217&cpage=1#comment-7

I would like to see that.
April 13, 2010 at 4:31 am #52488
John A. Wilke
Participant
Well, I believe the Tapered Rear closure will help keep the motor in the bird and the attachment point will be the newly designed/certified Tapped Forward smoke grain holder bulkhead piece – 1/4-20 threaded hole suitable for attachment point of kevlar leash/connectivity cord. Something like that…

Ok….so where is one? Was gona email you tomarow.
I would buy one.

I have one or two of the new fwd closures. I’ll give you one next launch – remind me a day or two before, though!
March 19, 2012 at 8:13 pm #52489
Bret Packard
Participant
Is there really a forward closure for Pro54 motors? Or what is this tapped threaded bulkhead you speak of?
March 19, 2012 at 10:23 pm #52490
new2hpr
Participant
Normally, it’d be the delay element & ejection charge holder. In some of the 54 loads, it’s plugged & tapped. I think it’s all the long-burn versions. Is somewhat reusable.

-Ken
March 20, 2012 at 1:30 am #52491
SCOTT EVANS
Normally, it’d be the delay element & ejection charge holder. In some of the 54 loads, it’s plugged & tapped. I think it’s all the long-burn versions. Is somewhat reusable.

-Ken

It has a tee nut backing it. Might not of ripped the front or the coupler off a couple years ago if I had it then…….. of coarse, I had the closure on the back of the case unscrew last year and the whole moter pulled through! 😆
Cant seem to quit dropping Fin Cans from 10,000 feet unassisted by parachute! 😉
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