Pro38 Forward Closure failures bulletin from CTI

Discussions of motors from single-use and RMS solid propellants to hybrid propellants

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Viking
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby Viking » Thu Jul 14, 2016 2:59 pm

A new comparison photo got posted over on TRF today.
Shows the difference pretty well I reckon.
Bad on the left, good on the right.

http://www.rocketryforum.com/attachment ... 1468451965
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Happy Heyoka
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Re: Pro38 Forward Closure failures and V-Max delay snuffing

Postby Happy Heyoka » Fri Jul 15, 2016 2:13 pm

Just looking for a little clarification: the forward closure epoxy problem and the V-Max delay snuffing thing are two separate issues?
(delay snuffing thing as per bulletin sent out via the Tripoli announce list)
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vance2loud
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby vance2loud » Fri Jul 15, 2016 3:49 pm

Two seperate issues.
When the forward closure issue gets sorted (hopefully soon) the V-Max issue will still remain.
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby Lamp » Fri Jul 15, 2016 5:33 pm

I believe the delay snuffing issue is due to a shock wave that develops inside the motor. We discussed this issue at our club meeting on Wednesday night. The current Tripoli recommendation is to use electronic ejection with V-Max motors in order to prevent a possible ballistic recovery.
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SpaceManMat
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby SpaceManMat » Sat Aug 20, 2016 10:04 pm

Is there an update on this Blake?

I've got an I216 and it's definitely one of the bad ones.

I plan to fly it at Westmar.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby kopius » Mon Aug 22, 2016 1:05 pm

Still working on the logistics of the transportation of the replacement units. Because the are dangerous goods, we unfortunately can't just stick them on any courier.

If you are certain you have a motor affected by this, please email us info@ausrocketry.com.au with the motor designation and we will pull one from existing stock so you won't have to wait until the replacements arrive.
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SpaceManMat
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Re: Pro38 Forward Closure failures bulletin from CTI

Postby SpaceManMat » Mon Aug 22, 2016 2:04 pm

Thanks Blake, will do. I'll bring it to QRS next month for you to cehck.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing


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