Aerotech reloads certified for CTI hardware?

The Rocketry Forum

Help Support The Rocketry Forum:

jrkennedy2

Well-Known Member
Joined
Sep 14, 2014
Messages
455
Reaction score
12
Location
Colorado
Is there a list showing what Aerotech reloads can be used in CTI motor cases, if any? In some of my CTI (75 & 98mm) reloads they include AT O-rings...

I searched for it but got so many hits I could not find that info.

Thank you!
 

Steve Shannon

Well-Known Member
TRF Supporter
Joined
Jul 23, 2011
Messages
7,128
Reaction score
4,199
Location
Butte, Montana
Only the AT 75mm loads have been certified in CTI hardware. Here's the actual certification announcement:
RMS/CTI Case Cross Certification

Finally, most all Aerotech 75 MM 2, 3 and 4 grain motors have been certified for use in the equivalent CTI 75-2g, 3g and 4g cases, WITH the following restrictions. The supplemental instructions are required to be followed to the letter in regards to both seal placement and positioning of the nozzle bushing. Also, as any Medusa nozzle reload will be recessed in said bushing, certain Medusa motors will not be compatible due to expansion restrictions. All Single Throat motors (including single throat Medusa) should be good to go in that regards. Contact Aerotech for specific details on both the instructions and specific motors not applicable to this certification (especially older, legacy reloads!).

Also, see the video here:
https://youtu.be/d0xjmJ-Yur8
And read the comments


Steve Shannon
 

jrkennedy2

Well-Known Member
Joined
Sep 14, 2014
Messages
455
Reaction score
12
Location
Colorado
Thank You!

Is there any particular contact at AT I should try?

Good to know most 3&4 grain reloads (75mm) are applicable.
 
Last edited:

timbucktoo

Well-Known Member
Staff member
TRF Supporter
Global Mod
Joined
Jun 13, 2014
Messages
8,774
Reaction score
1,565
Location
Cocoa Beach
Here is a cross load list for 75mm motors:

IMG_2619.JPG
 

Steve Shannon

Well-Known Member
TRF Supporter
Joined
Jul 23, 2011
Messages
7,128
Reaction score
4,199
Location
Butte, Montana

FastAsleep

Geezer In Training
TRF Supporter
Joined
May 22, 2014
Messages
75
Reaction score
3
Flew my second AT motor at GHS. (The first was a G75-7 DM earlier this year).
The Blue Moon with an AT M1850 in a 6G 75mm CTI case went to 8700' at GHS on 11/05/17.

This was my 7th 75mm motor - 6 CTI and 1 AT and I wanted to point out some differences:

1. I had to peel some of the paper off the grains to fit them in the liner that came with the reload. (I read about that trick on another TRF post.)

2. You have to supply the igniter and its support tube, something that comes standard with CTI motors. 75mm motors cost about the same from both manufacturers so I'm not sure why AT doesn't provide them.

3. With the exception of a youtube video that AT posted about building the crossloads I couldn't find any documentation. CTI motors come with instructions on building their 75mm motors in both CTI and RMS hardware.

Having done it once there is no reason I wouldn't fly AT crossloads again in CTI hardware.
 

Nathan

TRF Supporter
Joined
Apr 20, 2012
Messages
2,168
Reaction score
537
Thanks for the info. I have two 75mm AT loads that I plan to fly in CTI hardware, K1000T and L1150R. And as you said, AT provides no instructions for using their loads with CTI hardware.
 

Dave A

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 22, 2013
Messages
1,190
Reaction score
155
I had the same issue with my M1850 last year, I didn't peel any paper and it almost didn't go together but it worked great. I actually flew it in a Loki 75-8000 case with hubcap and custom -cut CTI 75mm spacer.
A lot of Level 3 guys like using their own or home made ignitors and dowels. I use a Quikburst 1/4" diameter "twiggy" inside a 50-50 pellet, those work every time. I use the same igniter for 54 and 75 reloads, of course pellet not needed in the 54s.

Sent from my SM-G935V using Rocketry Forum mobile app
 

Dave A

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 22, 2013
Messages
1,190
Reaction score
155
I have an AT M1315 loaded in that Loki case with an extra spacer. I'll load the next M1850 in the CTI 6g case.

Sent from my SM-G935V using Rocketry Forum mobile app
 

Latest posts

Top