75mm reloads

[Steven88]

Is someone able to tell me how to tell how many grains each 75mm casing takes specifically the three shortest casings or else tell me where to look for that information? I am not able to find that information anywhere on the sites that sell the reloads. Eventually am interested in a one and two grain casing. Thanks

 

[3stoogesrocketry]

Is someone able to tell me how to tell how many grains each 75mm casing takes specifically the three shortest casings or else tell me where to look for that information? I am not able to find that information anywhere on the sites that sell the reloads. Eventually am interested in a one and two grain casing. Thanks

Roughly 1280ns per grain.

 

[tim cubbedge]

Shortest CTI case in 75mm is 2 grain. Link to website.
https://www.pro38.com/products/pro75/hardware_pro75.php

Shortest 75(6) mm case in Loki is 3 grain. He sells 3, 5 & 7 grain cases.

 

[MikeyDSlagle]

Aerotech uses impulse class, like the stooges mentioned, 1280 per grain is a good way to remember.
75/1280 - 1 grain
75/2560 - 2 grain
75/3840 - 3 grain
CTI is easy.
Pro75 2G, 3G. G is short for grain. They don't have a 1G

Loki uses impulse class to with the shortest being the 76/3600 or, as Tim said, 3 grain.

I would like to see more 75mm 1 grain motors.

 

[heada]

AMW had a 1 grain case as a 75/1700 and a 2 grain case as a 75/2500. I have their grey 75/2500 and 2 reloads for it still. I also have a 3 grain gold AMW case but no reloads.

I have a purple Woody 75mm 2 grain case and 3 grain case but they're strictly EX.

 

[MikeyDSlagle]

@heada You know you can buy Loki internals and fly Loki in that AMW? A hubcap and you can fly CTI and AT.

 

[heada]

@heada You know you can buy Loki internals and fly Loki in that AMW? A hubcap and you can fly CTI and AT.

Yeah, I know. I have most of the 38mm Loki line(120-740), half the 54mm Loki line(2000 and 2800) and 2 75mm Loki cases (3600 and 6000). I'll do my L3 on a Loki M1882 in the 75mm 6000 case. I've considered getting the hubcap but I don't fly much AT or CTI any more and Loki reloads meet my needs. I'd love for Loki to come out with spacers for their cases. Would be stupid simple as you'd only need some thick wall 6061 that has the OD match the ID of the case. Put it between the forward closure and the forward snapring.

If the original poster is willing to go EX, you can use a larger case with a spacer to get down to a single grain motor. If you do that, make sure to pay attention to the nozzle size.

 

[MikeyDSlagle]

Yeah, I know. I have most of the 38mm Loki line(120-740), half the 54mm Loki line(2000 and 2800) and 2 75mm Loki cases (3600 and 6000). I'll do my L3 on a Loki M1882 in the 75mm 6000 case. I've considered getting the hubcap but I don't fly much AT or CTI any more and Loki reloads meet my needs. I'd love for Loki to come out with spacers for their cases. Would be stupid simple as you'd only need some thick wall 6061 that has the OD match the ID of the case. Put it between the forward closure and the forward snapring.

If the original poster is willing to go EX, you can use a larger case with a spacer to get down to a single grain motor. If you do that, make sure to pay attention to the nozzle size.

Looks like you're set.
CTI has spacers in 75mm and Aerotech has the RAS in 75mm so it neither would be EX. The spacers fit Loki but that would be EX

 

[3stoogesrocketry]

AMW had a 1 grain case as a 75/1700 and a 2 grain case as a 75/2500. I have their grey 75/2500 and 2 reloads for it still. I also have a 3 grain gold AMW case but no reloads.


AMW 75mm 1700ns case holds 3 half length grains , not one grain . The K470 is one heck of a nice motor.

 

[JDcluster]

Actually it was 2 short grains in the 75 mm x 1700 case.

AMW had a 1 grain case as a 75/1700 and a 2 grain case as a 75/2500. I have their grey 75/2500 and 2 reloads for it still. I also have a 3 grain gold AMW case but no reloads.

 

[heada]

Actually it was 2 short grains in the 75 mm x 1700 case.

Yup, I was corrected just above your post. I didn't have that case so I didn't know.