Reloadable Motor System 29/40-120

Likely thousands of people have used this case. As for the claim that a cesaroni 2 grain case is $22 with rear closure.... it's not. the closure is another $18. Then the reloads are around $20, whereas the aerotech reloads are 10-15. I'm not bashing CTI here, I own full sets for 29 and 38mm. But the comment bashing the AT 29 40-120 is just out of line. Take your time, put it together properly, clean it well after use, and it's a great investment with many great motors. I own two and am planning to buy more just to save on loading time.

This motor casing allows a wide range of propellant types and motor classifications to be used for mid power rocketry. The case is reuseable for an unlimited number of flights. Just unscrew the forward and rear closures, remove the spent propellant kit, clean and grease the casing and reload. The directions do need to be followed closely, if a part is put in the wrong place it could cause the motor to CATO. The casing pays for itself in 3-4 flights when you compare the cost of single use motors to the reload kits that are available.

1) These should not cost anywhere near $45 retail. An equivalent Cesaroni Pro29 2-grain casing is $22 retail, including the rear closure. A 3-grain with spacer is roughly $12 more, and then you have 23 different 29mm motors to choose from. 2) In less than 2 years, I've been through two of these, along with two (separately sold) rear closures. The manufacturing tolerances seem to be... questionable, and heaven help you if you don't buy the extra $15 tool to help you screw the rear closure down all the way. 3) Every Aerotech reloadable motor requires 10 minutes of construction -- seal disks, rubber gaskets, grease, etc. In the winter with the wind blowing, there's absolutely zero fun in putting together motors on the field inside these casings. Contrast that with Cesaroni's Pro29/Pro38 series -- literally the hardest thing about the CTI motors is taking the staples out of the cardboard the reloadable motors are packaged in. After that, it's a matter of adjusting the delay and screwing it in. (To be fair, you pay more for this convenience, but the opportunity for failure is also lower.) Putting it in perspective: I _started_ my mid-power rocketry journey with the Aerotech 29/40-120 RMS system. I got one flight in (with supervision from those far more experienced than I) before there were issues that resulted in me having to purchase a second one. I chalked that up to stuff happens, and continued to use up the stockpile of AT motors I'd bought. At the last launch, I decided to use up some more of that stockpile, and the upper seal let go on a baby F53FJ, melting away the upper delay section (metal!) and burning the rocket to ashes on the pad. Net: I'm giving all my AT F/G/H motors and 29/40-120 casing away at the next launch.