Quick answer

The AeroTech I229T-14A RMS-54/426 Reload Kit (092215) is a 54mm reload kit that requires you to already own RMS-54/426 motor hardware and to install a 54mm small nozzle aft closure (54ACCSN) during assembly. The -14A suffix means a 14-second adjustable delay, so you set the final delay before flight rather than accepting a fixed value. If you need a replacement delay element, match it to the specific reload: CRDK54-06 for the I215R, and CRDK54-04 for the I115W and J180T.

What the I229T-14A kit actually contains

The AeroTech RMS system is an aluminum-cased reusable motor supplied in kit form. The I229T-14A is the reload portion, not a complete motor. You supply the RMS-54/426 hardware, and the reload kit supplies the propellant, liner, and the delay and ejection components that are consumed on each flight. Because the case is reused, the per-flight cost drops after the first hardware purchase, which is the main reason flyers standardize on one case size.

Hardware and closure requirements before you build

This reload requires the RMS-54/426 motor hardware set. Hardware is available as a complete set or as individual parts, so you can replace a single damaged component without buying the whole assembly. The I229T-14A also requires a 54mm small nozzle aft closure, part number 54ACCSN, during assembly. If your 54mm hardware was set up with a different aft closure, swap it before you start; the closure is not optional and it is not included in the reload kit.

How to adjust the I229T delay

The -14A designation means a 14-second adjustable delay. You set the delay to match your rocket and flight profile rather than flying a fixed delay. Adjust the delay before final assembly, using the delay adjustment tool and the instructions supplied with the reload kit. A delay that is too long risks a late ejection and a hard landing; a delay that is too short risks ejection while the rocket is still moving fast. If you are unsure, start with the manufacturer's recommended setting for your rocket's weight and expected altitude, then adjust after you have flight data.

Which CRDK54 delay kit fits which reload

Delay kits are reload-specific, so the part number matters. The CRDK54-06 is for the RMS-54 I215R Redline reload using the 14-second adjustable delay. The CRDK54-04 is for the RMS-54 I115W White Lightning and J180T Blue Thunder reloads using the 14-second adjustable delay. Both kits include one delay element plus insulators and spacers if needed. Other delay parts come with the reload kit itself, so you only buy the CRDK when you need to replace the delay element or its insulators. High Power RMS reload delay kits are not compatible with Mid Power RMS products, so do not substitute a mid-power delay kit.

Common assembly mistakes to avoid

The most frequent error is forgetting the 54ACCSN aft closure or installing the wrong closure for the nozzle. The second is mixing delay components between reloads; keep each CRDK54 kit with the reload it belongs to. The third is setting the delay after the motor is fully assembled, which means disassembly and a new delay element. Work from the instructions, lay out the parts in order, and confirm the closure and delay setting before you close the motor.

I229T-14A quick reference

Do I need motor hardware?

Yes. The I229T-14A is a reload kit for the RMS-54/426 aluminum case, which is sold separately as a complete set or as individual parts. No hardware means no flight; confirm your case size before ordering.

Which aft closure?

The I229T-14A requires a 54mm small nozzle aft closure, part 54ACCSN, installed during assembly. Check your closure before you open the reload kit.

How do I set the delay?

The -14A is a 14-second adjustable delay. Set it before final assembly using the supplied instructions and delay tool. Set once, then verify before closing the motor.

Which delay kit do I buy?

CRDK54-06 fits the I215R; CRDK54-04 fits the I115W and J180T. Both use the 14-second adjustable delay. Match the CRDK number to the reload, not to the case.

Product facts

  • AeroTech I229T-14A RMS-54/426 Reload Kit (1 Pack) - 092215: AeroTech Reloadable Motor System RMS is an aluminum-cased reusable motor in kit form assembled by the user; RMS-54/426 hardware is required and sold separately as a complete set or individual parts; a 54mm small nozzle aft closure (54ACCSN) must be installed during assembly. Budget for the hardware once, then buy reloads; confirm you have the 54ACCSN closure before starting assembly.
  • AeroTech RMS-54 I215R Complete Reload Delay Kit - CRDK54-06: CRDK54-06 is for RMS-54 I215R Redline reload motors using the 14-second adjustable delay; includes 1 delay element plus insulators and spacers if needed; High Power RMS reload delay kits are not compatible with Mid Power RMS products. Buy this CRDK only if you fly the I215R; do not try to fit it to a mid-power motor.
  • AeroTech RMS-54 I115W / J180T Complete Reload Delay Kit - CRDK54-04: CRDK54-04 is for RMS-54 I115W White Lightning and J180T Blue Thunder reload motors using the 14-second adjustable delay; includes 1 delay element plus insulators and spacers if needed. One delay kit covers two different reloads, so you can stock one part number for both if you fly those motors.