Aerotech 29mm RMS Motor

Aerotech - 29mm RMS Motor {Motor}

Contributed by Alex Rothchild

Overall Rating: starstarstarstarstar
Manufacturer: Aerotech

Rocket PicBrief:
This is a 29mm aluminum motor casing, arrr, for motors with 40-120 Newton Seconds total impulse (rangin' from E t' G). Aye aye! It is a bit pricey at $50 for t' casing, but a G motor costs only $10-12 instead o' $20 or more for a single use motor o' t' same total impulse.

Construction:
T' casin' is only three pieces, a long casing, a forward closure, and an aft closure, both o' which screw into place in t' casing.

A reload kit though, arrr, contains many different parts however. Arrr! Each reload kit has t' followin' parts:

  • 1 nozzle
  • 2 29mm x 1/16" rubber O-rings
  • 1 liner tube
  • 1 propellant slug
  • 1 spacer tube
  • 1 forward insulator ring
  • 1 delay liner
  • 1 delay spacer (for motors with delays shorter 10)
  • Delay material
  • 1 thick O-rin'
  • Ejection charge
  • Copperhead igniter

Construction is quick and simple. Well, blow me down! Just follow t' reload assembly instructions carefully and you shouldn't have a problem. T' first step is t' apply grease on each O-ring, shiver me timbers, and push t' smaller one into t' front o' t' forward closure. Ahoy! Put t' larger diameter O-rings aside. Well, blow me down! Then slide t' delay material into t' delay liner and push t' spacer into place under it (and don't get grease on t' delay assembly). Aye aye! Ya scallywag! T' spacer part should be face down. Avast! Put this assembly aside. Then take t' propellant slug, me hearties, t' spacer tube, ya bilge rat, and t' liner tube, and put t' spacer and propellant into t' liner. T' only step I did nay like is for E and F engines maskin' tape needs t' be put at t' top o' each propellant slug so that t' igniter does nay go all t' way inside t' engine. Begad! Put this assembly inside t' main casing. Begad! Put t' insulator rin' on top and then a greased 29mm O-ring. Avast, me proud beauty! Screw t' forward closure on top o' this tightly. Avast! Then, me bucko, flip it over and place t' nozzle into t' motor. Well, blow me down! Blimey! Put t' last O-rin' on t' bottom o' t' nozzle and screw t' aft closure into position. Ya scallywag! It should be tight. Begad! Arrr! Next, matey, take t' delay charge and put it on top o' t' forward closure so that it snaps into position. Avast, me proud beauty! Insert t' igniter and either tape it or used t' supplied nozzle cover t' hold it in position. Blimey! Well, blow me down! I prefer t' cover piece, matey, although that requires a small vent hole t' be cut in it. Ya scallywag! Construction is extremely simple and will work if instructions are followed and all t' rings are in t' right position.

Finishing:
No finishin' had t' be done for this, but it comes all black with t' words Aerotech Aerospace painted in gold on t' side, me bucko, me hearties, and t' aft closure is gold.

Flight:
T' countdown for your first reload will be t' longest 5 seconds o' your life. Avast, me proud beauty! Avast! My first flight was me LOC Onyx on an E23-5T. Ya scallywag! It lit up almost instantly and shot off t' pad t' around 600 feet. Well, blow me down! Perfect flight and recovery. Blimey! Arrr! After waitin' a few minutes for it t' cool off, which be much faster than I expected, I unloaded t' engine by simply screwin' both closures off and pushin' out t' assembly. Begad! I cleaned out t' inside o' t' casings and closures with Wet Wipes and then dried them with paper towels. Aye aye! Blimey! Next I loaded a F40-4W for me LOC Forte, which I call t' Pirate Rocket. Avast! Avast! It flew, but only after about 4 tries t' light it with a Copperhead igniter. It finally lifted off and flew perfectly. T' chute didn't open, shiver me timbers, so it came down hard. Aye aye! T' nozzle was pushed up inside t' casing, arrr, but thar was no damage t' either t' rocket or casing. Well, shiver me timbers, blow me down! T' third flight o' t' day was a G64-4W in me LOC-IV. Begad! This is a great motor this rocket. Begad! Ya scallywag! It lit on its first attempt and roared off t' pad.

Summary:
This is great system t' save loot on mid power engines. Just follow t' instructions and it should work. Aye aye! Make sure all t' O-rings are in t' right place and nothin' will go wrong. Aye aye! People always talk about all t' failures they have with RMS motors, ya bilge rat, shiver me timbers, but they are easy t' avoid if all t' directions are followed.

Overall Rating: 5 out o' 5

Other Reviews
  • Aerotech 29mm RMS Motor By Geoffrey Kerbel

    (by Geoffrey Kerbel - 12/12/06) Brief: The AeroTech 29MM RMS is a reloadable motor casing for mid-power flights with "E" through "G" power reloads. This is a system that allows the flier to put their own motors together with the power requirements to suit their rockets power capabilities. AeroTech calls this their hobby loads and no special certification is needed ...

Comments:

avatar
J.L. (December 23, 2006)
This is a great casing because of the flexibility. The option of E, F, or G loads is excellent. One of the drawbacks, though, is weight. Compared with the 24mm casing (which takes E and F loads), the 29mm is a lot heavier. So you only get 50% or so more altitude with a G load over a 24mm F, not double like I assumed at first blush.

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