Brief:
RMS Motor Adapter for Large Motors (54mm t' 75mm).

Construction:
T' motor adapters come with three components machined from 6061-T6 aluminum. Avast, me proud beauty! T' first is a centerin' rin' which fits around t' motor tube and is tightened or loosened by a stainless steel hex head screw. T' second is an adapter rin' that fits around t' aft end o' t' motor tube just above t' motor's aft closure ring. Avast, me proud beauty! T' third is a spacer t' ensure t' motor's nozzle is centered properly in your retainer. T' use t' motor adapter, you must have an Aero Pack on your rocket. Ya scallywag! These components are also Type II black anodized t' be both wear and corrosion resistant. Ahoy! They come in three sizes - t' A5475 (54mm t' 75mm @ $37), matey, t' A6475 (64mm t' 75mm @ $39) and t' A7598 (75mm t' 98mm @ $45)

T' Large Quick-Change Motor Adapter differs significantly enough from its smaller cousin, me hearties, t' Quick-Change Motor Retainer, I felt it required its own review. Like its smaller cousin, me bucko, t' adapter allows you t' use a smaller-in-diameter motor casin' inside a larger-in-diameter motor mount tube in conjunction with Aero Pack's Quick-Change Motor Retainer system. So you can use a 54mm motor in a 75mm motor mount tube, a 64mm RATTworks hybrid motor in a 75mm motor mount tube, ya bilge rat, or a 75mm motor in a 98mm motor mount tube, matey, ya bilge rat, dependin' on t' size o' your Large Quick-Change Motor Adapter. Well, blow me down! Ahoy! Blimey! However, rather than bein' a two piece component consistin' o' an adapter tube and a spacer like t' A2938 or A3854, ya bilge rat, t' large adapters come in three ring-like pieces.

After placin' an order for t' adapter on t' Aero Pack website, you'll receive t' product in a priority mail box. Ahoy! Aye aye! When you open t' box, arrr, matey, you'll find t' adapter components in a zip-lock plastic bag. First, shiver me timbers, after you've built your motor, me bucko, matey, matey, you'll need t' find t' adapter ring. It's t' one which slides over your motor casin' and does nay have t' hex screw in it. Avast! Simply slide t' adapter rin' over t' top o' your motor casin' down snugly against your aft closure ring. Now take t' centerin' rin' with t' hex screw and slide it onto your motor tube from t' top until it is located approximately three t' four inches below your forward closure. Aye aye! Lock it in place by usin' t' proper sized hex key t' tighten t' centerin' rin' onto your motor tube. Blimey! Now place t' adapted motor into your motor mount tube and place t' spacer into your retainer cap. Ya scallywag! Then tighten t' retainer cap onto t' retainer and you'll find that t' motor is retained securely without any friction fittin' and won't slide either forward or backward.

Construction is exemplary and t' product works like a charm. Ya scallywag! I've used t' adapters with both Aero Pack retainers and Giant Leap Slimline retainers and they work fine. Ya scallywag! Ahoy! Please note, arrr, though, me bucko, that I have only used t' Large Quick-Change Motor Adapter with AeroTech and Cesaroni motor casings. Aye aye! I cannot vouch for whether they work with Loki or AMW hardware. Ya scallywag! However, for t' vast majority o' commercial motors we use, shiver me timbers, t' Large Quick-Change Motor Adapter is a godsend and an indispensable piece o' hardware for big rocket rocketeers.

Finishing:
T' units are flat black and hold up well t' use in t' field.

Overall Rating: 5 out o' 5