Originally Posted by ghrocketman

For some reason the Arrow-300 was fine on C6-0 to C6-0 to C6-7. Possibly due to being extra long.
It obviously is even better on C5-0 boosters.
If we could get even the C5-0 back (barring possible return of the B14-0) it would be a TON better than what we have now.
There is absolutely NOTHING the C6-0 and C6-3 do that the C5-0 and C5-3 doesn't do BETTER.

Originally Posted by LeeR

Finally, I included a picture of MRC Tracker motors, which were manufactured in Germany. I bought a bunch of these in the mid 80s. I think they were made in 1979. They have a plastic nozzle that fits into the nozzle end of the motor, to hold the igniter. A red cap snaps in place to secure the igniter leads. The igniters are uniquely manufactured. Unlike Estes igniters that have a tape strip across them to keep the leads separated, the MRC igniters have a tiny glass bead over the wires to keep them separated.

I have not flown any of these, but a friend bought some at the same hobby store, and they worked flawlessly.

Originally Posted by Initiator001

The MRC Tracker motors were the original German made MRC motors with a wrapper and sold in a two-pack as part of the MRC re-vamped Concept II model rocket product line.

The Concept II product line was announced in 1988 and released in 1989.

I need to write up a history of MRC's short-lived model rocket products. I have pictures of prototypes of the second generation of Concept II model rockets that were never released.