While making motors equivalent to the commonly available, medium thrust motors already out there makes sense in the long run, I'd say that the differentiated products should be first. 29mm cored BP motors - woo hoo! I never go to play with any of these (eg, F100, et al) but I am chomping at the bit.

Likewise, I want to see cored 24mm versions, too. D30, E40. In 18mm, a C20 to go with the B14 (if it's possible...to fit in that much impulse/powder along with a deep core).

If the reliability problems of cored motors can be solved/avoided, then it's possible to position these fast burn/high thrust motors against medium thrust motors. IOW, almost any rocket than can fly on a B6-6 can fly on a B14-6 without adverse consequences. So a high thrust motor can be sold into mainstream applications as well as heavy lift.

OTOH, while low thrust motors are fun, they can't cross over into medium thrust applications without lots of complaints and/or warrany claims. So the high thrust motors should have the best potential for getting a return on investment in a timely fashion. IOW, save the low-thrust and medium thrust motors for later.

I wonder about reliability and cost. I've heard that some large BP motors had fiberglass cases. If that's what it takes, then I wonder if the added cost will pose retail price problems. I'm willing to pay extra, but I worry about others.

Seeing Carl's old catalog along with the AVI motors, the idea of adjustable delays is stuck in my head. If I understand it correctly, a booster motor plus DECAP makes a delay motor, right? Will it be possible for the user to trim the delay before gluing it in? Will it even be sold in pieces to allow that?

The potential beauty of this is that only two pieces are required (plus glue) to make a myriad of delay options. Looking at Aerotech thru an accountant's eyes, I was able to learn the huge costs they have tied up in delays and delay spacers. They have over 20 of each for their 29 and 38mm motors. Cesaroni has 1. They use the same delay grain in all 38's and (I think) 54's. It may be 13 secs in one motor and a 15 in another, but it's the same delay. 1 inventory item. (BTW, with BP motors, there will be no variations due to motor burn pressure since the delays don't light until motor burnout.)

From a manufacturing perspective, delay grains would be cranked out along with 0 delay motors. Advanced users - us - would buy these two piece motors and use them however we need - eg, C20-0, C20-5, C20-10. But ordinary retail channels can be served with pre-trimmed, pre-glued products as well. However, these would be built up using the same two pieces. There would be no large factory inventories of pre-trimmed, pre-glued motors.

Again, I'm not sure it's possible to build a trimmable delay for BP motors. One experiment I have yet to try is gluing an AT delay into a BP booster motor. If it will light, then it will be possible to trim custom delays with that method. I do wonder if having an APCP delay and BP together poses any sore of shelf life issues.

I also wonder about assembly issues. There needs to be a way to reliably glue the delay in without getting glue on the delay face while getting a good seal around the delay.

Anyway, the idea of a universal motor-delay combo is very tantalizing. There's a potential for having wide variety without proliferation of parts/part numbers.

So, in summary, I'll take:

29mm F100-adj
24mm E40-adj
24mm D30-adj
18mm C20-adj
18mm B14-adj
13mm 1/2A8-0T

Doug