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AeroTech said:
Completely different. It can handle more heat and has a nozzle extension that allows more room in the case for propellant.

The actual market for the D10 and D21 was very small.

I’d be curious to know how many would be willing to participate in an Indiegogo campaign to help finance a new mold.
Click to expand...

I really like the D10-3W for the Estes Redstone. If I built the Redstone again, I'd build it for a stock Estes D engine, and not the C6-3. We've launched it multiple times, and it always weathercocks badly on the C6-3, but not the D10-3. The use of a chute release makes recovery a breeze on the higher altitude of the D.
 
TheRealZaphodb said:
But Aerotech didn't make a 0 delay AFAIK. So where did you get these?
Click to expand...
When I got into high power in the late 80's you could get -0 motors. However, if the delay was short for any reason, you would have blowby. Long wouldn't be an immediate ignition of the nextmotor. We always had to use fast Thermalite from the touch hole up into the upper stage motor.
 
AeroTech said:
A batch of casings were received from the vendor that were not sufficiently reliable, and we had no recourse with them, or assurance that it would not happen again. Making new molds for stronger cases would have cost more than we were willing to spend. That’s when we pulled the plug.
Click to expand...
How much prebuy would it take to make you change your mind? I really like your D motors, and would actually really like a 0 delay one to use as a booster for the Estes Loadstar II. Estes C just doesn't have the oomph to stop weathercocking even with just a Jolly Logic altimeter.
 
TheRealZaphodb said:
How much prebuy would it take to make you change your mind? I really like your D motors, and would actually really like a 0 delay one to use as a booster for the Estes Loadstar II. Estes C just doesn't have the oomph to stop weathercocking even with just a Jolly Logic altimeter.
Click to expand...
Have you tried Q-Jets? While the D16 doesn't have the total impulse of a D10/D21, the D16 and the C12 Q-Jets have significantly more thrust off the pad than an Estes C6. If you want a booster with more impulse, try the C11-0 or D12-0.
 
Probably at least 1,000 motors to justify the tooling cost.

TheRealZaphodb said:
How much prebuy would it take to make you change your mind? I really like your D motors, and would actually really like a 0 delay one to use as a booster for the Estes Loadstar II. Estes C just doesn't have the oomph to stop weathercocking even with just a Jolly Logic altimeter.
Click to expand...
 
AeroTech said:
The actual market for the D10 and D21 was very small.

I’d be curious to know how many would be willing to participate in an Indiegogo campaign to help finance a new mold.
Click to expand...

To be absolutely clear, does this decision affect all D10 motors: all delays? I've seen the D10-7W has been discontinued for a while.

If so, I'm disappointed to see them go. I just "discovered" them last year with my Little Joe II. I use the D10-5 to get that up to about 900'. Beautiful flights.

Indiegogo campaign? Maybe, but perhaps I'd rather see some additional 18/20 loads. Maybe the return of an E ?

This may be the kick in the pants I need to get the 18/20 hardware and try the D13 reload. IMO, the 18/20 hardware needs reloads that deliver something not readily available in single use disposable motors. Cleaning motor hardware isn't high on my list of "fun" things to do!

That D10 hit a sweet spot of added performance while not ripping fins off my low power rockets. I was looking forward to using more of them.
 
Last edited:
AeroTech said:
Probably at least 1,000 motors to justify the tooling cost.
Click to expand...
I get the feeling that the people who want to use these 18mm composite motors would be willing to do some of the work themselves. I'm not sure how feasible this would be for you but perhaps you could get 18mm filament wound tubing instead of molded casings and have the end users epoxy the motors together themselves?
 
dpower said:
Have you tried Q-Jets? While the D16 doesn't have the total impulse of a D10/D21, the D16 and the C12 Q-Jets have significantly more thrust off the pad than an Estes C6. If you want a booster with more impulse, try the C11-0 or D12-0.
Click to expand...
On Quest's site I see no 0 delay motors.
 
TheRealZaphodb said:
On Quest's site I see no 0 delay motors.
Click to expand...

Currently there a NO zero delay motors of any type of APCP (and Q-jets are APCP) from any manufacturer that I am aware of unless its an endburning motor of which there is no delay element period. The D10 listed in earlier post is the cert document and clicking on the D10 link shows them available as -3,-5, or -7 delay lengths only.
 
I can't see how that is any easier than loading and cleaning an 18mm reload, which is actually pretty quick and simple.

Maxwelljets said:
I get the feeling that the people who want to use these 18mm composite motors would be willing to do some of the work themselves. I'm not sure how feasible this would be for you but perhaps you could get 18mm filament wound tubing instead of molded casings and have the end users epoxy the motors together themselves?
Click to expand...
 
Yes, it affects all D10s. I'm not aware of any D10-0s being available from AT, at least in the last 20 years.

CoAz2k said:
To be absolutely clear, does this decision affect all D10 motors: all delays? I've seen the D10-7W has been discontinued for a while.

If so, I'm disappointed to see them go. I just "discovered" them last year with my Little Joe II. I use the D10-5 to get that up to about 900'. Beautiful flights.

Indiegogo campaign? Maybe, but perhaps I'd rather see some additional 18/20 loads. Maybe the return of an E ?

This may be the kick in the pants I need to get the 18/20 hardware and try the D13 reload. IMO, the 18/20 hardware needs reloads that deliver something not readily available in single use disposable motors. Cleaning motor hardware isn't high on my list of "fun" things to do!

That D10 hit a sweet spot of added performance while not ripping fins off my low power rockets. I was looking forward to using more of them.
Click to expand...
 
AeroTech said:
I can't see how that is any easier than loading and cleaning an 18mm reload, which is actually pretty quick and simple.
Click to expand...

My 2 main experiences with the OOP 18mm composites both wouldn't have been as feasible with reloads. The first was when a friend who works for ULA made a scale model of their upcoming Vulcan rocket and he used D10s in the SRBs. While he could've bought 6 casings, the economics strongly favored single use for that application. My other experience is ongoing. I purchased some D21-7s before they disappeared and I'm trying to use them to break mach 1. Simulations say it's just barely possible with the lighter single use motors, but unfortunately I don't get close with the reloads. Additionally, the risk of losing such a rocket is high, and I'd prefer not to lose a casing as well.

You're right though, reloads are the way to go for the vast majority of people. My use cases are rather niche and probably not worth it from a business perspective, and that's entirely understandable.
 
Maxwelljets said:
My 2 main experiences with the OOP 18mm composites both wouldn't have been as feasible with reloads. The first was when a friend who works for ULA made a scale model of their upcoming Vulcan rocket and he used D10s in the SRBs. While he could've bought 6 casings, the economics strongly favored single use for that application. My other experience is ongoing. I purchased some D21-7s before they disappeared and I'm trying to use them to break mach 1. Simulations say it's just barely possible with the lighter single use motors, but unfortunately I don't get close with the reloads. Additionally, the risk of losing such a rocket is high, and I'd prefer not to lose a casing as well.

You're right though, reloads are the way to go for the vast majority of people. My use cases are rather niche and probably not worth it from a business perspective, and that's entirely understandable.
Click to expand...
The shorter delay is a hair lighter in weight :)
 
I'm looking to buy a 54 RAS. The picture on Wildman's site shows 3 spacers, 1 shorter than the other 2. What is the short spacer for? Thanks in advance.
 
Duster45 said:
I'm looking to buy a 54 RAS. The picture on Wildman's site shows 3 spacers, 1 shorter than the other 2. What is the short spacer for? Thanks in advance.
Click to expand...
the shorty is ONLY for the 2800 case, and it drops to a 2560. kinda like ceso 6XLs
 
Are there any news on shipping of AT motors to the European reseller ?
I just got a message saying that my big order(along with many others) expected for the beginning of February is on hold, no explanation and no expected delivery date given. For the time being there is no hurry as everything is shut down here, but I'm a bit worried as I had to put money upfront 3 months ago.
 
Does Aerotech still manufacture/support the 32mm RMS glider motors? Checked the site, and all I see is the 24mm RMS system.
Thanks,
Allen
 
We've had repeated problems with FedEx taking the shipments, we are now working with a new freight forwarder to try and get things moving again.

giulianr said:
Are there any news on shipping of AT motors to the European reseller ?
I just got a message saying that my big order(along with many others) expected for the beginning of February is on hold, no explanation and no expected delivery date given. For the time being there is no hurry as everything is shut down here, but I'm a bit worried as I had to put money upfront 3 months ago.
Click to expand...
 
Hello. I have a very basic question. I have been flying CTI reloads up until now. I am thinking of investing in 75mm hardware. If I got 75mm cases from AT, which should I buy? Which ones can I add spacers to? If I got a 75/3840 and a 75/7680 I could then possibly add 2 spacers to each and fly all the grain configurations?
Thanks-
 
rocketcharlie said:
Hello. I have a very basic question. I have been flying CTI reloads up until now. I am thinking of investing in 75mm hardware. If I got 75mm cases from AT, which should I buy? Which ones can I add spacers to? If I got a 75/3840 and a 75/7680 I could then possibly add 2 spacers to each and fly all the grain configurations?
Thanks-
Click to expand...
yes that is correct.
 

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