HEY !
I like rambling threads without clear goals.
If you don't have a goal, you can't miss the goal.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !

"As narrow as possible" (as close to minimum diameter as possible).

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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR

https://www.questaerospace.com/25-P...5_18343624.aspx

Click on the photos and scroll through to see the newest version of the packaging which now shows the curves for the A3, B4, C14 and D16 18mm motors.

Kewl.

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-Fred Shecter NAR 20117 (L2)
Southern California Rocket Association, NAR Section 430

The Featherweight Raven 3 is light and small. It is suited to not quite minimum diameter single stage single deploy and dual deploy and 2 stage flights.

We use 2 for 2 stage dual deploy on both stages, on 75mm, 98mm, 152mm minimum diameter motors with fins on them.

Jerry

With a 3+ lb immediate thrust off the pad for the C14, 5.0 oz max recc liftoff weight is RIDICULOUSLY low. Even the 10oz max for the D16 is ridiculously low.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !

The D16 is barely more than a C. It's 11.8 N/s. That's probably why its max is 10oz.
While the peak is short, the Estes D12 is nearly 17 N/s and the peak is about double the Quest motor's.

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I love sanding.

Errortech/Q is trying to have a BP alternative on a mass-market basis. On that basis they might succeed. After 18mm they can do 24mm and 29mm. Theme that cannot survive the spellchecker and deep checker
.

Here's a direct link to the image:
https://d13z1xw8270sfc.cloudfront.n.../b4-42-fold.jpg

One interesting thing: the curves show thrust starting near maximum at t=0. Can that be right? A C11 peaks higher but takes about .3 s to get there. If the Q-jets really fire up that fast, they could be very good for getting speed off the rod.

Based on those curves, the C should be a very serviceable substitute for the C11 in many situations, I think. I need to get that data into OR and see how it behaves. The D16 could serve well in that application as well. Need to see what they cost.

These motors better have a real-world street-price close to what BP costs or the A & B will never sell. The C14 and D16 will fill a void that exists. Both should be great in a Mars Lander.
The D should be at least 14n-sec though. Otherwise it better be priced barely above a BP C.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !

C11 has less total impulse than the C14, but the peak thrust is a little more comparable to the D16. I'd probably go with the D16 in a Mars Lander unless I had one built with a 24mm mount and a stash of C11-3's.

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I love sanding.