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-   -   Aerotch and Quest merge? (http://www.oldrocketforum.com/showthread.php?t=18016)

metlfreak 08-02-2019 03:53 PM

Aerotch and Quest merge?
 
So I took about 11 years off rocket making due to tons of things but recently decided to get back in it and introduce my son to this awesome hobby....uhhh LOTS have changed I see.
So Quest and Aerotech are merged? Quest no longer makes black powder motors they now only supply composite 18mm motors called Q-Jets?
Aerotech makes q-jets now in place of their D 18mm motors.
Shockingly Aerotchs actually finally came out with a couple new kits I see.
Estes now has F 29mm Black Powder engines!!!
Estes is taking polls to possibly bring back the Gemini Titan!
Some people are saying the Q-Jet motors arent that great. Why not?
Do you think Quest will come out with bigger kits now that Aerotech is making their motors?
Man did I miss a lot LOL.

tbzep 08-02-2019 05:16 PM

Carl passed away and SEMROC is no more. eRockets now produces some of the SEMROC kits and components.

chrism 08-02-2019 05:43 PM

Quest has not put out any new rockets in years.

BEC 08-02-2019 06:48 PM

Iíve flown a lot of Q-Jets and quite a few have been flown here at NARAM both on the sport and contest ranges. Aerotech even supplied Q-jet A3-4s for the Fly It-Take It rockets.

In my opinion the A3s and B4s are OK, the C12 is marvelous and the D16 is a lot of fun in the right models. With the progressive time-thrust curve the D16 in particular makes models go really fast, but not much higher than a C because of the increased drag from going really fast. But it IS fun to watch a model continuously accelerate as the motor burns. With the D16 in particular you can really see that.

Scott_650 08-02-2019 10:12 PM

Quote:
Originally Posted by BEC
Iíve flown a lot of Q-Jets and quite a few have been flown here at NARAM both on the sport and contest ranges. Aerotech even supplied Q-jet A3-4s for the Fly It-Take It rockets.

In my opinion the A3s and B4s are OK, the C12 is marvelous and the D16 is a lot of fun in the right models. With the progressive time-thrust curve the D16 in particular makes models go really fast, but not much higher than a C because of the increased drag from going really fast. But it IS fun to watch a model continuously accelerate as the motor burns. With the D16 in particular you can really see that.


The D16-4 with the 18/24 adapter (iirc I had to shorten an orange engine spacer but that could be for a different rocket) in my Estes Vagabond is an absolute hoot! It just keeps accelerating...until it doesnít. Iím developing an addiction to QJets.

BEC 08-03-2019 12:15 AM

1 Attachment(s)
Quote:
Originally Posted by Scott_650
The D16-4 with the 18/24 adapter (iirc I had to shorten an orange engine spacer but that could be for a different rocket) in my Estes Vagabond is an absolute hoot! It just keeps accelerating...until it doesnít. Iím developing an addiction to QJets.


I donít have a flyable Vagabond at the moment....but I can see that would be a kick. I enjoy putting one of those in the slightly smaller Citation Patriot, which I do have a flyable example of right now.

Another is a good olí Big Bertha.....I flew that combination on Tuesday on the NARAM sport range. 732 feet.

mojo1986 08-03-2019 06:40 AM

Is there a booster version of the Q-Jet 'D'?

5x7 08-03-2019 06:49 AM

Quote:
Originally Posted by mojo1986
Is there a booster version of the Q-Jet 'D'?


No, they don't. There isn't a fool prof way to do that with a composite motor.

Jerry Irvine 08-03-2019 07:46 AM

Quote:
Originally Posted by 5x7
No, they don't. There isn't a fool prof way to do that with a composite motor.
Electronic staging while practical is not commonly adopted. There is an area that could use work. It is pretty common now in the HPR arena, but after seeing a full dataset on a 732 foot Big Bertha flight I have to believe it is practical for MR and LMR now. Featherweight Raven, Transolve P7?

I would like to see that software back out the motor thrust curve data from accel data. You may have to know rocket mass to know power.

http://v-serv.com/usr/kits/sonic2200.htm

Jerry Irvine 08-03-2019 08:37 AM

Quote:
Originally Posted by 5x7
No, they don't. There isn't a fool prof way to do that with a composite motor.
If you offer a variation of a Thermalite igniter (pyro fuse that fits through nozzle), then direct staging is practical either with a BP booster or a APCP booster with the ejection and cap removed so the delay flame touches off the upper igniter. On an APCP booster motor the delay can be drilled down to as low as 2 seconds.

http://v-serv.com/usr/kits/mr2b.htm

http://v-serv.com/usr/kits/3stagedirect.htm

In the olden days (1978 till 1994) we had them selling.

http://v-serv.com/usr/igniter.htm

Jerry

If AT were to make a D16-2, it would be suitable for the Saturn V RTF as well as USS America like rockets. Free bonus! Good booster for direct staged BP or pyro ignited APCP uppers.

http://v-serv.com/usr/kits/tripletrouble.htm


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