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  #1  
Old 08-02-2019, 02:53 PM
metlfreak metlfreak is offline
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Default 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.
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  #2  
Old 08-02-2019, 04:16 PM
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Carl passed away and SEMROC is no more. eRockets now produces some of the SEMROC kits and components.
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  #3  
Old 08-02-2019, 04:43 PM
chrism chrism is offline
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Quest has not put out any new rockets in years.
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  #4  
Old 08-02-2019, 05:48 PM
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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.
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Old 08-02-2019, 09:12 PM
Scott_650 Scott_650 is offline
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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.
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  #6  
Old 08-02-2019, 11:15 PM
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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.
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  #7  
Old 08-03-2019, 05:40 AM
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Is there a booster version of the Q-Jet 'D'?
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  #8  
Old 08-03-2019, 05:49 AM
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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.
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  #9  
Old 08-03-2019, 06:46 AM
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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
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Last edited by Jerry Irvine : 08-03-2019 at 07:29 AM.
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  #10  
Old 08-03-2019, 07:37 AM
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Jerry Irvine Jerry Irvine is online now
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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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Exemptions not regulations. Please support DOT treating slow burning solids as not subject to HMR. 2015 NAR President declines!
U.S. Rockets instaship. http://bit.ly/1aca7mA Please buy some rockets.
The O administration believed in tax, spend, borrow, fine, mandate, monologue. D voters will soon be very happy with the election outcome!
Model rocketry is as safe as safe can be defined in human existence. Bow and pray: GH Stine, Orville, Vern, Lee, Lonnie, Carl, etc. No, really.
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