18mm Q-jet C & D Motors now availble to order on QuestAerospace.com

[DankMemes]

picked up one pack each of the C12 and D16 motors, have some heavier models and curious how they'll fly on this, very short burn times but looks to be a good punch off the pad... We'll see..

 

[kuririn]

Pre-orders only, shipping mid to late August.

 

[DankMemes]

Pre-orders only, shipping mid to late August.

Here's hoping for mid-august... Looking forward to the D's especially. Have a vintage Venus Probe thats waiting for that one. Flown in on a D-21 and it did well

 

[kuririn]

I have a couple of bricks, the MPC Vostok and Titan II. Should be interesting, heads up flights.

 

[BABAR]

Here's hoping for mid-august... Looking forward to the D's especially. Have a vintage Venus Probe thats waiting for that one. Flown in on a D-21 and it did well

I modified Venus Probe and Exoskel rockets with 24 mm motor mounts just so that I could use D engines.

I really wonder what the engineers were thinking with some of the Estes designs that were designed for 18 mm. IMO waaay underpowered. A reasonably priced 18 mm D would be nice.

 

[Brian H.]

I had the pleasure of doing a demo launch for the guys from Aerotech at NARAM on Monday.
The D16 in a Der Red Max is very impressive!
I can see it easily lifting the heavier 18mm models. I have a Mercury Redstone that flew once on a C6-3 and then set on the shelf because it was not near enough motor.

 

[Initiator001]

These new Quest C12 and D16 motors have PROGRESSIVE burns. This means that the motors reach maximum thrust about halfway into the burn, not at ignition.
These motors would not be good choices for heavy or draggy models.

 

[Daddyisabar]

I flew the Estes Mercury Redstone on the D16 4 just after your DRM. Plenty of thrust for that model off the pad. The ejection charge will just be increased on the short delay motors, allowing you to fly the Estes piggies like the MR, Xarc Cruiser and Dark Silver. At the manufacturer's forum a guy had successfully clustered the B's.

 

[Brian H.]

Yes, they are progressive,but when the D16 starts with 2N higher thrust vs the C6 and then goes up from there, it will fly a heavy rocket designed for a C6 much better.

 

[jadebox]

Yes, they are progressive,but when the D16 starts with 2N higher thrust vs the C6 and then goes up from there, it will fly a heavy rocket designed for a C6 much better.

Here is a graphical comparison of the Estes C6 and the new D16:

https://www.rocketreviews.com/compare-motors---estes-c6-to-quest-d16-q-jet.html

-- Roger

 

[Brian H.]

Here is a graphical comparison of the Estes C6 and the new D16:

https://www.rocketreviews.com/compare-motors---estes-c6-to-quest-d16-q-jet.html

-- Roger

I tried doing the same comparison from thrustcurve.org and couldn't figure it out. It is interesting that rocketreviews shows higher peak thrust for the C6.

 

[neil_w]

Here is a graphical comparison of the Estes C6 and the new D16:

https://www.rocketreviews.com/compare-motors---estes-c6-to-quest-d16-q-jet.html

-- Roger

The interesting thing to me is how the Q-jets spool up so quickly compared to the BP motors. I would *think* that would translate to higher velocity off the rod, which would be very useful for heavier models.

On the other hand, I would like to see the same picture comparing a D16 to a C11.

 

[DankMemes]

Here is a graphical comparison of the Estes C6 and the new D16:

https://www.rocketreviews.com/compare-motors---estes-c6-to-quest-d16-q-jet.html

-- Roger

Interesting... I too have a Redstone sitting on the shelf I wish I built with a 24mm mount looks like initial thrust is close enough to the C6 that I’d be comfortable flying this in there, I’ll have to try the D16 in a few Burner rockets first to see how hot they run, had a D21 cook a motor mount in a big Bertha once not pretty but it flew like a bat out of hell

 

[lakeroadster]

On the other hand, I would like to see the same picture comparing a D16 to a C11.

Estes C11 to Quest D16 Q-Jet

https://www.rocketreviews.com/compa...tion=comparemotors&motorid1=598&motorid2=1377

 

[neil_w]

Man I had to hunt to figure out where you guys were getting the compare motors function on RocketReviews. Seems way too hidden for such a useful feature.

Anyway, that makes it seem like the D16 Q-jet would be a suitable substitute for a C11. The C12 Q-jet, on the other hand, doesn't have as much kick off the rod as a C11, so I'd need to be very careful with it. I'll have to get the C12 and D16 into OR and try them out with some of my sims. For my smaller and lighter 24mm rockets they might both be great; for the larger ones, maybe just the D16.

Running the Q-jets in a 24mm-18mm adapter has the further benefit of insulate the motor mount from the heat of the motors. Don't care if I scorch an adapter.

 

[jadebox]

I tried doing the same comparison from thrustcurve.org and couldn't figure it out. It is interesting that rocketreviews shows higher peak thrust for the C6.

RocketReviews.com lists 14.09 N as the max thrust of the C6 while ThrustCurve.org says 14.10. Pretty close.

The graph at RocketReviews.com doesn't round off the peak in the graph of the thrust curve, so the plots look different.

 

[DankMemes]

I modified Venus Probe and Exoskel rockets with 24 mm motor mounts just so that I could use D engines.

I really wonder what the engineers were thinking with some of the Estes designs that were designed for 18 mm. IMO waaay underpowered. A reasonably priced 18 mm D would be nice.

I have an exo-skell sitting in box, as after flying my venus probe it was obvious I wanted to put a bigger motor mount in the exo-skell... However it has one of those ABS Injection molded fin cans with integrated motor mount.

How did you go about getting a 24mm in there, did you ditch the stock fin can and build your own?

 

[Brian H.]

RocketReviews.com lists 14.09 N as the max thrust of the C6 while ThrustCurve.org says 14.10. Pretty close.

The graph at RocketReviews.com doesn't round off the peak in the graph of the thrust curve, so the plots look different.

I was just looking at the first graph posted by Domansky. There are 2 more by John Coker that are more accurate and match the published info from NAR testing.

 

[Daddyisabar]

I heard from a fly on the metal post of the NARAM pop up that the published thrust curves were conservative and the hope was these motors could be used in most Rockets using a D12! Having seen them fly my skepticism was tempered. Would I put it in my Mars Lander? Yes. My Rock-it? Yes My Titan III E? Maybe. My Noris Vostok? No.

 

[Steve Shannon]

I heard from a fly on the metal post of the NARAM pop up that the published thrust curves were conservative and the hope was these motors could be used in most Rockets using a D12! Having seen them fly my skepticism was tempered. Would I put it in my Mars Lander? Yes. My Rock-it? Yes My Titan III E? Maybe. My Noris Vostok? No.

How could published thrust curves be conservative?

 

[Daddyisabar]

Maybe they think they can get a bit more umph in the future?

 

[solid_fuel]

I like these comparison charts. How how do you do the chart? What about a chart comparing an Estes D12 compared to a Quest D16?
Thanks in advance.

 

[Steve Shannon]

Maybe they think they can get a bit more umph in the future?

If these motors are already certified, that should require a recertification if they do. The whole reason for certification is so flyers have reassurance that the motor will fly as tested.
If these are manufacturers demos then I could see them trying to tweak the motors before submitting for certification, but once they are certified they should not change.

 

[lakeroadster]

I like these comparison charts. How how do you do the chart? What about a chart comparing an Estes D12 compared to a Quest D16?
Thanks in advance.

The ROCKETREVIEWS site does the comparison.. you pick the motors, it creates the graph and chart.

Here's the Quest D16 Q-Jet to Estes D12: https://www.rocketreviews.com/compare-motors-464170.html

Look at the bottom left of the page, click on "What You Can Do".

 

[Daddyisabar]

These were manufacturer's demo flights. Had to fill out on the flight card and prep rocket at the table. They inserted the new shrink tape igniter. Still working out potential bugs on securing the igniter so I was careful at the pad attaching the leads. It held in just fine. They will tweak the ejection charge back up on the short delay motors.

 

[Steve Shannon]

These were manufacturer's demo flights. Had to fill out on the flight card and prep rocket at the table. They inserted the new shrink tape igniter. Still working out potential bugs on securing the igniter so I was careful at the pad attaching the leads. It held in just fine. They will tweak the ejection charge back up on the short delay motors.

Thanks! It all makes sense then.

 

[solid_fuel]

The ROCKETREVIEWS site does the comparison.. you pick the motors, it creates the graph and chart.

Here's the Quest D16 Q-Jet to Estes D12: https://www.rocketreviews.com/compare-motors-464170.html

Look at the bottom left of the page, click on "What You Can Do".

Dude, that’s so sweet!

 

[lakeroadster]

Dude, that’s so sweet!

It is indeed. Thanks got to Roger (Jadebox) for turning us on to this feature.

Here is a graphical comparison of the Estes C6 and the new D16:

https://www.rocketreviews.com/compare-motors---estes-c6-to-quest-d16-q-jet.html

-- Roger

 

[Daddyisabar]

Thanks! It all makes sense then.

This was the last demo flight. Bring forth the lambs for the ritual. No super light 3FNC Alpha with blue Quest waddling. This was the nightmare scenario. A sports scale Estes MR with no engine hook or block. Previously flown only on AT 18 mm reloads with a handful of nasty dog barf. Motor friction fit, stock nose weight in place, all that drag from the escape tower. The sacrificial beast was launched, and like Monty Python and the Holy Grail, the new science of determining the future from the contents of a sheep's liver was employed. Top men examining the rocket's contents on the table. All the little bits revealed much joy for the future.

 

[BABAR]

I have an exo-skell sitting in box, as after flying my venus probe it was obvious I wanted to put a bigger motor mount in the exo-skell... However it has one of those ABS Injection molded fin cans with integrated motor mount.

How did you go about getting a 24mm in there, did you ditch the stock fin can and build your own?

I built an add on section (sort of like a booster section, except instead of an upper stage engine the 24 mm engine in the bottom section just blows through the fin can to pop the chute.)
Build thread here
https://www.rocketryforum.com/threads/exo-skell-build-thread.36956/#post-354993