Read about them here:What's a "Q-Jet?"
I seriously doubt that NAR S&T is the bottleneck here, despite what you might have read elsewhere. S&T works quickly and efficiently.Too bad Aerotech is having such a hard time getting NAR to approve new loads. This might make interested in some 18mm kits again
I've been hoping that somebody from S&T would post about this issue, but that hasn't happened yet. FWIW, the NAR BOD minutes from February say this:I seriously doubt that NAR S&T is the bottleneck here, despite what you might have read elsewhere.
See http://www.nar.org/orgdocs/board-of-trustee-meeting-minutes/The Board discussed the fact that S&T relies heavily on [committee chair's] relationship with
MIT, whose facilities we use for testing. [] suggested that S&T should build an alternative testing
system as insurance against the possibility of losing access to the MIT test cell... [motion approved] $5000 for a trailer, a mobile test stand, and new test equipment as needed.
We have 18-24mm trackers nowFolks, little rockets that go up high end up getting lost easier than larger rockets that go up high. At least the motors are SU. Kurt
From the link in post #3...Supplier of the casing? Am I missing some context here
If they have some really interesting/unique burn characteristics (for 18mm anyway...) then I think they'll find their place.I bet Estes will have no response. I am looking forward to flying a few but unless the price point is close to Estes, I don't think they will get a large market share. Time will tell.
I would like to see your proof.I seriously doubt that NAR S&T is the bottleneck here, despite what you might have read elsewhere. S&T works quickly and efficiently.
James
Does that mean the cases are no longer an issue? (if they ever were?)I would like to see your proof.
Estes has had a plan (you probably know this) for lower impulse pressed composite motors (using Vulcanite EB-75 propellant) for many years. Thus far they have never implemented it. They must think it's not a good route for their business. The Klima motors are apparently doing well in Europe. I was really hoping they'd export to U.S., and I suppose Aerotech/Quest examined that route but thought it best to make their motors here.I bet Estes will have no response. I am looking forward to flying a few but unless the price point is close to Estes, I don't think they will get a large market share. Time will tell.
The case has been finalized, I will try and post a pic for you all.Does that mean the cases are no longer an issue? (if they ever were?)
Yay, want some motors.The case has been finalized, I will try and post a pic for you all.
Slightly less mass, more options for thrust profile, much less sensitive to temperature cycles.I saw this ad, too, and thought is what is the advantage of a composite motor A or B motor that is 18 mm just like a black powder motor?
I'm looking at a D total impulse comparison because that's the only one I might be interested in. The D16 difference from an Estes D12: much faster thrust buildup, higher average thrust (16N vs 12N), lower mass (~25g vs 39.2-44.9g), cheaper at full retail prices (without doing a total impulse vs price comparison). Downside: considerably less total impulse (11.8Ns vs 16.84Ns), possibly more difficult to ignite, no booster (0s delay) version.I saw this ad, too, and thought is what is the advantage of a composite motor A or B motor that is 18 mm just like a black powder motor?
The q-jet motors have more total mass not less.Slightly less mass, more options for thrust profile, much less sensitive to temperature cycles.
On the down side BP motors smell better.
Interesting. That must be casing because the mass of propellant should be much less for the same total impulse.The q-jet motors have more total mass not less.