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Rocket86

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Any ideas on what may have caused my motor case to buldge on the forward end? Loaded with a J350W, same as I always do. I carefully removed all the pieces to ensure I didn't miss something, but I can't see that I loaded anything wrong. Any feedback would be appreciated
I recently had the same things happen with an H180W. The motor performance seemed normal and it was a good flight but there was a distinct bulge just below the forward closure. The black FSD, used many times and still black, was also kind of a copper color. It was one of the plastic bagged reloads, not a new one, and it was not an Aerotech case. I'd love to know what the cause was.
 

AeroTech

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I recently had the same things happen with an H180W. The motor performance seemed normal and it was a good flight but there was a distinct bulge just below the forward closure. The black FSD, used many times and still black, was also kind of a copper color. It was one of the plastic bagged reloads, not a new one, and it was not an Aerotech case. I'd love to know what the cause was.
The H180W doesn’t use a forward seal disc.
 

John Taylor

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F52C Classic Enerjets now in stock and on the shelves!
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I've only used one Classic propellant motor, a K400. Worked fine. I did notice very little smoke. Other than that are there any advantages/disadvantages to using the Classic propellant?
Blue Thunder propellant for example is easier to light and is good for clustering compared to White Lightning.
Normally I prefer White Lightning propellent with all but cluster applications.
How does the Classic propellent compare to the other propellants?
Thank you.
 

AeroTech

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I've only used one Classic propellant motor, a K400. Worked fine. I did notice very little smoke. Other than that are there any advantages/disadvantages to using the Classic propellant?
Blue Thunder propellant for example is easier to light and is good for clustering compared to White Lightning.
Normally I prefer White Lightning propellent with all but cluster applications.
How does the Classic propellent compare to the other propellants?
Thank you.
Ignitability is midway between WL and BT
Higher Isp than both
Density slightly higher than BT, but lower than WL
Similar insensitivity to moisture as BT
 

Rocket86

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Whose case was it?
It's a Dr. Rocket. I got it used and used it a lot, as the 29/240 reloads are a great line. I flew a lot of 180's and 210's for many years. I'm just curious about what might have caused it. There was a lot of heat on that one. I had a red plastic cap over the end of the forward closure as part of plugging it and it was melted and almost black, and fused into the knurling and had to be cut off. They have always been completely intact after a flight.
 

Tractionengines

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So...quick question (long post, sorry) of people have flown the production versions of the new 24mm Q-Jets...Any fit issues? I have minor issue with some that fit fine for the most part. Then get very tight for the last 1/8-1/4". So I tested a bunch of retainers, and motor tubes, from the build box; with a bunch of Q-Jets, and couple of Aerotech 24mm motors. Photos show where motors stopped when slid into mounts. Same part used for both motor photo's, so not differences in parts, only motors.
No issues with Estes 29->24 adapter. (Not sure how long it will hold up to heat from the recessed nozzle. But they are inexpensive). Also no issue with Estes 24mm screw on retainers.
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Most issue was with Mach1 24mm fiberglass MMT (50% didn't seat at all), Aeropack retainer and Aeropack 29->24 adapter. (I have 3 Aeropack adapters, and almost all the Q-Jets would get tight right at the end. To the point a few would not seat at all )
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I will look into sanding the ID of the parts, or peeling part of the motor labels. But wanted to see what others have run into.
 

AeroTech

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So...quick question (long post, sorry) of people have flown the production versions of the new 24mm Q-Jets...Any fit issues? I have minor issue with some that fit fine for the most part. Then get very tight for the last 1/8-1/4". So I tested a bunch of retainers, and motor tubes, from the build box; with a bunch of Q-Jets, and couple of Aerotech 24mm motors. Photos show where motors stopped when slid into mounts. Same part used for both motor photo's, so not differences in parts, only motors.
No issues with Estes 29->24 adapter. (Not sure how long it will hold up to heat from the recessed nozzle. But they are inexpensive). Also no issue with Estes 24mm screw on retainers.
View attachment 469556
View attachment 469554View attachment 469555
Most issue was with Mach1 24mm fiberglass MMT (50% didn't seat at all), Aeropack retainer and Aeropack 29->24 adapter. (I have 3 Aeropack adapters, and almost all the Q-Jets would get tight right at the end. To the point a few would not seat at all )
View attachment 469561View attachment 469562View attachment 469563
I will look into sanding the ID of the parts, or peeling part of the motor labels. But wanted to see what others have run into.
The motors were designed to fit Estes and Quest motor mount tubes. The cases are slightly larger diameter at the nozzle end (by only a few thousandths of an inch) due to the pressed nozzle. There shouldn’t be enough heat to damage the Estes adapter, the clay nozzle doesn’t conduct heat very well and the burn times are relatively short. Hopefully if part of the paper label is peeled off it will completely fit into that Mach 1 fiberglass tube and the Aeropack retainer.
 

Tractionengines

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The motors were designed to fit Estes and Quest motor mount tubes. The cases are slightly larger diameter at the nozzle end (by only a few thousandths of an inch) due to the pressed nozzle.
That is what I was guessing, but didn't see it anywhere. Thought this "heads-up" could help someone from getting a surprise at the flying field for other motor mounts...
Great motors...love the new options.
 

J Blatz

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Props to AT on the new F52C. Feelz. Love the look and profile.

I’m old school as can be, and there is a special place in my heart for AeroTech, NCR, and LOC Precision.

Rock on brothers.
 
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