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  #1  
Old 03-20-2020, 11:41 AM
5x7's Avatar
5x7 5x7 is offline
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Default Breaking the Drought - E6 Monocopter

My basement partly flooded in November (water heater) which caused a lot of financial and physical upheaval, so I havenít been doing much Rocketry. With launches cancelled, I ordered an Aerotech RC case and E6 reloads from Dynasoar Rocketry, best price around. I have an Art Applewhite Monocopter which takes a 24mm motor I have flown many times. I finally got out this morning in the fog to the park to fly it. The E6 uses the RC case which is machined from an aluminum block and is closed at one end. The propellant is an end burning slug of Blue Thunder which has a slot just at the end to provide an ignition spike. The igniter I think is a Fire Fire Jr which is so large it wonít fit through the nozzle and has to be built in. In the fog the igniter sparks and flame were visible. The E6 is a full E and burns for over 7 seconds, and the flight was one of the best ever, better than a single use E6 it flew on many years ago. With other motors if the Monocopter goes high enough it will autorotate part way down, but I think the weight of the case prevented that. In Monocopters because they are spinning so fast, gasses inside the motor going straight toward the nozzle can be turned and impinge on the inside end of the casing. This has caused E9s and Quest E5s to non-catastrophically pinhole burn through near the end of the burn, while other motors donít. See the pictures, the liner did itís job and protected the casing but I canít recommend any one try this. I was careful to have the slot perpendicular to the rotation plane to provide some additional protection to the side of the case before that propellant burned away.

Flight Video

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  #2  
Old 03-20-2020, 12:45 PM
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ghrocketman ghrocketman is offline
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Cool flight.
I'd paint it fluorescent orange though.
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  #3  
Old 03-20-2020, 04:16 PM
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5x7 5x7 is offline
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Agree, I have been meaning to paint it.
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  #4  
Old 03-21-2020, 12:12 AM
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Jerry Irvine Jerry Irvine is offline
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Quote:
Originally Posted by 5x7
My basement partly flooded in November (water heater) which caused a lot of financial and physical upheaval, so I havenít been doing much Rocketry. With launches cancelled, I ordered an Aerotech RC case and E6 reloads from Dynasoar Rocketry, best price around. I have an Art Applewhite Monocopter which takes a 24mm motor I have flown many times. I finally got out this morning in the fog to the park to fly it. The E6 uses the RC case which is machined from an aluminum block and is closed at one end. The propellant is an end burning slug of Blue Thunder which has a slot just at the end to provide an ignition spike. The igniter I think is a Fire Fire Jr which is so large it wonít fit through the nozzle and has to be built in. In the fog the igniter sparks and flame were visible. The E6 is a full E and burns for over 7 seconds, and the flight was one of the best ever, better than a single use E6 it flew on many years ago. With other motors if the Monocopter goes high enough it will autorotate part way down, but I think the weight of the case prevented that. In Monocopters because they are spinning so fast, gasses inside the motor going straight toward the nozzle can be turned and impinge on the inside end of the casing. This has caused E9s and Quest E5s to non-catastrophically pinhole burn through near the end of the burn, while other motors donít. See the pictures, the liner did itís job and protected the casing but I canít recommend any one try this. I was careful to have the slot perpendicular to the rotation plane to provide some additional protection to the side of the case before that propellant burned away.

Flight Video

.
Friggin awesome. Does the nozzle burn irregularly to one side due to centripital force of the motor metals? Love Monocopters.

Jerry
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  #5  
Old 03-21-2020, 12:03 PM
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LeeR LeeR is online now
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A couple years ago I went down to Pueblo in the Fall for an Oddrocs Launch. You could fly anything, but everyone was encouraged to bring an oddroc. What would I bring? I teally didn't have anything.

Remembering Bob Kaplowís posts about Halloween Treat Bowl oddrocs, I headed to the Dollar Store to load up on ďpartsĒ.

I built mine with 24mm motor tube. It was the perfect vehicle to use up E9s. ďOddlyĒ, Iíve never witnessed the thrill of an E9 cato in one of my rockets ... but I still have a few left, so there is hope. I also have some older composite E15s, and 29mm F25s, with paper caps over the ejection well. Those are definitely suspect, I have lost a rocket on one of these older E15s due to lack of ejection. Those F25s will require a 29mm oddroc. I wonder if a big Easter basket from the Dollar Store would be a good candidate?

I wish I had a video of the treat bowl flight. They spin like crazy and produce a great whirring sound in flight.
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