New AMRS H Impulse Single Motor Altitude Record

The Australian Model Rocket Society Inc. (AMRS) is Australia's premiere representative body for rocketry which advocates for its various member groups and exists to serve the broader rocketry community.

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drew
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New AMRS H Impulse Single Motor Altitude Record

Postby drew » Wed May 29, 2019 7:05 pm

Today the AMRS Records Committee would like to formally recognise Steve Dulek for claiming the AMRS H Impulse Single Motor Altitude Record! Steve flew his "Weasel" rocket successfully to claim the H Motor Record at the Thunda 2019.

The new H impulse single motor altitude record flight of 2,686m / 8,811' AGL was set at Westmar, Qld on the 18th of April 2019. Altitude was confirmed by an onboard Raven 3 altimeter. Steve's "Weasel" rocket was flown on a CTI H160 and reached speeds exceeding Mach 1.5.

Steve came to Thunda 2019 from the Netherlands to attempt many MD flights. A huge congratulations goes out to you on your achievement Steve!

Image

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Andrew Hamilton
AMRS 28 L3
AMRS Records Committee Chairman
Max Alt AGL - 26,850ft - L935 - THUNDA 2019
Max V - 3,004 ft/s, ~Mach 2.67 - L935 - THUNDA 2019

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SpaceManMat
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby SpaceManMat » Wed May 29, 2019 7:13 pm

Well done Steve. 8)

Great to get some more AMRS records happening.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

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Re: New AMRS H Impulse Single Motor Altitude Record

Postby air.command » Wed May 29, 2019 10:27 pm

Congratulations Steve! That's a great effort. :D
Crop Circles: ... just a bunch of guys looking for their rockets ....

Aquaman33
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby Aquaman33 » Wed May 29, 2019 10:35 pm

Congratulations. Great achievement.

Does anyone have any more details on the rocket?

Looks tiny.

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str8up
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby str8up » Thu May 30, 2019 7:55 am

Congratulations Steve. Was a pleasure to meet you at Thunda.

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CATO
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby CATO » Thu May 30, 2019 8:14 am

Congratulations Steve!
"In thrust we trust"

AMRS 21 L3 RSO
TRA 07459 L3

Impulse:
2019: 14,725 Ns (44% N)
Ns 18: 14,767; Ns 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
PB - Gorilla N2717WC, H: 10,260', S: M1.14

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stdulek
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby stdulek » Thu Jun 06, 2019 2:36 am

Weasel.PNG

Thanks everyone.
Its all fairly small and light, used just a mylar streamer for recovery. If it wasn't for the Featherweight GPS tracker, in the nose I would never have found it.
The nose cone was 3D printed von Karman profile, a phenolic airframe, the fins were 3D printed with a double van Karman symmetric airfoil
Steve Dulek
TRA 14218 L2

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SpaceManMat
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby SpaceManMat » Fri Jun 07, 2019 9:38 am

stdulek wrote:Weasel.PNG
Thanks everyone.
Its all fairly small and light, used just a mylar streamer for recovery. If it wasn't for the Featherweight GPS tracker, in the nose I would never have found it.
The nose cone was 3D printed von Karman profile, a phenolic airframe, the fins were 3D printed with a double van Karman symmetric airfoil


Oh nice, what material were the fins made out of?
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

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stdulek
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby stdulek » Fri Jul 05, 2019 12:48 am

Fins were made from Nylon, specifically Tauman 910, which is a bit stiffer and harder than many nylons. Also anchored it to a slot in the body tube using a 1mm tab of G10 extending from the core of the fin. Nylon is notoriously difficult to glue, as epoxy will sometimes flake off, though roughing the surface of the nylon and the G10 anchor helps.
Anyone wanting the 3D model of the fin (which is scalable for other rockets using slicer software, like Cura), it's got a symmetric Von Karman profile. Should scale up well to something fitting a 54mm airframe. I've flown 3D printed fins on 54mm airframes using co-polyester filament, and a G10 core.
Steve Dulek
TRA 14218 L2

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SpaceManMat
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Re: New AMRS H Impulse Single Motor Altitude Record

Postby SpaceManMat » Mon Jul 08, 2019 9:21 am

I’m a little obsessed about fin airfoils so would love to see the 3D model
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing


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