Another new motor certified

[Alan Whitmore]

TMT has also tested and certified the Aerotech K76WN-P single use 54mm diameter motor. This motor has the familiar 2-propellant configuration of White Lightning and Warp 9 to produce a thrust spike of about 300 N at ignition, followed by a LONG tail of about 20 N (or 6.8 lbf). Burn times are around 20 seconds. Details will appear on www.thrustcurve.com very soon.

Alan Whitmore
Chair, TMT

 

[Rocket501]

Nice! I've been looking forward to this one for a long time now.

 

[JohnCoker]

Wow, that's a fantastic motor for special purposes!
https://www.thrustcurve.org/motors/AeroTech/K76WN-P/

 

[Walter Longburn]

Motors like those must burn at extremely low pressure during the sustain.

 

[Charles_McG]

Tag @djs

 

[Joshua F Thomas]

20 seconds, holy moly

 

[MClark]

I was hoping for less spike, higher thrust sustai.

 

[prfesser]

I was hoping for less spike, higher thrust sustai.

Would require a smaller nozzle throat, which would undoubtedly CATO with an ordinary-size Warp-9 grain. Make the Warp-9 grain half the length and it might work. Even so, this K76 has an excellent thrust profile for an upper stage sustainer.

 

[GrouchoDuke]

It's cool/funny to see it off the charts at thrustcurve. Looks like a really fun motor!

 

[3stoogesrocketry]

Would require a smaller nozzle throat, which would undoubtedly CATO with an ordinary-size Warp-9 grain. Make the Warp-9 grain half the length and it might work. Even so, this K76 has an excellent thrust profile for an upper stage sustainer.

The Warp 9 is the end burning grain if im not mistaken. I do not think the Kn of WL end burner with a Warp 9 boost grain would support continued ignition.

 

[rharshberger]

That would be fun in my 3" Frenzy clone.

 

[prfesser]

The Warp 9 is the end burning grain if im not mistaken. I do not think the Kn of WL end burner with a Warp 9 boost grain would support continued ignition.

You're absolutely right. If I'd'a thought a bit more I'd'a figured it out.

 

[Cameron Anderson]

Case length?

 

[Titan II]

Case length?

Post 3 help?

 

[Neutronium95]

I just ran a simulation of this in my 3" tubefin. It's hilarious. It gets off the pad fine, thanks to the boost grain, but it actually starts to slow down once that burns out. I am definitely going to fly one once I get my L2 certification.

 

[GrouchoDuke]

Over 18k & Mach 1 in OpenRocket out of a quickie sport MD design...

 

[AeroTech]

View attachment IMG_3126_480.mov

 

[AeroTech]

I can speak from experience that flights over 20,000 feet are easily possible.

Over 18k & Mach 1 in OpenRocket out of a quickie sport MD design...
View attachment 434197

 

[AeroTech]

A tubefin rocket would be ideal for this motor. I've found that tubefin rockets fly unusually straight with long burn motors.

I just ran a simulation of this in my 3" tubefin. It's hilarious. It gets off the pad fine, thanks to the boost grain, but it actually starts to slow down once that burns out. I am definitely going to fly one once I get my L2 certification.

 

[GrouchoDuke]

I can speak from experience that flights over 20,000 feet are easily possible.

Yeah, I bet so. If I move that sim to Black Rock, I get over 19. If I shortened it or made it more smooth or went to 3 fins, 20 should be right there. Sure looks like fun!

 

[ksaves2]

Over 18k & Mach 1 in OpenRocket out of a quickie sport MD design...
View attachment 434197

Better make sure a “good” tracking system is onboard! Kurt

 

[AeroTech]

This was at Airfest in Kansas:

Yeah, I bet so. If I move that sim to Black Rock, I get over 19. If I shortened it or made it more smooth or went to 3 fins, 20 should be right there. Sure looks like fun!

 

[AeroTech]

The Telemetrum worked for me. Found it about 2-1/2 miles away.

Better make sure a “good” tracking system is onboard! Kurt

 

[JohnCoker]

It's cool/funny to see it off the charts at thrustcurve. Looks like a really fun motor!

Yep, I noticed that too. Metadata reset every 24h, so now it just messes up the chart for the other motors.

 

[MClark]

The Telemetrum worked for me. Found it about 2-1/2 miles away.
View attachment 434218

A Tripoli board member launching a rocket!!

M

 

[Bruce]

TMT has also tested and certified the Aerotech K76WN-P single use 54mm diameter motor. This motor has the familiar 2-propellant configuration of White Lightning and Warp 9 to produce a thrust spike of about 300 N at ignition, followed by a LONG tail of about 20 N (or 6.8 lbf). Burn times are around 20 seconds. Details will appear on www.thrustcurve.com very soon.

Alan Whitmore
Chair, TMT

Is the Certified Rocket Motors List,

https://www.nar.org/SandT/pdf/CombinedMotorsByImpulse.pdf

available in any other form besides a PDF?

An Excel spreadsheet or CSV would be great if possible!

 

[Alan Whitmore]

Is the Certified Rocket Motors List,

https://www.nar.org/SandT/pdf/CombinedMotorsByImpulse.pdf

available in any other form besides a PDF?

An Excel spreadsheet or CSV would be great if possible!

Yes, the "Combined Motors by Impulse" file is updated every 6 months or so, so this will become slightly more out of date as time goes by. I am keeping my copy updated, until someone volunteers to curate the .xlsx
Alan

 

[Bruce]

Great!

Thank you very much Alan!

 

[GrouchoDuke]

Yep, I noticed that too. Metadata reset every 24h, so now it just messes up the chart for the other motors.

That's awesome!

Better make sure a “good” tracking system is onboard! Kurt

Yeah, that part's easy.

 

[AeroTech]

Recent test of a minor redesign that worked well.

View attachment trim.B27B2FA0-78E1-4B18-A0F8-9A46A4EA334B.MOV