10k(m) flight

[rAUM]

Hi guys,

After spending a couple years in the hobby I am ready for the next level (going for 10km). While tinkering a bit in openrocket I couldn't get the altitude above 10k with a N motor. Anybody that can help?

 

[thzero]

Hahaha

 

[bad_idea]

- Removed incorrect info. Oops.

 

[OverTheTop]

Definitely achievable. The Spaceport America Cup team I mentor did it with a N motor.

 

[charrington]

I would start by seriously shortening your airframe and then finding the optimal weight for maximum altitude. You are probably gonna go with a single bay deployment system with a tumble descent and line cutter chute release. Something like that ought to get you to 10k.

Also, you will be hauling a**. I recommend a stability of at least 2 when going supersonic.

 

[GrouchoDuke]

Add a few more inches to one of these and put an L1040 in it. https://wildmanrocketry.com/products/mach-2-rocket?_pos=1&_sid=8640f1750&_ss=r

 

[Neutronium95]

For starters, you're probably going to want to make it actually minimum diameter, that'll save a lot of drag and a decent amount of mass.

 

[cautery]

Add a few more inches to one of these and put an L1040 in it. https://wildmanrocketry.com/products/mach-2-rocket?_pos=1&_sid=8640f1750&_ss=r

Just received my carbon version of that one.... It's..... reeeal nice.
I very much like it. Thanks again, Tim!

 

[James Kobel]

You most definitely want to go minimum diameter here! I also agree with @charrington in going with a single bay deployment using some sort of cable cutter. This is almost the exact project that I am designing as well! Just gotta learn some good techniques with them cable cutters

 

[user 30299]

Definitely achievable. The Spaceport America Cup team I mentor did it with a N motor.

Did your team use a COTS motor, or was it an SRAD motor?

I couldn't find my team listings from this past year. I know some of the 30K teams go SRAD.
Ohio State is right up the road from me and I know they do SRAD in the 30K.

 

[OverTheTop]

Did your team use a COTS motor, or was it an SRAD motor?

I couldn't find my team listings from this past year. I know some of the 30K teams go SRAD.
Ohio State is right up the road from me and I know they do SRAD in the 30K.

COTS. We are not allowed to make our own motors here.

 

[cls]

My Mongoose 98 with Von Karmen nose cone got 37000+ feet, 11.5km, using CTI N1100. Same rocket with conical nose cone, 33000 feet

The AT N1000 is probably a better motor for altitude. a friend got 40000+ with that motor, and Mongoose 98 with VK nose cone.

This was all off the shelf commercial parts, nothing fancy.

 

[user 30299]

COTS. We are not allowed to make our own motors here.

Not allowed to make motors. Learn something new everyday.

 

[jbsommerfeldt]

 

[OverTheTop]

Not allowed to make motors. Learn something new everyday.

Remember that is for Australia. Regulations are a bit tighter here.

Another comment I will make on the flight to 30k' by the IREC team I mentor: don't forget they carry a 4kg payload to that altitude. If not carrying a payload you can easily exceed 10km on an N.