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by SpaceManMat
Fri Aug 24, 2018 5:36 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

My guess is that ublox are themselves limiting it to 50km, for reasons unknown. It would sure be nice if someone from ublox would answer one of the many questions regarding max altitude on their forum. I think the there would be a mine field of historical legislation world wide, why change it if it...
by SpaceManMat
Thu Aug 23, 2018 7:40 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

TBH though I was more blown away by the fact that Tripoli no longer adheres to certification attempt rules for records. F me, I would NOT want to have to make a judgement call on a cert claim. IMO it's much better to have clearly defined frameworks to apply to these sorts of things. Yeah find that ...
by SpaceManMat
Thu Aug 23, 2018 5:08 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

drew wrote:And if we're being honest here John Derimig started sniping before I posted about the GPS and lack of lock so I do think he had an axe to grind before I posted.


Lol - it’s TRF - why pass up the opportunity for a bung fight?
by SpaceManMat
Thu Aug 23, 2018 5:02 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

...Seems to me we have a growing need to get altitude measurements above 50k. I did see an article about Copenhagen Oribital that they were using unlocked GPS. This could still be done with locked GPS. Using timing GPS modules to synchronize a radio transmitter on board the rocket to receivers on t...
by SpaceManMat
Thu Aug 23, 2018 12:53 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 90
Views: 27317

Re: Joe Turner's 38mm Scratch-Build

There was no way I could have left any extra room. I used MD extension bars to allow me fit smaller motors. Adjusting them correctly is a bit of a pain. Not sure how you are addressing the adjustment.
by SpaceManMat
Thu Aug 23, 2018 12:43 pm
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

This seams to be causing some controversy on TRF as well. Also apparently the Go Fast flight altitude was determined by post flight modeling, something I was not aware of. Seems to me we have a growing need to get altitude measurements above 50k. I did see an article about Copenhagen Oribital that t...
by SpaceManMat
Tue Aug 21, 2018 8:34 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 69
Views: 6339

Re: RE: Re: Don't Debate This, Too

I’m not sure I’d feel safe behind that board for a 900psi test. At those pressures it depends a lot on if all air has been bled from the system. I've seen a ~5kg fitting shot across a workshop by under 2000psi that would have likely killed anyone in its path due to trapped air not correctly being b...
by SpaceManMat
Tue Aug 21, 2018 8:31 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 90
Views: 27317

Re: Joe Turner's 38mm Scratch-Build

joeman wrote:Oh,
Does anyone have a SPENT Pro38 6G motor liner, end cap,rear closure etc they want to sell me? :D
(already got the motor casing)

I want to do a trial fit...see how things look BEFORE I glue.

Cheers

Joe


Unfortunately I can’t seam to bring myself to fly a 6G when I have a 6G XL case.
by SpaceManMat
Tue Aug 21, 2018 8:24 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 90
Views: 27317

Re: Joe Turner's 38mm Scratch-Build

I just used a single bulk plate with a hole on the purple parrot. An eye bolt goes through the hole and screws into the motor adaptor. Bulk plate is epoxied to the body tube and I made a special tool from a $1 socket to remove / tighten the eyebolt. MD retainers are overkill IMO (at least for 38mm)....
by SpaceManMat
Mon Aug 20, 2018 5:35 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 69
Views: 6339

Re: Don't Debate This, Too

I’m not sure I’d feel safe behind that board for a 900psi test.
by SpaceManMat
Mon Aug 20, 2018 5:21 pm
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 91
Views: 16857

Re: Nike Apache Half-Scale Project

Very clean, I need to try this out sometime
by SpaceManMat
Mon Aug 20, 2018 8:19 am
Forum: Queensland Rocketry Society
Topic: 19th August 2018 Launch
Replies: 11
Views: 1494

Re: 19th August 2018 Launch

Well guess who didn’t check the forums for launch updates :roll:
by SpaceManMat
Mon Aug 20, 2018 8:15 am
Forum: News & Events
Topic: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack
Replies: 31
Views: 8069

Re: Curt von Delius hits 200k' with his Phoenix 4 2 stage stack

Finally, and this is a bit of a more generic question, but what viable options are available for calculating apogee above 50,000m that exclude accelerometer data that's quite prone to drift and doesn't normally take into account the lack of a truly vertical flight? If done well accelerometers can p...

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