- Jan 21, 2009
- Reaction score
That was almost like the N10 000 vmax speed liftoffs! Beautiful!
Any thoughts on an M1378 flight?
Probably not an M1378 at this time. This this rocket will enjoy an early retirement, hung on the wall of my rocket room. Next on the list is a similarly constructed rocket, but 4" and a longburn motor for Balls.Also I second the question about the M1378 flight.
It jives with the altimeter data. The Featherweight Tracker gave good data during the flight and was broadcast over the launch PA system. It took us right to the rocket after landing. Great system, as easy as it gets. I have yet to make a fancy KML file. I'll get to that.How’s the GPS altitude data look?
Wearing outrageous hats gets you places in our club.I mean the flight was cool and all but what I really want to know about is that hat you are wearing. Please tell me more!
If I were to do this again it would be much simpler. I stated at the beginning of this thread that there were things done in this build that were over the top, overly complicated, and overly flashy. Some of that was done to test build methods (fin tip to tip), others just for some cool factor (Kevlar nose cone).If you were to rebuild a similar rocket, is there anything you would change or make differently?
Upper level winds. They were high. There was a shear layer up there where you can see the rocket make a left turn as it passes that altitude. In hindsight I maybe could have waited for better upper level winds.What accounts for the large difference between accel altitude and baro altitude? Which do you believe to be correct?
Yep, I feel the same way. I've always wondered if there was a net benefit for altitude shots with a flying case/fincan design given the added drag of the larger diameter fincan combined with the drag effects of the quite brutal 'step' the fincan has when compared to a VK NC that is flush to the rest of the airframe.Also, after thinking about it, I’m never doing a short fincan and motor diameter nosecone again. After seeing what the shockwaves did at every minor imperfection, I don’t think it makes sense aerodynamically. And it drastically increases structural complexity. Fincans are sooooo 2019.
I think you did too. I have parts on the work bench and a simulation, but work and life have conspired to delay combining those. I hope to start the build very soon with a target of late summer test flights and a record attempt at Argonia later. The field elevation won't help me there, but at least I can calibrate my sim and tweak before going to Black Rock or some other venue for a real attempt.I feel I left enough altitude on the table to encourage challengers. Bring it! I’d love to see someone beat it.
Maybe someone this weekend
Congrats on the successful project and record! I'm really interested in your approach for simplifying the fins. Will this be showcased in your 4" version?So for one, I’d do simple plate fins and a healthy fillet from high-temp Hysol epoxy or similar, with no tip to tip. Also, after thinking about it, I’m never doing a short fincan and motor diameter nosecone again. After seeing what the shockwaves did at every minor imperfection, I don’t think it makes sense aerodynamically. And it drastically increases structural complexity. Fincans are sooooo 2019.