Ye gads, nothing but net!!!! Way kwel.....

Outstanding!!! Very nice job, great pics on the tip-2-tip thing. I'd put one of them new Cesaroni N10000 (that is ten thousand, not one thousand 😯 ) in there!

What sort of altitude are you looking at for MHM, Sean?

Well I won't know for sure until I get the final weight, probably in the low 20s with a 3 grain. Rocksim always seems to underestimates these flights by 20% or so as you know. With a full 6GRXL long-burn I'm betting low to mid 40s...

BALLS is going to be epic this year. I can't wait... I am assuming that is the time and place you are going to do the long-burn 98mm?

I need to go back to the drawing board and come up with something that will stay ahead of you 8)

With a full 6GRXL long-burn I'm betting low to mid 40s...

Great looking rocket! Are you sure about these numbers? Is this a stock Mongoose? I was told it sim'ed to around 60kft with the N5800 6GXL load.
Jeroen

Dr J,
The numbers were just an estimate from a generic earlier sim. I haven't done the final weights or imported the new thrust curves for Rocksim yet. And for what its worth Rocksim seems to underestimate these minimum diameter flights. I would be blown away with 60k though. Once I get a final weight and can run the numbers better Ill post those. -Sean

From my experience, Rocksim tends to be all over the place with high performance flights. I've seen overestimates and underestimates, often by significant margins. It would definitely be awesome on the N5800 though.

Beautiful work by the way. I say put in an N10,000 Vmax 😈

Nice work on the fin can so far!

Look, any simulation tool stops being plug-n-play when you start trying to simulate advanced airframes. If you're building high-flying minimum diameter airframes and you really want to know what they're going to do, it'll take more than just firing up Rocksim and putting in the parts...

If you really want to know what a minimum diameter airframe is likely to do, learn about some of the other available tools like rasaero and what they do. Rocksim makes various simplifying assumptions to keep the calculation load down, including using a really simplistic model of nose cone drag. So you need to read the docs and understand its limitations before you place too much faith in what it's telling you on extreme projects. One common approach is to use tools like rasaero to figure out drag estimates, then plug those into Rocksim. I find that tedious, personally, but it does produce more believable results.

I'm personally getting kind of excited about OpenRocket, which is an open source design and simulation program in Java that started as a masters thesis project in Finland. I've been playing with it for several months, and version 1.0.0 just released last week is getting close to useful. See http://openrocket.sourceforge.net for more details. Early results seem more believable to me, but I'll know more after MHM about how good I think it is at predicting actual performance above mach.

Whatever you do, have fun!

Sean, Here's some flight info on Mongoose 98..

http://www.youtube.com/watch?v=tkeq3PBMztw&feature=PlayList&p=183102C319314DC8&index=0&playnext=1

http://www.thrustcurve.org/motorguide.jsp?rocket=409

Tony