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The MDRA Board has decided to cancel the launch for Sunday 8/16 due to significant weather that is expected to move in early Sunday morning. Stay tuned to the MDRA website for September launch dates. MDRA Board.

MDRA’s Website has partially returned. Please visit https://mdrocketry.org/whats-happening/ for the latest communications. MDRA will use this webpage for communications until the membership database is converted. We have optimistically scheduled an August Launch with new restrictions. Please...

It is with deep regret that we must announce the cancellation of Red Glare 21 that was scheduled for April 3-5, 2020. This probably should not come as a surprise. We were hoping for the best. However, Maryland has imposed restrictions limiting gatherings of no more than 10 people, closing all...

MDRA has cancelled this weekend’s ESL 259 launch scheduled for March 14-15, 2020 with an abundance of caution concerning the spread of Coronavirus (COVID-19) and in accordance with sweeping directives issued today from Maryland’s Governor Larry Hogan that included that all large gatherings be...

The all thread is more to spread the recovery load over more that one CR.

Peter did a great job on both video and the slideshow, thank Peter

I recently backed their Orange 30 printer on KS. It has a slightly larger build volume than the Orange 10 and because it was a KS its coming with some spare parts and other goodies...

PM inbound.

I’m interested in the pike, sent a pm earlier today

Did you acquire the rights to the "Quasar One Rockets" brand and the individual rocket designs and are they being conveyed in this sale?

I did the RSO check on that rocket, I believe it had a 3gr 54mm motor in it

Please refer to the MDRA website (mdrocketry.org), Facebook page or twitter feed for official details related to Red Glare 20.

I use Rhino for my 3d printing and VCarve Pro cnc router (VCarve reads Rhino 3dm files). I also wrote a Rhino plugin that reads an OpenRocket file and generates the Rhino 3d parts for me.

I ran a systematic series of tube fin rockets in OF several years ago, I used Pointwise ($$$) to generate the grids instead of the OF grid tools. Those input files are way out of sync with the current OF distribution. I had intended to boil the data down for use in OpenRocket but real life got...

In OpenFoam, you use a function object to calculate the lift, drag, and moment, the function object will integrate the pressures for you on the specified wall boundary.

You can use either code, you need to compute the forces and moments for a couple AoA. Resolve the forces into the body coordinate system then divide the moment by the normal force. The resulting distance will be the distance alone the body center line from the point you calculated the moment...

so why not do (35*10)+(35*2)=420, I made all 4 of my children's math and science teachers nuts while they were in school. I had two caught in "New" math and two in "Common Core" math.

I live 10 minutes from the field, I will be there both days unless the board makes an announcement on mdrocketry.org.

I will be there look for the black utility trailer

The FolgerTech Fortis machine has a 20% off discount code, BG1820FORTIS good 11/22 to 11/26. The kit has lead screws and a spindle for $799 before the discount. I have been running mine 5-6 hours a day for the last month. If any one goes this route you will want to replace all the stepper wire...