TNT Logo Polo Shirts – place your order!
| May 30, 2016 | 1:16 pm | TNT | Comments closed

All,

We are going to do a run of TNT Logo Polo shirts. Unless we have a group order of more than 36 shirts the cost per shirt will be $30.99 + tax. (The club is not marking these up – this is actual cost.) Attached is a flyer that has all the details.

If interested please send your name, color choice(s), and size(s) to the email address listed on the attached PDF. Orders will need to be prepaid and there will be a wide variety of pickup options available. Final details will be available once we know how many shirts we need to order.

Please place your order by June 12th, 2016.

Thank you,

Tony Huet, Prefect

TNT-Shirt-Flyer

 

 

Thanks to all who helped Estes at the Family AdventureFest!
| August 26, 2015 | 10:06 pm | Special Projects, TNT | Comments closed

Don Magness of Squirrel Works Model Rocketry asked Tripoli North Texas to help recruit volunteers for the Estes Make-it-Take-it rocket build event at the recent Coleman Family AdventureFest in Irving. Don had been contacted by Mike Fisher at Estes to help find volunteers so Don asked me to contact TNT membership and ask for help. Sam Barone also helped recruit volunteers as well. On Saturday alone attendees built nearly 400 rockets which was more than expected, causing a quick trip back to the hotel for more rockets. Overall, nearly 800 rockets were built in just 3 days! Mike thought the event was a huge sucess.

Thanks again to all who volunteered: Sam Barone, Tony Huet, Ted Macklin, Don Magness, Buzz McDermott, Harry Spears, Jason Unwin, and Kirk Wood.

– Tony Huet

Rail guide placement and binding
| January 20, 2014 | 10:45 pm | TNT | Comments closed

In response to post 13426 by Dave Schultz on DARS-General, I thought I’d see if moving the rail buttons as he suggested would have any affect on how smoothly a rocket might move on a rail. I devised a simple experiment that anyone should be able to try on their own. I’m sure someone can compute the math, but I’m more of an empirical kind of guy.

I made a simple rocket using a 4 foot long PVC pipe and attached rail buttons as usual and added a 340 gram weight (a c-clamp that was handy) to the aft end. I  slid the rocket on a rail held horizontally with the buttons at a 90 degree angle to the ground to side load the buttons as in a cross wind. I tilted the rail towards vertical and measured the angle at which the rocket started to slide freely down the rail. On average, it would start sliding at 35 degrees from vertical. I repeated this experiment about 10 times and got consistent results. (I used a new rail free from exhaust residue.)

I then did the same experiment with the rail buttons in the location Dave Schultz suggested in the post referenced above. I had to tilt the rod much higher – to only 20 degrees from vertical before the rocket started to slide freely. I also repeated this experiment about 10 times.

To me this shows that the new button arrangement is more likely to bind as the rocket moves along the rail. Without compelling evidence that moving the buttons mitigates some other safety concern, it seems like a better idea to leave the buttons in their typical locations.

BALLS 2013
| November 27, 2013 | 6:29 pm | TNT | Comments closed

Here are a few photos from the Tripoli North Texas trip to BALLS 2013. A more complete post to come later.

L3 Rocket at the pad

L3 Rocket at the pad

Robert's L3 flight.

Robert’s L3 flight.

Boost of Ken's 2-stage rocket

Boost of Ken’s 2-stage rocket

Arming the electronics.

Arming the electronics.

How to get a 2 stage out to the pad.

How to get a 2 stage out to the pad.

Dave Schaefer's X-2 safely out of the wind.

Dave Schaefer’s X-2 safely out of the wind.

Michael, Tony, Ken, Dave, and Robert

Michael, Tony, Ken, Dave, and Robert