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Has anyone tried the screw switch kit from rail-buttons.com? https://rail-buttons.com/ocart3/index.php?route=product/product&product_id=59 They're good quality and easy enough to solder, but I've found you have to torque down the supplied screw really tight to get a low resistance; just a...

Marsa33LHD altimeter with LCD display, purchased December 2018, flown twice, perfect condition. $160 shipped USPS Priority Mail, Paypal only.

Does anyone have any flight experience with the SLCF above 50K feet? I'd like to use one as a backup altimeter on a flight that sims to about 70K feet. I know the SLCF is advertised to work to 100,000 feet and this is plausible because the MS5607 barometric sensor provides data to that...

I've got an R&R Aircraft Gamma Star R/C rocket glider that I've flown many times on Estes D12 and E12 motors. I've always launched straight up. The long burn times of the Aerotech E6 are tempting, but I'm wondering if the peak thrust is sufficient. The NAR R/C RG safety code only says "My...

I have a friend who got an old GPSFlight STXe GPS tracking system for free from another club member. It didn't come with any of the software and he's not having much luck making contact with GPSFlight (this unit is obsolete and unsupported.) We're not having much luck decoding the raw stream...

Anybody know how large the offset core is in the new DMS H45? I'd like to use one in an upper stage and am mulling over igniter options; can't use the supplied Firstfire because of current demands.

Our waiver request for 2014 was denied even though we'd been at the same site for 10 years with no problems. Our site is under a Victor airway (at the edge, about 3 NM from the center line) and that was one of the reasons cited for the denial. I was curious what the general policy was on this...

I'm currently building a two-stage rocket with a two-motor 29mm cluster in the second stage. I'm planning to use a pair of Pro29 3G H motors (either H90 Classics or H54 White Longburns most likely). In my experience with Pro38 and Pro54, most CTI motors light almost instantaneously due to...

As promised here's the build thread for a 2.6"-diameter RCRG based on a downscale of the Autonomy-1 rocket glider designed by Boris Katan and Dave Lindbergh, discussed in this thread: https://www.rocketryforum.com/showthread.php?t=23130 This started out as a straight downscale but I have...

TRA San Diego and DART (NAR Section 317) are pleased to announce that registration has opened for our 10th annual Plaster Blaster (PB10) launch, to be held November 4-6, 2011 in Plaster City, California, a small community 90 miles east of San Diego. Complete information and registration forms...