emFire

emFire
Diameter:6.01"Type:Sport
Length:107"Status:Active / 2 flights
Motor Mount:98mmBuild Dates:2008-12-01 to 2009-07-11

emFire is a 6" vehicle with a 98mm x 42" motor mount. It was designed to be a test vehicle to fly motors from the 75-3500 up to the 98-12500, with same end dual deployment. The upper airframe section is borrowed from This End Up, with a new booster consisting of three vacuum-bagged composite fins, a glassed 6" airframe section, and a 98mm motor mount with three centering rings. There is plenty of room in the midships avionics bay to place a camera, as well. It's a really neat rocket that's light enough to pop up on a big K, and strong enough to fly on a small N. emFire is named for Sasha's record label based out of the UK.

Flights

Event: FAR November 2015

Date: November 7th, 2015

Motor: TDK M2400

This motor was originally intended for my IQSY Tomahawk in Indiana, but after I cracked the fins on its last flight I never got around to flying it. When Ryan was in town, we dug around in the magazine and found it all bonded and ready to go. Ryan prepped the rest of the motor while I did avionics and deployment charges and packed the chute. The morning of, we picked up Cancel on the way to the MTA and arrived in style around 11:00 (fashionably late). Final prep was fast, and we had it on the pad in no time. Ryan did the honors, and things were off and away on a nice blue flame that elicited comments from the sugar-happy FAR attendees. (That case seals, even with paint on the inside of it, oops.) Deployment was of the single variety, and after the chute appeared, we spent several relaxing minutes lying on the ground staring skyward at the neon green jellyfish slowly lowering the bird to the ground.

Event: Perchlorathon July 2009

Date: July 12th, 2009

Motor: Kosdon L1175

Apogee: 4,863 ft

The race to complete emFire was a sprint to the finish line, as I was painting the booster section and nose cone the night before, but it all came together in flyable condition for Perchlorathon. I traded in one of my last L630s for an L1175 from Frank to get the rail speed up a little bit. Prep went smoothly, with apogee-only deployment (since my ARRD was destroyed at Balls...) of a Rocketman R14C. I hauled the bird out to the pad on my shoulder, armed the avionics, and installed the igniter. My primary concern was the structural integrity of the recovery attachment bulkhead; I had spent the evening before the launch feverishly filleting and fiberglassing it in to make sure it didn't pull out, so hopefully the epoxy was cured! Hulan called out the count and hit the button; the igniter popped and the motor ROARED to life, lifting emFire gently into the air. The thunder continued for another three seconds or so before the motor shut down with a pronounced puff of black smoke. The big delay element gave nice smoke up to apogee, where the black powder did its thing and deployed the chute; it was all together, and I could breathe again. The landing was gentle about 3/4 of a mile from the pad. A perfect first flight.

I like to design, build, and fly rockets. PostFlight started as a project to help me keep track of them. Now I've opened it up so you can follow along, too.
I fly with:
Indiana Rocketry, Inc. MDRA
Hey! What are you doing down here? The rocket stuff (yea, it's © 2017 David Reese) is up there!