After prepping all day, my Mavericks Sledgehammer rocket blasted off the pad on a Aerotech M1550 Redline motor, brightly illuminating the clouds with its red 8 ft. tall plume. (large size, More Sledgehammer Shots

This was the biggest launch of the day, with the largest motor class permissible in California. Pulled 8 g’s on the way to 450 MPH. 

Ground Video: My son set the camera on some rocks for the launch so he could cover his ears. =) So we don’t have tracking, but a good sense of the sounds that the crowd heard back at the flight line. 

It was a perfect flight, with on-board video capture the whole way, even through the landing. 

On-board Video: For those new to high-power rocketry, I should explain a few items: 

At the beginning, the beeping sound you hear is one of the flight computers signaling which of the pyro channels is connected. This is used to deploy the parachutes at apogee, based on barometric and accelerometer sensors. 

The camera is pointing outward from the rocket, looking back to the flight line. It is a Sony PC-1 with a wide angle lens. 

After launch, it goes into a bit of a spin. You can see how fast it gets up out of the clouds. 

The turbulence up top is the BP explosion deploying the parachutes. The nose cone has its own 60” chute and can be seen briefly. 

I would not recommend watching the whole video as it takes a while to get back to ground… unless you are interested in the spinning survey of Snow Ranch. 

At the end, an excited spectator helped me find and recover the rocket. 

Also, I entered this launch in a contest to see how close I could get to exactly one mile of altitude (5,280 ft.). 

Near the end, you can hear the audible signal of the peak altitude recorded by the flight computer: 5 beeps, 2 beeps, long beep, 4 beeps = 5,204 ft. 

Not bad at all. And so, I think this will be the first big rocket to earn a spot on the LUNAR mile high wall.

24 responses to “Redline”

  1. Looks like the highlight of the launch, Steve! Sorry I had to miss it (it was my mom’s 80th birthday party), but congrats on going L3.

    – Jack

  2. haha loved the On-board Video. Feels like the computer is looking and talking to humans, standing in front of him… =)

    And little J seems to had some fun too =P

  3. Great shot here! The video was cool also. I took you advice and did not watch the entire thing, but even the float back to earth has got to be better than 90% of the youtube videos out there…

  4. Cool launch, but what made you switch from Revver to YouTube? 🙂

  5. awesome video steve!

  6. Love that sunlight on the rocks back there.

  7. So how well did my parachute packing techniques work out for you? I’m am glad I could help you prep for the flight. Sorry I couldn’t stick around and watch.

  8. Go PC-1 !!! Talk about getting mileage out of a camera. Excellent Steve – making me think about rocketry differently. Nice Plume shot.

  9. Thanks y’all. It was a blast.

    Victor – go on. I like your thoughts.

    A Stanley: It worked like a charm. And it was a challenging near-horizontal deployment. Since I have two chutes for the two separate sections, there was less chance of a head banger up there… but who knows, your nested loops in the kevlar cord may have prevented a nasty zipper.

    heet_myser: me too. The setting sun near the end of the launch waiver made for some nice lighting as the rocket was in the shadows.

    schoshie: waiting for copyright approval over there was just too much friction

    Oh, and for a sense of scale…

    The Sledgehammer

  10. The daisy chaining the cord helps prevent zippers and causes the chute to deploy more softly so it’s not a instant jerk which can lead to ripped out u-bolts, zippers or broke cords.

  11. cool, like the simple solution for stating the altitude, though I’m sure to some degree defining that would be more difficult


  12. May I have the honor of inviting you to join and post your photo in:
    FIRE FIRE FIRE

  13. This is a cool rocket launch shot.. Its so much bigger than the little versions we fly over here in the UK… Nice!

  14. Wooowww interessing photo!!!!
    very spettecular photo!!
    ciao ciao

    Nino

  15. This is beautiful. I’ve been wanting to get into advanced rocketry for a while now. This might be the inspiration I need.

  16. Go for it!

    I just noticed that Aerotech is using this photo and my Double-E to illustrate high-power and mid power rocketry in their Rocketry 101 page.

  17. Hi, I’m an admin for a group called Creative Commons- Free Pictures, and we’d love to have this added to the group!

  18. Thank you for letting us use this awesome image = )
    The Escape

  19. very cool.

    For reference, this is the thrust curve for this motor:

  20. Thank you for choosing creative commons

    Happy New Year 🙂

    * The Rockettes!! *

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