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HPR photos L1-2-3 flights

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Dan Griffing

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Great looking project. What motor did you use for L2?
J270W. But the loaded weight of the dual deployment-configured Zephyr was 8.24lbs so the 2.6 second burn gave a nice slow liftoff that cleared the launcher with plenty of velocity.


1597504370385.png
 

crossfire

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Nice flight. What did you use for L1? For motor?
 

Dan Griffing

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I used an Aerotech DMS H219T with the delay reduced to about 10 seconds.

The Zephyr went about 1400 which was significantly less than RockSim had predicted. But I hadn’t adjusted the design with the actual rocket weight, and I also hadn’t figured out how to use my Altimeter3 correctly so I didn’t collect the flight data as I had intended.
 

crossfire

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I used an Aerotech DMS H219T with the delay reduced to about 10 seconds.

The Zephyr went about 1400 which was significantly less than RockSim had predicted. But I hadn’t adjusted the design with the actual rocket weight, and I also hadn’t figured out how to use my Altimeter3 correctly so I didn’t collect the flight data as I had intended.
I am suprised its weight was over 8 pounds. My Mad Cow Little John close the same size rocket was 4.25 pounds with a 1 grain CTI 38mm G reload.
 

Dan Griffing

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I am suprised its weight was over 8 pounds. My Mad Cow Little John close the same size rocket was 4.25 pounds with a 1 grain CTI 38mm G reload.
It all ads up. In addition to the stock nylon shock cord with a full Nomex shock cord protection sleeve, I had 2-25ft sections of Onebadhawk 3/8" flat Kevlar recovery harness, double layer Nomex protecters for main and drogue parachute, 48" Fruity Chutes Ultra Iris toroidal main chute (7.44 oz) with Nomex chute bag, and numerous quick releases and swivels. The instrumentation included an Eggfinder Proton and GPS, 2-800mAh LiPo batteries as well as a Jolly Logic Altimeter3. The E-bay had redundant charge cannisters for both main and drogue. The DMS J270W motor weighed 1.58lb.

The weight was taken on a well calibrated electronic bathroom scale just before flight. Unfortunately there wasn't room for a kitchen sink.

The Zephyr with the full deployment configuration only differs from the Apogee Peregrine slightly with the fin design. The stock weight of the Peregrine is 5.73lbs. So its not surprising that a fully loaded version of it weighs 8.24lbs.
 
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crossfire

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I can see 5-6 pounds. But it is what it is. Plus expoy adds up fast also.
 

PBic

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What rocket is that? I’m guessing a Sumo.
Yes, it’s a Sumo. I can’t claim the photo though. That was taken by Gary Goncher of Oregon Rocketry. He really does nice work.
 

jbrracer

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Actually all three on pad were cert flights two successful L1 and a mishap failed L2
EFBEDD9A-A55E-4962-8349-711048BE09A1.jpeg
 

Michael Wilson

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My profile pic is my JR Cert rocket.
Not the actual flight, but the same rocket. Got my cert on my second attempt, on the first attempt, the thrust ring was ripped off the loc adapter (guess i shouldn't have used an i-500 for a cert flight). So i took a hacksaw and sent it on an H115DM and it was successful.
 

jbrracer

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My profile pic is my JR Cert rocket.
Not the actual flight, but the same rocket. Got my cert on my second attempt, on the first attempt, the thrust ring was ripped off the loc adapter (guess i shouldn't have used an i-500 for a cert flight). So i took a hacksaw and sent it on an H115DM and it was successful.
What happened to the thrust ring?
 

RobertH3

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John: thank you for the pic - shows my rusto strawberry fields MDRM pre-flight. The MDRM looks great in the air on H115 Dark Matter - 6 second delay to 1400.' Perfect. Looks like Spitzen-sparken non-verkens. Like I said, I have parts for two more MDRM's. One is for my long haul trucker friend but one is for sale - at cost, no markup. If you're in Indiana, you can show up at the ROCI sport launch and I'll bring it.
Includes Estes NC and body tube, and the Semroc upgrade fins and motor mount.
I think the Max is blessed - my first LP version survived a lot of new rocketeer mistakes - melted parachute, hard landings, and even a giant crepe paper streamer when I wanted to fly it again and didn't have a spare parachute. The Rocketry Pantheon smiles on das humor.

Cheers / Robert
 

jbrracer

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John: thank you for the pic - shows my rusto strawberry fields MDRM pre-flight. The MDRM looks great in the air on H115 Dark Matter - 6 second delay to 1400.' Perfect. Looks like Spitzen-sparken non-verkens. Like I said, I have parts for two more MDRM's. One is for my long haul trucker friend but one is for sale - at cost, no markup. If you're in Indiana, you can show up at the ROCI sport launch and I'll bring it.
Includes Estes NC and body tube, and the Semroc upgrade fins and motor mount.
I think the Max is blessed - my first LP version survived a lot of new rocketeer mistakes - melted parachute, hard landings, and even a giant crepe paper streamer when I wanted to fly it again and didn't have a spare parachute. The Rocketry Pantheon smiles on das humor.

Cheers / Robert
roberto whats the DL on the MD?

LOL
 
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