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Fruity Chutes 3Kn200 Contest at LDRS

 

This contest is sponsored by Fruity Chutes and is like a TARC competition for big rockets. The contest requires the flyer to send a rocket containing a 12oz unopened beverage can up to and as close to 3000 feet as possible. Beverage can be pop, beer, etc. Just unopened. And to make it more interesting the total flight time from lift off to landing must be as close to 200 seconds as possible. For scoring each flight gets one point for each foot over or under 3000 feet, and gets 10 point for each second over or under 200 seconds.

If the 12 oz beverage is damaged and leaking, or the rocket is not flyable the flight is disqualified. Each flyer can make up to two attempts and the better of the two attempts will be counted. The flyer with the overall lowest score wins first, then second and then third. First place winner gets a $150 gift cert with Fruity Chutes, second place winner gets a $75 gift cert with Fruity Chutes, and third place winner gets a $50 gift cert with Fruity Chutes!

The scoring will be done first thing Sunday morning and the winners can immediately redeemed at the launch for product, or can be used later for webstore purchase!  You do not need to be present Sunday to win!

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LDRS37 Crayon Competition

The LDRS37 Crayon Rocket Competition

Photo: John Coker

Fly your Crayon rocket to the limit and try to win in each of the 3 drag categories.

Competition Rules

Winner in each category

  • First off the Pad
  • Lowest Altitude
  • Last to Land

3 Heats

  • Heat 1 – Fliers 1-8
  • Heat 2 – Fliers 9-16
  • Heat 3 – Fliers 17-24

Winners in each category

Motor

H motors only (29 or 38mm)

Kit Details

The 38mm kit can be ordered from Discount Rocketry and you can purchase the 29mm kit from Bay Area Rocketry.
You will still need to buy the Crayon “Bank” itself from Toys R Us, it is 36″ tall and 4″ diameter – other suppliers like Michaels and Hobby Lobby or Amazon stock the “Crayon Coin Bank” (airframe) as well. For more information, see John Coker’s Crayon Rocket page.

Signup

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 Simulation

 

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LDRS37 Avalanche Competition

LDRS37 Avalanche Competition

If you ordered the kit already, you should get it this week or next. The build should be simple, the question is – are you ready for it? – The LDRS37 Avalanche competition !!!

Competition Rules

  • Mad Cow Avalanche Kit (special limited time offer of $99.99!)
  • Any 54mm/75mm motor you can fit in the rocket (subject to the waiver)
  • Up to 16 FLIERS (2 Heats of Eight) (we may extend depending on interest)
  • Up to Two Winners (1 per heat)

Scoring

Up to 100 points, in each of the categories below.

  • LDRS37 Decal – 5 pts
  • Most beautiful rocket – 5 pts
  • First off the pad – 30 pts
  • First on the ground – 20 pts
  • Highest Altitude – 20 pts
  • Shortest recovery distance – 20pts

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Simulation Files

 

Flight Constraints

You will need to have at least 4 oz of mass in the nosecone and 5 oz of mass in the avionics bay to achieve good stability margins. The CP is located 37.8″ from the nosecone tip and with a K185, a flight to 11k’ AGL is possible without stressing the rocket too much.

In order to fly above Mach 1.27 special considerations need to be made (see below), nominal flights can be had with J245, J315R with minimal stress to the vehicle if properly built.

The K250 and L motors will be prudently reviewed before flight is attempted, especially 75mm variants. Those which have a loaded weight < 10lbs will not be allowed to fly.

Nominal weight of the rocket is 5.8-6lbs.

 

Flight Requirements

The AeroRocket AeroFinSim 4.5  Fin Flutter and Stress Analysis program was run with the Avalanche kit parameters. Critical information is that the “default kit build” will only support flight velocities up to 1409 ft/sec (Mach 1.2727) at the TCC Launch site (Sea Level). Adding 1/32″ lamination (tip-to-tip), if properly performed will allow flight velocities up to 2570 ft/sec (Mach 2.336).  5/32″ fin fillets are recommended to increase bond strength.

 

 

 

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LDRS37 Demon Dragrace

The Big one is finally going to hit Central California

THE LDRS 37 DRAG RACE

Lets make the ground shake in Central California – 77,000 newtons with one push of the button!

We have spots for 8 entrants in a drag race with Wildman Demon 150’s on Aerotech M2500’s
There are only 6 spots left as of right now.

If you would like to get into this we have an offer almost to good to pass up.
Buy a Demon 150 for $650 plus shipping.

Bring it built to LDRS, enter the drag race and get the M2500 with complete 98/10240 hardware for only $399.99
Regular price for this combo would be $1979.99 that’s almost 50% off!

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Editorial Note: Also see the Demon 150 Decal set from StickerShock.

 

Simulation files

NOTE: The rocket flight weight is between 45-50 lbs and sims from 10-12K depending on finish and launch conditions.