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REV 2.4 - Tue Aug 17 10:58:28 2010

Performance
Mad Dog 4 Dual Deploy
883 Ragers Hill Rd
South Fork, Pa 15956
(814) 536-8491
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SPECS: 7'-8" x 4" - 200 oz
ROCKSIM FILE: Right Click to Download
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: 54mm H through L

Rating
(Contributed - by Justin Farrand - 01/16/08)

Brief:
After little to no convincing, I wanted to take part in the Midwest Power IV drag race. Tim Lehr of Wildman Rocketry teamed up with Performance Rocketry to bring forth the dual deploy version 4" Mad Dog rocket for $99.00. The MSRP on this kit when NOT involved with this drag race would run you $169.00. I never intended to get a Mad Dog, but in the months prior to MWP IV I decided to get in on the race. It really helped that I had a drop in avionics bay that was already geared up and ready to fly for a Performance Rocketry 3.9" (ID) airframe. My Competitor 4 would not mind. I simply borrowed the bay from my Competitor 4 and I was well on my way. The Mad Dog DD is all fiberglass, has a 54mm motor mount and .125" thick G-10 fins. The drag race was for altitude and individual performance was key.

Construction:
perf_maddog My Mad Dog (as I am sure everyone else's contained):

  • (1) 48" long, G10 fiberglass airframe 3.90" (ID)
  • (1) 24" long, G10 fiberglass airframe 3.90" (ID)
  • (3) .125" thick G10 fiberglass fins with beveled leading and trailing edges
  • (1) 16" long, G10 fiberglass 54mm motor mount
  • (3) .125" thick G10 fiberglass centering rings (3.90" airframe to 54mm motor mount)
  • (1) 9" long, G10 fiberglass coupler tube 3.90" (OD)
  • (2) .125" thick G10 fiberglass bulkhead plates (fit inside airframe)
  • (2) .125" thick G10 fiberglass coupler bulkhead plates (fit inside coupler)
  • (1) 5:1 Ogive fiberglass nose cone 3.90" (ID)
  • (1) .125" thick G10 fiberglass nose cone bulkhead plate

Construction of my Mad Dog was about as easy as it gets. Aside from adding a conical Aeropack Tailcone Motor Retainer, this project was built and ready to fly in less than a week. All parts were scuffed thoroughly, and I began gluing the centering rings to the motor mount as well as the base to the Tailcone retainer. Even though the motor retainer added a small amount of weight, I decided to add it to increase the overall performance of the Mad Dog. Since the goal of this drag race was maximum altitude, I opted to eliminate the common technique of gluing a recovery harness to the motor mount. For my Mad Dog's maiden voyage on an Aerotech K-700, I would switch the plugged forward closure for a plugged and tapped forward closure from Aerotech. After firmly tightening a 5-16" forged eye bolt, I was less overall weight and still had a tried and true method for a firmly mounted drogue recovery harness. After the booster of my Mad Dog was completed, the avionics bay was bolted in place, and I was nearly ready to rock.

Finishing:
Quick and dirty was the name of the game this time. I was limited on time. So I primed the Mad Dog with Duplicolor high build primer, gave it a quick wet-sand with 400 grit wet sandpaper and sprayed the rocket. The booster was painted red, white upper airframe and a black nose cone. I then shot the entire rocket with clear and it looked surprisingly good for a fast job.

Construction Rating: 5 out of 5

Flight:
madDog_launch In a drag race for altitude, there were a couple of ways to lose. One was to have your rocket fail to ignite and the other would be a recovery mishap or damage to the rocket. You were also allowed a “buy" if you were first off the pad. SOLD! That's what I want, first off the pad. Copper Thermite in a K-700 made quick work of leaving the pad first! I came far short of the 12,000+ feet that Dave Zupan, the winner got, but the rocket did reach a respectable 9855 feet. What a fun first flight with about 12 other Mad Dogs screaming toward the blue sky that day!

Recovery:
The MWP IV Mad Drag race also yielded a fun recovery! While following our Mad Dog in the air via radio tracking, I could tell the rocket was a far way down range. After the signal was lost, it touched down. The Mad Dog landed a little over 2.25 miles away to the southeast. Unfortunately, it was dragged by the wind until the booster filled up with a tilled Illinois corn field. Aside from a little field rash, the rocket sustained no damage.

Flight Rating: 5 out of 5

Summary:
For $99.00, the rocket is the most bang for the buck I have even been part of. Even the everyday price of $169.00 is very fair for an all fiberglass dual deploy vehicle. I highly recommend the Mad Dog DD, especially if you are in the market for a L2 capable kit.

Overall Rating: 5 out of 5

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[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
04-19-2007 Justin Farrand AT RMS K700-Altim Apogee - Perfect
(9755 ft)
Calm Event: Walcott, IA
Mad Dog DD - Perfect flight! Saw it the whole way up and down. Drogueless free fall, main at 1200' and landed out in an open filed clear as day.
10-28-2007 Justin Farrand AT RMS K700-Altim Apogee - Perfect
(9855 ft)
10+ mph winds Event: Princeton, IL
MA DOG DD - Midwest Power IV Mad Dog Drag race. Good flight, landed 2.25 miles away!
05-25-2008 Justin Farrand Loki RLD J528-Altim Apogee - Perfect
(2500 ft)
10+ mph winds Event: Walcott, IA
- Shortened version of the Dual Deploy kit. All out the top dual deployment with a home-brew tether device. Acid test, and it worked great!
06-11-2006 David Schat RATT Hybrid K240-Altim Apogee - Perfect
(7884 ft)
Calm Event: ROCstock XXV
Box of Hammers -
   

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