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REV 2.4 - Fri Aug 16 06:39:05 2013

U.S. Army Patriot M-104 (#2056)
P.O. Box 227, 1295 H Street
Penrose, CO 81240
(719) 372-6565
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SPECS: 21.25" x 1.63" - 1.95 oz
ROCKSIM FILE: Right Click to Download
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: A8-3, B4-4, B6-4, C6-5

(Contributed - by Jim Bassham [Who's Who Page] - 05/11/10)

A semi-scale model of the US Army anti-missile missile.

A friend of mine said no Estes rocket built stock can survive more than twelve flights. I decided to prove him wrong with this kit.


Instructions were straight-forward and easy to follow. I built this rocket completely stock and had no problems. I recommend adding all the glue fillets to the cardboard centering rings that they list in the instructions. I used Tite-bond glue throughout and have not had any problems. There is one "gotcha" in the instructions. When attaching the fins, they are supposed to be placed 3/16" from the back end of the tube. I missed this and know one other person who did the same thing. I recommend you mark your tube before you apply the fins in order to get them even.

The finishing instructions are detailed and good. I painted all the tubes instead of leaving the yellow tube plain as the instructions show. It is very important that you put the launch lug in the location shown on the instructions so that it does not interfere with the roll marking decals. Also, do not put the "US Army decal opposite the launch lug, or you can't put the second logo on (It will overlap the launch lug).

Overall a very easy kit to build that looks great stock.

Construction Rating: 4 out of 5

This rocket flies great, but stay away from the small motors. I tried an A8-3 once and nearly had a heart attack. The rocket barely cleared 25 ft and tailslid until ejection about 5 feet from the ground. It was undamaged, but I never did that again. B6-4's and C6-5's work great. I have now flown this rocket more than 25 times and it is still a great flyer. I have won two random duration contests with it since, on a C6-5 it flies 43-48 seconds and the two contests I entered were 45 and 50 second times.

It is my favorite Estes rocket.

The only problems I have had with recovery are that after about ten flights, the shroud lines started coming untied. I finally went back and retied them and added drops on glue to the knots. i have had no trouble since. I had one ejection failure on flight 22 on a very cold day and the chute stuck in the tube. The rocket came in ballistic, with the nose cone flopping and crushed the end of the tube. I was able to straighten it out and have flown it successfully since. I am still on the original chute and shock cord and over 25 flights.

Flight Rating: 4 out of 5

This is a quality rocket that looks and flies great. I would like the decals to be water-slide and would recommend they delete the A8-3 and B4-4 motors from the motor list. Otherwise it is a great rocket.

Overall Rating: 4 ½ out of 5

This rocket shows that if you build an Estes rocket per the directions and take care of it you can fly it reliably for over 25 flights, and I'm still counting. This is one of my favorite rockets.

(Contributed - by Ray King [Who's Who Page] - 08/01/10)

I built this as part of the EMRR Challenge #7 as outlined I built this exactly as the instructions specify and then built a second with my own modifications. This rocket is a Semi-Scale version of the US Army Patriot Air Defense Missile. The rocket is designed to use an 18mm engine and 12” parachute recovery.

  • 2 – BT-60 White Body Tube (6.625” Long)
  • 1 - Yellow Body Tube (3.25” Long)
  • 1 – Blue 18mm Engine Tube
  • 1 - Nose Cone (#72057)
  • 2 - Body Tube Couplers
  • 1 - Launch Lug – 2.375” Long
  • 1 - Std Engine Hook
  • 1 - Green Engine Block
  • 2 - Engine Centering Rings
  • Balsa Fins (3/32” Pre-cut Sheet)
  • 18” – 1/8” Shock Cord
  • 12” Plastic Parachute
  • Decal Sheet

I have to admit it has been a while since I built a rocket completely as the instructions specify. The construction was pretty basic and as usual the Estes instructions were very good. Nice pictures and clear explanations where necessary. This is a basic 4 fin rocket with no real “Gotcha’s”. I would recommend making a copy of page 1 and 2 of the instruction page prior to cutting out the tube marking guide. Once you do this you lose some of page 2 which could be helpful for any re-builds.

In this case I didn’t finish these because I ran out of time to get my review complete so I chose to fly this naked. I did apply a couple of coats of Emery’s Wood Putty thinned with water to the tube and fins. I sanded these smooth. My plan is to paint both as the instructions outline – I will add some pictures of the painted versions to the flight log pictures.

Construction Rating: 4 ½ out of 5

I flew this rocket on 3 different engines: A8-3, B6-4 and C6-5. As I predicted, the A8-3 was scary. The rocket only flew about 100 feet, but the parachute did deploy and the rocket was recovered without damage. The B6-4 and C6-5 were much better flights. There was very little wind and on the C6-5 this rocket flies high – AWESOME!!!

On all 3 flights the recovery was prefect, as I mentioned above the A8-3 is a little weak and the parachute barely had time to open. On the C6-5 even with the 12” parachute the rocket took about 60+ second to land.

Flight Rating: 4 ½ out of 5

Great Flights + Great Recovery = Great Rocket

Overall Rating: 4 ½ out of 5

[Submit your Opinion]

07/10 - "I had two of these kits and unfortunately lost both. I don't remember how I lost the first one but the second went up on a C and drifted into trees... This was my fault though. However, the kit is nice and flies great! The only thing I don't like is that the kit's body tube came in two sections joined by a coupler. This didn't pose a problem for recovery though. I flew it on a D21 from AeroTech and it was gone. I lost sight of it but recovered in one piece. It was maybe 1/2 a mile away from the pad. " (B.S.)

[Enter Rocket Specific Tip]

"" (x.x.)

[Enter Flight Log]
Date Name Motor Ejection/
Wind Notes
06-12-2010 Preston Hoover Est SU B6-4 Apogee - NC Up 5-10 mph winds Event: June Half Blast / Clegs Sod Farm
- First flight for this rocket. It flew well and was recovered nicely.
06-12-2010 Preston Hoover Est SU C6-5 Apogee - Perfect 5-10 mph winds Event: June Half Blast / Clegs Sod Farm
- Love this little rocket flies good and you cna actually see it when iot goes up.
06-12-2010 Preston Hoover Est SU B6-4 Apogee - Perfect 5-10 mph winds Event: June Half Blast
- First fligth for this rocket, that is why I used a B6-4. It flies good. I recovered it close to the pad.
06-12-2010 Preston Hoover Est SU C6-5 Apogee - NC Down 5-10 mph winds Event: June Half Blast
- Good rocket on a C6-5. Flies good and then recovers the same. I will fly this many time to come
06-13-2010 Preston Hoover Est SU C6-5 Apogee - NC Down 0-5 mph winds - With no wind this rocket hit 900 ft. and you can see it perfectly. Nice little rocket to fly.
07-31-2010 Ray King Est SU A8-3 Just Past (1-2sec) 0-5 mph winds - Stock Version - Nice Rocket - Scary flight with an A8 - needs more power
07-31-2010 Ray King Est SU C6-5 Didn't See 0-5 mph winds Flight Picture - Stock - Great Flight - Great Altitude - 2+ Minute Recovery - Awesome!!!
07-31-2010 Ray King Est SU B6-4 Just Before 0-5 mph winds Flight Picture - Stock Version - Good Engine for this rocket and a small field - Good Recovery.
05-25-2010 Jason Orosco Est SU B6-4 Apogee - NC Up 0-5 mph winds - Good flight.
08-07-2010 Vincent Penoso Est SU C6-5 Apogee - NC Down 5-10 mph winds Event: New Hampshire
- maiden Flight! Perfect model. Nice to watch. Delay a little long.
09-18-2010 Vincent Penoso Est SU C6-5 Apogee - NC Down 0-5 mph winds Flight PictureEvent: Big Meadows
- I really love this model. Very predictable stable flight; very nice to fly. the c6-5 has a pretty long delay and was headed down for a while before the chute deployed. maybe a shorter delay is mo bettah!!!
11-20-2010 Vincent Penoso Est SU C6-5 Apogee - Perfect 10+ mph winds Flight Picture - This is one of my favorite models for it consistent & stable flight even in windy conditions.

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