Aerotech Sumo

Aerotech - Sumo {Kit} (07813)

Contributed by Taylor Jessee

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Diameter: 4.00 inches
Length: 39.00 inches
Manufacturer: Aerotech
Skill Level: 3
Style: Sport

Brief:
This is a pretty simple rocket to build that is very neat and flies great. It is a single staged rocket, flies on mid and high power motors. Price is a little high but not too bad.

Construction:
The kit includes:

  • 1 4" diameter cardboard body tube
  • 4 fins
  • 2 centering rings
  • 1 motor tube
  • 10' elastic shock cord
  • 1 nose cone
  • 42" parachute

The instructions where easy to follow with very good descriptions and had great illustrations that were very detailed and easy to follow. It was very easy to build--it couldn't have been easier. The fins aligned very well except for one. I had to sand the nose cone to make it fit. My piston was the same size as the body tube which I had to sand for hours. I got it to fit very tight but it bent up the body tube trying to put it in. I gave up on the piston since I didn't really need it anyway. I just used regular X-Acto knives, epoxy, body putty, paint, and primer. I had most of these tools and supplies at home but did buy red and yellow paint at my local hardware store and I got the body putty at the auto parts store.

Finishing:
Finishing was very hard for me since it was kind of cold and a bad brand of paint. I started out painting it with several coats of primer, sanding in between coats. Then I painted the whole thing red, making about 7 coats total. It took about 2 weeks total to do the red. Next I painted fins and below with a horrible yellow. This also took about 2 weeks to do and was quite a bit harder since the paint was uncooperative. I finally got it painted and started putting on the decals. This was also very hard to do. I messed up putting the decals on the fins but the one on the body tube was easy to do. It looks great now. It is a very good rocket but I wouldn't put the piston in it.

Construction Rating: 4 out of 5

Flight:
The first flight was in Argonia, KS in November 2002. It was the last flight I shot that day so I got the G80-4T ready and put it in the rocket. I thought it took wadding but I later found out that It doesn't really need it. I've always put a flame shield in it anyway. It has a engine hook for motor retention. I got it on the pad and then the countdown 5....4....3....2.....1.... lift-off!

With a huge flame, it went to about 50ft and came back and nosed in. Houston, we have a CATO! It shoved the motor up into the motor tube and burned everything. After a quick repair, I flew it again on a G38-4FJ. At end of countdown black smoke went everywhere and the rocket zipped straight as an arrow into the sky for a great flight!

Just this October (2004), I flew it on an H128W at The High Frontier in Pawhuska,OK. It roared off the pad with a huge trail of White Lightning smoke behind it. It went about 2000ft up then it arced and arccced and arccccccced and arcccccccccccced...until it went THUMP and shattered everywhere! All that was left was the fin can. None of the fins were broken, believe it or not! All I need now to fix it is a new body tube and nose cone.

Recovery:
The first flight was awful of course since it catoed! The second flight was great, coming down very slowly on the 10' foot shockcord and large chute. It just missed the trees by about 50ft. The last flight was horrible too since it lawndarted. The nose cone was bent inside itself from the impact since it was going like 300mph when it hit the ground. The body tube was completely torn and crumpled. I can't wait to fix it.

Flight Rating: 5 out of 5

Summary:
It is a very good rocket especially if you are looking for a somewhat cheap rocket for your level one certification. I like everything about the rocket and I would like it even more if my piston would have fit. I would recommend this rocket to everyone.

Overall Rating: 5 out of 5

Other Reviews
  • Aerotech Sumo By Wesley Egan (October 1, 2009)

    Brief: This is a very sturdy 4 inch diameter, 39 inch tall advanced model rocket made by AeroTech. It is a stubby model capable of handling anything from G to H power, sports piston ejection, and comes equipped with a 29mm motor mount. Construction: The component list for this rocket is: 1 4 inch diameter, 23 inch long pre-slotted cardboard body tube 4 pre-shaped ...

  • Aerotech Sumo By Joe Cacciatore

    Single-stage, single-engine rocket with piston ejection system and is suitable for Level 1 attempts. This Aerotech rocket has the standard Aerotech through the wall Fin-Lok™ system and components except the nose cone is a different material than the other Aerotech's. It is gray and presumably stronger. It has 4 fins about the size of the Astrobee D but reported thinner than the ...

Flights

Comments:

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N.L. (November 6, 2001)
I have the SUMO and the piston did not fit so I had to sand it down also I wrote Aerotech and they said that they didn't have any problem. Also I flew mine with an H-128 and it flew OK!
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G. (February 13, 2002)
I found the piston too tight also, even if I sanded some, it would not be enough. Instructions poor with that. I simply removed that system altogether and used a nomex chute protector and 15' kevlar shock cord instead - easier. Other than that a nice looking kit.
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B.B. (April 27, 2002)
I had the same issues with the Piston and the Shock cord clamps. I used tape shims and taped the clamps shut onto the cord to get it to hold. My shock cord failed on its 3rd flight after a slight "bonus delay" the ejection charge fired but it was a bit late. The booster lawn darted from ~ 1500 ft... NC and piston came down with the chute. Booster is repairable, I'll need a coupler and 5 inches of BT. I'll have to fly with wadding and a chute protector as the coupler will not permit the use of the piston.
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T.L.J. (October 21, 2002)
This is a nice kit. I had the same problems with the piston. It was literally the same diameter as the body tube! I just sanded the crap out of it until it fit. I've modified mine with an extra body tube with coupler, etc. (same size body tube that comes with kit) that I ordered from Aerotech and I found doing this helps with the parachute packing, plus it's a much taller and impressive looking rocket! Since the mod it has landed twice in a row with the lower section standing perfectly straight up I've had several launches on a G35-4, and a G80-4, and last week I certified on an H-128 with a beautiful flight.
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R.C.B. (January 30, 2004)
Your review was great in helping me make a decision in the purchase of a Sumo. The great clearance price at our local KC hobby store helped too, but I am very happy with the kit and my first step into HPR. I hope to make my level 1 with this in the spring but now have the largest problem for this rocket...original paint scheme or using another color like hot rod green engine enamel. Have you seen any other colors done in this rocket to make it look good? By the way the piston was not a problem and I have just finished it a few minutes ago with plenty of room for everything. I might even put a beeper in it. Still in debate. Thanks again for your comments, review, and site. Keep looking up.

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