Reviews >>

Estes - Python {Kit} (2129) [1997-2000]

Diameter:1.8400 inches
Skill Level:2
Construction Rating:
Flight Rating:
Overall Rating:

Contributed by William Lee Ojile

Rocket PicBrief:
The Estes Python is a large D powered sport scale air-to-air missile. It is not a scale model of an actual missile. This allows the builder to get a taste for scale effects without the pressure of living up to the real thing. The size of this bird is very impressive for the price and the moderate skill level.

The Python comes in a large hanging box, which I appreciate because I always worry about crushed parts. One look at the fins in this kit and it is hard to believe the quality for the $16.99 price tag. They are just awesome and it is hard to imagine going back to Balsa.

I would agree with other reviewers that the motor mount is way too wimpy. I wish I would have replaced mine but I was in a rush to build of course! I replaced the shock cord with a three foot piece of elastic, the Estes' cord just seemed too short. If I had some Kevlar® thread I would have done a Quest style motor mounted shock cord. I think the Estes style mount is a little scary for this size rocket. Once again, I was in a rush to build. I also purchased a yellow Loc/Precision nylon 18" parachute to replace the Estes plastic chute. I like to beef things up when possible and this is a great kit to do it. Clearly, this kit could handle a larger motor and do well. The strength ! of the fins and rear section of the rocket are awesome when finished.

Construction is pretty straight forward and the instructions are good. I departed from the instructions when it came to mounting the fins. I used liberal amounts CA on the root edges of the fins. After the CA dried I then put a fillet of Sig White Airplane Glue where the fins and rocket body meet. This gave the fin assemble incredible strength. The wimpy motor tube gave me some trouble during fin assembly. The motor retainer clip tore loose and required a liberal dose of CA. I would not build this rocket with the provided motor tube. The motor mount is also placed too high in the rocket body. I would depart from the instructions in this area and place it farther rear-ward.

I purchased this rocket with the intent of finishing it differently than recommended red and white paint scheme. I used 2 coats of gray primer to start off. Minimal sanding was required and I did not fill the grooves. (In the end filler wasn't necessary-I used a lot of paint and that did the filling for me!!) I then painted the entire rocket with 2 coats of Testers Flat Airplane Grey paint. I used Testers Flat Red for the remaining details. I followed the instructions for the stripping on the upper half of the body. I departed from them by placing a red band near the fin assembly. I also painted 2 fins red. A flat clear was then applied. I adjusted my decal placement to fit my paint work. This paint scheme looks great and is really impressive when it is combined with the size of this rocket. I also used Testers silver paint on the radome.

Construction Rating: 4 out of 5

I went with an Estes D12-7 on my first flight and it flew perfect. This rocket is fun to watch and draws a crowd. Boy did that 7 second ejection delay seem long after all the paint work I put in. She landed safely not far from the pad. Installing motors is made difficult by the bad motor tube and mine is really bent after 1 flight!!

I think that the descent was a little fast and a larger chute might be necessary for harder recovery areas. The fins on this kit are very strong but have delicate edges and that may pose a problem with the recommend chute size.

Flight Rating: 4 out of 5

I am a October Sky B.A.R. and have memories of flying rockets with my Dad as a kid. This is my biggest rocket so far and has got the best reaction from my 2 year old son. He was able to see the whole flight and recovery which is important at his age. This kit also flies well on a small field that is close to home. Which is always beneficial when working with kids. Overall this is a great kit for the price and was fun to build and fly.

Overall Rating: 4 out of 5

(by Andrew Pohlman)


If you like military styling and want to jump up to E power, the Python is the best for you. It is a good looking vehicle that has four, beveled, trapezoidal fins, a cool rounded nose cone, and a visible paint scheme. Its large size is impressive, and it produces sane flights with D motors and spectacular, yet recoverable flights on an E. Its fins are through-the-wall (TTW), so it can take the power! This kit is great as is or can be upgraded and modified for a superb result.


Construction is fairly straight forward so get your building supplies out; here goes!

Your first decision is whether or not to beef up the motor mount tube. The one provided is seriously wimpy and does not match the quality of the rest of the kit. Also, the instructions indicate placement of the thrust ring (forward stop for the motor) such that is useless. I recommend putting it in the traditional located: butted against the top of the motor hook. Also at this point, you may choose to move the motor tube farther aft than the instructions call for. This will greatly help motor removal because if you follow the directions, the motor tube and motor hook and quite far up inside the body tube. The motor tube is long enough to accomplish this and the rocket's stability won't be affected. It will turn out fine though if you simply follow the instructions.

The fins come in two pieces and must be assembled using plastic cement. They are hollow and have knife thin edges. This makes them seem fragile, but they are actually superb and far better than a typical pre molded fin can. With conservative use of glue, the fins will be perfectly formed. Once the motor mount is in place, and the fins are prepared, you can insert them into the pre slotted wells. I recommend using a medium cyanoacrylate (CA) on the root edge. This allows you to set a fin in position quickly and move on to the next one. Medium CA sets in less than 15 seconds, so you only have to hold the fin perfectly for a brief time. Use five minute epoxy for the fillets. The combination of CA on the root edge, epoxy fillets, and a TTW configuration makes very strong fin attachments. If all this seems like too much, again, simply follow the instructions for acceptable results.

The stock recovery system provides an optimal descent rate, but would benefit from some upgrades. Using a 1.8 meter long shock cord is one hop up that has been recommended by many Python owners. The paint scheme is simple and easy to execute. Use Krylon for the red and white parts and silver model paint for the shiny nose.

List of Recommended Upgrades/Modifications. A star indicates that it is highly recommended.

1. Beef up the motor tube.*
2. Move motor tube aft an inch.
3. Butt the thrust ring against the top of the motor hook.
4. Use CA and epoxy on the fins.*
5. Add a 1.8 meter long shock cord*, LOC style shock cord mount and parachute
6. Beef tail well by gluing card stock around inner circumference.


This beast is an excellent flyer and is my favorite E rocket. It is very stable and delivers well behaved, predictable results. It does nicely on a D12-5, leaps on a D21-7 (needs adapter) and screams on an E15-7. On a medium to large F, it speaks Japanese and says, "Sayoara!". It refuses to weathercock much and doesn't wiggle or spin. It looks handsome and nimble and has proven to be quite visible on ranges from Lucerne to Livermore and locations in the North San Francisco Bay area. The mid-body separation feature makes for reliable recovery system deployment and reduces the probability of zippering. In addition, it creates a large payload bay! If you didn't move the motor tube aft, you'll need pliers to get the expended motors out.


Design: B+
Construction: B
Flight: A+

[NAR][Sport Rocketry]

The following excerpt is from "Sport Rocketry". The intention is to allow guests to get a basic feeling about a kit. We strongly suggest that you get a copy of the referenced Sport Rocketry and read the entire article. Inside you will find many helpful hints in construction as well as other useful information. For more information, use the two links above.

(Sport Rocketry - Jul/Aug 1997 - page 22 - by Greg Elder)

[Picture]"Overall this is a very nice kit to build and fly."
"A nice feature of this rocker is through-the-wall mounting of the fins."
"The tube seems a bit flimsy to me for D powered flight."
"The top portion of the Python consists of a 12-inch long payload section."
"The nose cone is made from molded plastic and is 6 1/2" long."
"I fly my Python on a D12-5. The flight was straight and recovery was error-free."
"This would be a good first D powered kit."

The entire article gives the impression is that this is a nice kit for an novice/intermediate modeler.

    Flight Log

    DateRocket NameMotor(s)AltitudeNotes
    1997-08-08Ron Watkins's Estes PythonD12-5- Good flight-predicted altitude-600 ft. -good recovery.
    1999-01-17Dave Hanson's Estes PythonD12-5-
    1999-03-07Dave Hanson's Estes PythonE15-7- The Python gets about 1700 ft. on the E15
    1999-04-17Dave Hanson's Estes PythonD12-5-
    1999-05-15Dave Hanson's Estes PythonE15-7-
    1999-09-05Dave Hanson's Estes PythonD12-5-
    1999-11-20Dave Hanson's Estes PythonE6-8- Very slow
    2000-03-21Randy Powell's Estes PythonE15-7- boosted very good,slight weather-cock into wind. ejection was too late. . shredded 2 lines on ...
    2000-04-17Ron Cooke's Estes PythonD12-7- nose cone blew off(found)shock cord broken(repaired)
    2000-06-24Eric Miller's Estes PythonD12-5- Nice high flight. Parachute was not working 100%. Later discovered it was bound by duct tape I ...
    2000-09-10Tracy Singer's Estes PythonE30-7- Great flight on a stock built rocket. The E30 burned too fast. I did not see it leave the pad; it ...
    2000-09-21Donald Besaw's Estes PythonD12-5550 feet Perfect flight, fast, loud, lots of smoke. Flew straight as an arrow up to about 550 feet. Perfect ...
    2000-10-22Andrew Cull's Estes PythonD12-7- Flight perfect. Rough landing do to rock hard clumps of dirt. Rocket undamaged.
    2001-01-13Ron Tribull's Estes PythonD12-5- 1st flight. Hit switch and BOOM...blew off bottom, tore its way thru the rocket damaging the ...
    2001-06-09Andrew Cull's Estes PythonE15-7- Best flight i've done with this rocket screams right off pad.
    2001-06-17Mark S's Estes PythonE9-4- This rocket really hauls on an E9 with fast, impressive liftoffs. Definitely use masking tape to ...
    2001-06-22Donald Besaw's Estes PythonD12-5- Good flight. Parachute ejected but didn't open. Landed hard popping two fins loose. Repairs made. ...
    2001-07-05Donald Besaw's Estes PythonD12-5- Ok flight. Landed hard popping a fin loose again. Getting tired of the dual recovery method. ...
    2001-09-02Jessica McAbee's Estes PythonD12-5- First D motor flight for Jessica.
    2001-11-17John Arthur's Estes PythonE15-7- Shock cord burned through at ejection. Both pieces recovered. Will live to fly again!!
    2001-11-17John Arthur's Estes PythonD12-3- Nice flight.
    2002-04-07Jason Vennard's Estes PythonD12-5- Great flight, Great looking rocket with super straight boost. 18 plastic chute, no problems.
    2002-04-14Jason Vennard's Estes PythonD12-5- Another great flight, nice boost, chute deployed great no problems once again, one of the nicesd ...
    2002-05-25Randy Powell's Estes PythonD12-5-
    2003-06-30Jason Vennard's Estes PythonD12-5- Light east winds. Our 200th recorded flight, this bird does it in style. Another beautiful flight. ...
    2009-02-28Aaron Stanley's Estes PythonC6-5- 2nd perfect flight
    2016-06-22Rob Hoffman's PythonD12-5- Tree. Went back to get it in winter and was gone.

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    What You Can Do

    Recommended Motors: D12-5, D12-7

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    Launch Supplies:

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