Edmonds Aerospace Ecee

Edmonds Aerospace - Ecee {Kit} (ECEE)

Contributed by Alan Rognlie

Manufacturer: Edmonds Aerospace
Skill Level: 1
Style: Glider
(Contributed - by Alan Rognlie) 

[Rocket Pic]After my good experience with Edmonds Deltie, I decided to try this model from Rob Edmonds. I ordered it from Apogee Components (along with a second Deltie, a plan set for a Nike Hercules and a couple of his technical reports) and it arrived within 4-5 days. This kit builds to a nice mini-motor (13mm) rocket glider - i.e. no parts are dropped at ejection. During boost, the movable portion of the canard is free to move. Actually, with the positioner placed under the movable portion the canard tends to have a negative incidence. The ejection charge pushes forward a body tube plug that forces the canard to positive incidences. All the balsa parts for this kit are laser-cut, except for the nose and the BT plug. Like a Deltie, this results in a self-jigging kit that is extremely easy to build. The only nit I have to pick is that Rob does not include an engine hook or an engine block in the kit. The engine is to be held in place with masking tape. I added an engine block to positively position the motor during boost, and I'll hope the tape will hold the motor casing at ejection. 

Other Reviews
  • Edmonds Aerospace Ecee By Hank Helmen

    Brief: The Edmonds Ecee is a balsa single stage 1/2A sized rocket boosted canard glider that uses variable geometry during recovery glide. Construction: A plastic bag contains all laser cut balsa wood. The particular kit built for review had very lightweight wood. Perhaps too light. More on that later. Included in the kit are nicely laser cut parts, two sheets printed front ...

  • Edmonds Aerospace Ecee By Alan Rognlie

    - by Moira Jean Whitlock Brief description: This is an all balsa wood glider that flies up like a rocket and is recovered when it glides down like an airplane. Pros and cons of construction: The parts are all there, secure within a plastic bag, Nothing was broken or defective. The fuselage of the model is panels of die cut plywood, as are the wings and canard. The motor tube is spiral ...

Flights

Comments:

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K.W. (September 1, 1999)
This rocket performed like a champ for me. I added a home-built engine lock from a piece of music wire, which worked fine for me (I really hate engines held in with tape). It did finally cato (looks like a full-immediate burn on the engine), which ate it, but I bought another one and will soon be flying again!
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G.A.D. (June 25, 2002)
I really like these Edmonds kits. I built the Ecee on the morning of a launch and took it there with the glue still wet. We left it in the car to "heat-cure" and flew it at the end of the day. The 1/2A load provided a moderate boost, and the glider rounded over and appeared to be trying to glide. At that moment the taped-in motor ejected itself from the glider with a very loud "POP" and the glider shot forward and up like a scalded cat. It then settled into a flat glide that drew applause from the crowd. Obviously, I had no chance to glide-test it, and there was no clay provided in our kit, but the Ecee flew very well even without the spent engine in place. It seems that a stronger engine restraint system is in order, but even if the engine comes out, it glides well.
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J.R.R. (September 23, 2002)
As the review said it is a very easy and quick build and parts are cut smooth and accurate and fit together well. I tried doing some hand tossed glide tests in a grassy area and after a few test glides I succeeded in breaking the boom as shown in the picture. I glued it back together with white glue. On it's maiden flight I think I used a C motor. (It's been awhile)It boosted straight and high and then while very high and still ascending the boom broke again in the same place. It all tumbled back down slowly in two pieces with the wing and boom section occasionally gliding a bit. I guess I should have patched it back together with CA or epoxy instead of white glue. I am not sure if the flight stress broke it or I think it might have broke from the torque from the ejection charge as it vented out the vent hole. I have not put it back together again because I am still debating on reinforcing the boom at the break with a couple of small pieces of balsa or paper or just use CA or epoxy. I am afraid if I splint it, it might make the nose to heavy for a good glide. A friend of mine gave me this kit and also got one for himself. His flew great and sustained no damage. It glided so straight though that we thought it was going to fly out of the field but it came down before reaching the trees. He tried sanding a slight bevel on one side of the vertical fins to induce a turn but on the next flight it still glided very straight. The way the boom is notched for the canard makes for a stress point at the trailing edge of the canard. I think it might would not be as easily broken if the boom was not notched for the canard and just glue the canard straight to the bottom of the boom. Of course this change would have to be done by the manufacturer as the boom comes already notched.
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D.B. (February 18, 2007)
This is my favourite Edmonds kit. A refreshingly different build to your normal 3FNC rockets, but still straightforward. Be careful how you affix the canard, it must not touch the fuselage when deployed - if it does, there is a likelihood of catastrophic failure when the ejection charge forces it into place at high speed and the movable canard slaps into the rigid body. I made the mistake of placing the trimming clay at the rear of the glider. This meant that the masking tape used to retain the motor slipped off at ejection and the glider spat the engine. Despite being trimmed with a spent engine, the Ecee kept gliding for what seemed like hours. I will have to get the Thunder version as well.

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