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stol1

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About stol1

  • Birthday 01/08/1956

Information

  • Aircraft
    Zenith 701
  • Location
    Alabama
  • Country
    USA

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  1. I am building a zenith 701, and have (4) ea-81 motors at my disposal, one with a rfi belt re-drive, and a fresh build on the motor. If I run this engine, it will have a spg re-drive, 24 lbs, less starter, a custom flywheel, 8 lbs or less, a carbon fiber intake, with a aeroinjector, maybe a aluminum oil pan, and aluminum pulleys, and a 20 amp permanent magnet generator.3 lbs . I will also be using aeromomentum's radiator, and am undecided about the prop. I have looked at exhaust but am also unsure there. A cam re-grind, and head work, hopefully will put me at 100 horses. If I go this route, I hope to see weights in the 170 pounds even if I have to cut off unneeded bosses on the motor. What are your ideas/ suggestions?
  2. Interesting information but I will continue on my build till I am just about finished, then make the decision. If I had to decide now, I would lighten the ea81 with custom built parts, an swing a 70-72 inch prop with spg3 re drive, ratio being 2.34/ 1. I think I can get the weight down in the 170 pound range. After a cam re-grind, and head work, it should be around 100 horses. Just extra build time.
  3. Does anyone know how to take the weight off the ea-81? I recently had someone say that one guy had it down to 165lbs with the 40 lb re-drive on it. That would be in the rotax range.
  4. I have considered the 3rd,.or.4th generation 2200's, and may still choose.it. What would be your recommendations?
  5. I have the same problem with choosing an engine. Here in the states, there is a company called aeromomentum that offeres a suzuki based auto conversion. I have developed a criteria for what I want. A lot depends on if you are able/ willing to do work yourself for the fwf components. The ea-81 can be made to produce the h.p., and enough weight removed to make it suitable for the 701, which I am also building. If I go that route, I can expect at least 6 more months of fabrication time. I would use a airtrikes spg redrive, custom made flywheel, oil pan, intake, with a cam regrind, and ported heads, with aeroinjector fuel delivery. All this requires extra work on one's part. If you are looking at a plug and play setup, be prepared to spend the money for someone's design,and problem solving. Support is critical if you aren't mechanically savvy. Parts availability, reliability, fuel consumption, tbo, and performance are also important. Oh yes, and cost. Many of are in the affordable category of flying. I look at the D motor, love the simple design, and basic direct drive, like the jabiru, but what are the weak points of this engine that time usually reveals? What are the parts availability, and support? Who's flying behind it? If I have to buy a plug and play, I would find a slightly used 2200, and make it work. There are some out there, and parts up-grades are available, and the engine, latest generation, has been refined. At 141 pounds, you will find the cg's suitable for most of the battery, and other necessities, can be mounted under the cowling, which comes in the fwf kit. The aeromomentum looks like a good conversion, and many parts are available at your local parts store. Their engine comes with a fwf kit for the 701. I do not have any specs on that engine for the 701, but there is one about to fly. For me, I have a mechanical background, I want a 4 stroke, at least 1500 hour tbo, 80-100 hp, easy access to parts, reliable, smooth, affordable, and have at least three people flying behind it to use as references for when you have questions. Another factor may be support. A few years ago, subaru conversions were all over the place, now not too many companies support them, so you will be on your own, but there are many people flying behind them to give you advice. On a budget, with a little help, and work on one's part it still makes a nice conversion for planes. Harmonics, and vibration are almost non-exsistent, you can swing a 70-72 in prop, and be considerably thousands less than those others. I have heard of those motors, with a 40 pound belt redrive, weighing 165 pounds, but it requires work. Hope this helps. Fellow 701 builder
  6. Good folks, know their stuff, and will be a great builder support. Waiting on their first 701 rollout. Thanks
  7. Just Landed! Am located stateside. Building a zenith 701. I am a better than half way. Looking for engine options, I have some subaru Ea-81's, and 82's. Have looked at Jabiru. Only looking at 4 stroke, close to 100 h.p., decent rate of climb, dependable, and reliable, easy to get parts, all at an affordable price in the U.S. Sound crazy? Ideas?
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