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rhofacker

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About rhofacker

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  1. Does anyone know if there is a Cozy or Long-eze data available for X-plane? I thought I saw one someplace but now I can't locate it.
  2. Are the wings and canard for the E-racer the same (area, airfoil, sweep, twist,etc.) as the Long EZE?
  3. I was just re-reading the CAFE report on the Cozy. He talks about a 3000 ft landing roll. I assume without any braking. What landing distances do you see in common operations? What field lengths are you comfortable flying into and out of? and at what field elevations?
  4. Way cool! We'll try to make it to the chapter meetings. I'm very intrested in your Velocity. As I said it has a LOT going for it and a lot of things I may copy (like the door.. ). I'm really intrested in your Wankle rotary engine. It's a long way done the road but I'm really thinking of going that way myself unless something better pops up in the next few years. ...actually the throw over yoke has some very real benifits: it gives you a lot more room for the navigator. Which ever seat he/she might be in... : and a lot better visibility of the panel space often obscured by the second yoke. I wonder if I could get a Viper in and out of Polly Ranch if I won the lottery...
  5. Well it's official: I'got plans serial number 1299
  6. The debate on Cozy Vs Velocity will no doubt go on for ever There have been a number if threads about it on this forum and in the e-mails flying around. To me the bottom line is: Velocity: larger, roomier (4 real people), easier ingress/egress and kit built (larger initial outlay of $$$). If you ever get the chance to try out the Velocity gullwing doors, you'll be spoiled for life. It really is a major comfort factor. No climbing under or crawling over anything. It beats the snot out of anything else out there: commercial built or homebuilt for a "cross country" type airplane. Cozy: smaller (2+2) seating...(really a nice 2 place with lots of baggage room) possibly faster, possibly "better" ("better" being a very relative term: quicker? lighter?) handling. The center stick is a non issue to me. I've flown several older homebuilts with center sticks - no problem. I also fly a '51 Bonanza with the "throw over yoke - no problem, no sweat. I chose Cozy (plans are on order) because it is plans built and therefore I can lay out the money in smaller chunks (there are other ways to deal with the cash flow issues: a loan for example while interest rates are low...) and I can deal with the other preferential short comings (mine will have doors of some sort - no climbing over the canopy rail for me even if it costs me payload. Even if it's not a "Cozy" any more). After lots of discussions with the wife, lots of spread sheets trying to prioritize and rate features, lots of soul searching the "plans built" was the real deciding factor. If you want a true 4 place or if you don't want to "deal" with converting "plans" into an airplane go with the Velocity. If you want to make any preferential changes (like a door on the cozy) then plans built is the only way to go...
  7. Has any body compiled and/or posted the cost of a complete rotary installation? All the mods, the PSRU, the ignition changes, overhaul costs on used engine if that's the starting point? If you've gotten as far as putting a rotary in your project, what did it cost? What did you buy and what did you build? I've tried to add up the costs and it looks like the initial installation is not cheaper than a certified engine like the XP-360 or the Franklin. Cost savings would be at overhaul time...
  8. I've got a composit learner's kit on order from Aircraft Spruce. I was actually thinking about making two of the desrtuctive test samples Burt tells how to make in his book that I got with my veri eze plans. Make one with and one without the peel ply/plastic routine. weigh them both and break them both. I'd sure like to be confident in a process used throughout the project weighing the peel ply before and after should tell me how much resin I pulled off...
  9. That reminds me of a true story about a wealthy Doc. at the little airport where I learned to fly. This gentleman went out and bought a Lake anphibian and proceeded to land gear up on the runway at my little town. He had the airplane repaired and then landed gear down in the water at the local sea plane port. Contender for a Darwin award? Well, it didn't kill him but still, how would like to have this guy operate on you? "check gear down and locked" should be a prominant landing check list item
  10. +20 kts is a good thing and truth be told in the final analysis the coolness factor is going to play a BIG role. The rest of it is rationalization. There is a long list of issues: time to build, weight, $$$, etc., etc. But when all is said and done are you gonna say to yourself "wish I'd spent the extra time and $$$ to go that last little step"? Not everybody is going to want to put the extra time and money into it. (any problem can be solved with enough time and money ) I suspect you don't have to sacrifice total fuel volume. just put it somwhere else. The "Ifninity" web page addresses this. but let's assume you're willing to pay the price in terms of $$$, and usefull load. I'm trying to think through the installation precess, and see what all gets hit by the "domino" effect. You know: you change one little thing and a dozen others need to be changed also. Some of them unexpected. For example, I had been thinking that the E-Racer style gear would be simpler untill it was pointed out about the unknown (at this point) impact to the design/installation of the rear seat (and that one should have been obvious ). The great benifit of talking about it on a forum like this one is all the different people looking and thinking about it. and, yes, even throwing rocks at the idea. I have plans for a retractable gear from long, long ago for a CA-65. It's totally mechanical (or electro-mechanical) and built with "off the shelf" gears, springs and 4130 tube. So, I'm still mulling that one over too.
  11. ...uuhhmm... I think the E-racer style would not be putting loads on the centersection spar since it's hard points are in the fuselage... But, you're certainly right about unknown changes to the rear seat back. The E-racer retract mechanism occupies a space from the firewall to roughly14" (guessing from looking at sketches/pictures of the E-Racer) forward. Some of that is also occupied by the wing centersection spar. What's the distance between the firewall and the Cozy seat back at the top of the center section spar and the distance at the bottom of the seat back?
  12. With the understanding the the Cozy is a cross country machine not an aerobatic one. what are your opinions about the flying qualities in general and roll rate and pitch/roll control harmony? Do you find the roll rate satisfactory (marginal, excellent, perfect)? and do roll stick forces match pitch stick forces? What GA airplanes would you compare it to? This was discussed in the CAFE report but I don't have it handy and I've heard some criticism of the roll rate/roll authority at low (landing) airspeeds. I'd like to hear opinions from folks with longer actual experience in the plane. How long are you comfortable letting the plane fly "hands-off" in moderate turbulence (while folding maps, getting a drink of water, looking for the pen you just dropped, etc., etc.)?
  13. I've used a similar technique on "stich-and-glue" boats. Basically you cut a series of pannels from plywood, stich them together along the edges with safety wire, flox the inside corner and put fiberglass tape over that. Let cure. Remove all the wires and cover the out side of the boat with fiberglass cloth and epoxy. Sanding as needed, of course . Now, the peelply and plastic works very, very well over the flat and/or simple curves of plywood and I would expect it to work as well on flat (like bulkheads), or simple curves (like the wing) surfaces. But how do you do it on compound curves or concave surfaces? the plastic wrinkles around the compound curves and in the concave corners
  14. OK, Let's assume for a moment that you have decided to commit to retractable main gear. There appear to be two basic systems: 1) the "Infinity" style with the gear attached to the main wing spar and swing inwards to the fuselage and 2) the "E-Racer" style with the gear mounted in the fuselage and swing outward into the wing. What are the "pros" and "cons" of each? Here are a few I thought of: "Infinity" style frees up volume in the fuselage for a fuel sump to recover and/or add to any fuel volume displaced in the strake by the gearwell. "Infinity" style has potentially <slightly> "cleaner" installation: does not have the "bulge" or "blister" covering the wheel that does quite fit completely into the wing/strake. "Infinity" is more complex - oleo strut vs. composite strut. Possible structural considerations in wing spar. $$$? does anybody know the cost of the E-racer gear? Weight? does anybody know the realtive weights of the two systems? Other considerations or thoughts? Other possible system configurations?
  15. Just curious This may be a little off the original specific question but as I read other forum posts about choices I wonder if the more general question might be posed to any builder is: What were your considerations for deciding what project to build, and what was the relative priorty of those considerations? Was the construction material a major concern? (you can learn anything that can be learned) Was cruise performance a major concern? (there are several high performance chioces these days) Was number of seats a major concern? (relatively few with 4, many with 2, many with 1) Or was this (what ever your choice) just the "coolest" airplane you ever saw? (and thats all that really mattered - all the rest was only justification) What other things did you consider? The building has got to be as important as the flying (At least it is to me... ). After all you can get a 50 year old flying spam can for the about the same $$$ that carries 4 people at 150 Kts safely and comfortably and be flying instead of building. I know some people make "snap decisions" and never complete the project or just sell it when they're done. Others ponder for ever and never even get started. The hunt for the "right" project is fun too. But, I do plan to get building. We've got "the hunt", "the build", and the flying". There is lots and lots of interesting stuff here about building and flying. But what about the hunt? Come on folks, tell the truth now. Lets us know how you chose.

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