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PiPlane by sr71fan

Discussion in 'Strange Aircraft' started by Crash, Jul 5, 2009.

  1. Crash

    Crash Moderator Staff Member

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    I saw a thread come up not too long ago for this neat little roundish UFO-type plane by sr71fan over at RCGroups.com. There are some neat videos over there showing people hovering this plane around their garage and living room, so I thought it would be a fun one to build.

    My file package is set up for 6mm foam, but if it flies nicely I'll be cutting another one out of 9mm EPP.

    If you cut this one out and you like how it flies, be sure to check out the thread over at RCG and show your love to sr71fan:

    http://www.rcgroups.com/forums/showthread.php?t=888154

    As usual, I'm supplying a COMPLETE file package. :D Attached files [​IMG] PiPlane.zip (286.5 KB)Â
     
  2. TigerPilot

    TigerPilot Well-Known Member

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    Nice one, Crash
     
  3. frankrcfc

    frankrcfc New Member

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    Built that weeks ago fly's great. Used 9mm epp
     
  4. Anonymous

    Anonymous New Member

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    Gee Frank, if you'd built this weeks ago, why didn't you share it with the rest of us?
    Share the Love, man! :)
     
  5. Flashsolutions

    Flashsolutions Active Member

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    I cut mine out this morning. Made a couple mods to the file already... I know, but I just can't help it. I Can never leave anything the way I find it. Always gotta change something. So I put some fold lines in to create the bevel for the elevons and rudder and added a little text cutout to show the name of the plane. msg me if you want a copy.

    Am fighting with my airbrush now. Finally got paint flowing after going back to my original single action airbrush. Seems I have lost an O ring for my double action brush and it just don't like to work without it.

    Anyway, this should be a fun plane to fly. I have a couple of the Leadfeather PbF's that Mike posted and they have become my second favorite plane because they can be flown in close quarters, as will the piplane.

    If you watched the video of sr71fan flying it, you will see that it is capable of real tight maneuvers, well the plane is, maybe my fingers won't be quite that nimble...

    I will post some pics after I get my Pi-Plane finished and ready to fly. Can't wait to see how she flys!
     
  6. Flashsolutions

    Flashsolutions Active Member

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    Here are the first photos, without the electronics mounted. I will need to order another Lazertoyz Blue Wonder before I can get her airborne.

    Attached files [​IMG] [​IMG] [​IMG]
     
  7. 3DMON

    3DMON Moderator Staff Member

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    Something about that bullseye is screaming COMBAT! LOL.
    Looks like it will be a fun plane to fly.
     
  8. Crash

    Crash Moderator Staff Member

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    Flash, that looks great! It's a cute little plane, isn't it? I think it will certainly be another winner.

    I will be PM'ing you with my email addy, as I want your file to see all of your changes. I like the addition of the name on the side. That's what makes all of the PhlatPrinting so much fun - you can always find a way to make a little change and make something your own.

    Great job!
     
  9. Flashsolutions

    Flashsolutions Active Member

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    Dang you Crash... I just listened to your podcast after having already ordered Blue Wonder motors from another source than mentioned in your steals of the week.

    Okay guys, Listen to the Crashcast to find out where to get a deal on a power train for this little guy.

    Emailed the package your way... Feel free to republish any of it if you like.


     
  10. frankrcfc

    frankrcfc New Member

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    I know it Dorsal ;) . Got a ton of em' already built back up since my hard drive crash. I'll get something over here yet I tell ya' ! :D
     
  11. Flashsolutions

    Flashsolutions Active Member

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    Added servos, recvr, motor and prop. Had to steal the motor and ESC from another plane but now that I have it ready to maiden, the wind has picked up and I am in a holding pattern.

    Here are a couple more pics of her dressed up and ready to go out on the town. Added wheel pants just because it looks so kewl even though they do add a bit of weight to the finished plane. Attached files [​IMG] [​IMG]
     
  12. Crash

    Crash Moderator Staff Member

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    I love the addition of the landing gear! You know, for some reason it reminds me of this FAT cat that I have sitting here next to me right now. LOL
     
  13. Flashsolutions

    Flashsolutions Active Member

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    I got a chance to fly the lil FAT cat just a bit today. Still trying to determine the CG balance.

    I was expecting it to fly more like the PbF, but it has its own personality.

    I am still a bit nose heavy and it flew quite a bit faster than I was expecting. It does not handle with the rudder like the PbF at all. I'm not quite sure how to describe it yet.

    At any rate, the rain started coming down just after I got the opportunity to fly it so my time on the stick is quite short.

    I will move the battery back a little and try it again to see if I can get the type of performance I was seeing on the video.

    At one point, while fighting an untrimmed plane and trying to control something that wanted to fly much differently than I was imagining, it swooped down and smacked the driveway slightly. With a huge bounce, it was airborne again and I was frantically trying to regain my composure.

    I was trying to turn it with the rudder but it seemed to turn in one direction okay, but the other direction it would not budge.

    I can see a learning curve is ahead on this one. I think the rudder yaws the plane somewhat, but it takes the elevons to steer it. With my PbF which is a flat 18" square vs round, the rudder actually does steer the plane very well.

    It make for an interesting plane though. I enjoy trying out new designs. It just amazes me how differently the flight characteristics are from plane one to another.
     
  14. Crash

    Crash Moderator Staff Member

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    What CG did you fly it at? I made note when reading the RCG thread about this plane that the CG should be set at 25% (I'm assuming that means 4.5" back from the nose part of the wing).

    I haven't had a chance to cut mine out yet, as I'm in the process of trying to retake my shop back from these CNC machines! :D
     
  15. Flashsolutions

    Flashsolutions Active Member

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    I started out at 4" which is what the PbF uses. I figured the two should be quite similar. But that puts it a bit too nose heavy.

    I moved the battery back to just in front of the servos and got a CG of 5 1/4" which seems to work much much better.

    I was able to get out a little while ago and put it in the air again with the new CG and I like the way it handled much better.

    Starting to get a better handle on flying it. Coordinated turns with rudder and elevons seems to work best. Will probably set up mixing in my transmitter once I get a feel for its characteristics. It is still just a bit windy here. Hard to judge how a plane behaves when you have the elements acting on it.

    Once I know how she behaves in no wind, I will be better able to know what to do in the wind. Right now its a crap shoot. I can't tell whether the wind is making it behave the way it does or whether the plane just naturally does what it does.

    I don't think it is going to make a real good windy day plane, but I suspect in calm or no wind, it will be a blast to fly.

    But afterall, it was supposed to be an indoor plane....

    The thread for the PiPlane on RCgroups is closed. I thought that rather odd?



     
  16. sr71fan

    sr71fan New Member

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    Closed? Maybe just idle, as no one has posted in about a year. :(
    Gary
     
  17. Flashsolutions

    Flashsolutions Active Member

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    Hi Gary!! Well, when I tried to post a thank you to it, it said the thread was closed.

    But now that you are here.... Thank you for posting the plans.

    The weather did finally clear up where I got a nice day with no wind to fly the Pi-Plane. With the CG back further, it flew very well.

    It is none the less "different" from the PbF which I would have thought would have been so similar. But I am having fun with it.

    Have not shown it off at my club yet, but will have it with me this weekend when I go to one of my favorite fields.



     
  18. Dekan

    Dekan New Member

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    Mine flys well in winds up to 13mph...the highest I have tried it in :lol:
     
  19. Flashsolutions

    Flashsolutions Active Member

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    Now that I have had a chance to take it to the wide open spaces to fly, I find it is a hoot to fly!

    Now mind you, I have a whoping big prop ( a modified 11x4.7 ) which gives it a ton of torque.

    I can head straight up with ailerons hard to left or right and the plane spins like a drill bit and pentrates the sky forever.

    Then I just throttle back and floats down so gentle....

    With the target paint job, it draws a lot of stares. Guys wanting to get out paint guns, bow and arrows, and shotguns to take target practice on it.
     
  20. kram242

    kram242 Administrator Staff Member

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    Great job Flash that thing came out great looking!
    Mark
     
  21. Crash

    Crash Moderator Staff Member

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    I've been promising to build Trish a custom "Crash Plane" since the Toledo show, so I've built her one of these beauties! It's built from 6mm EPP of the 1.9# variety, so it's VERY light and VERY sturdy.

    Trish, I'll be getting some carbon for it next week and then putting on a custom PhlatBoyZ logo. After that, it will be on it's way to you... Attached files [​IMG]
     
  22. Flashsolutions

    Flashsolutions Active Member

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    Nice! I need to get some EPP foam. I have a good supply of everything else, but not a bit of EPP on hand.

    I have cut out 4 of these out of FFF for guys at our field who have seen it. I enjoy flying it. I am sure Trish will have a blast with it. The EPP will make it crash proof. No pun intended Crash.






     
  23. kram242

    kram242 Administrator Staff Member

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    NICE MIKE!!! that looks great! :D :D :D
    Great job
    Mark
     
  24. theothers

    theothers Administrator Staff Member

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    Thanks Mike. That is awesome. The paint job really looks great. I can not wait to get it (hint hint)!!
     
  25. Keckhaus

    Keckhaus New Member

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    Crash, thanks for the file, I cut the PiPlane out of 6mm depron, and it fly's great. The guys at my club want to use them for combat because they are so maneuverable. Anyway thanks again for a really good cutting experience.

    :D Ken
     

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