OSF - OneSheetFloater yup, another one... vids too! - RC Groups
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Feb 17, 2011, 01:18 PM
treefinder
springer's Avatar
Build Log

OSF - OneSheetFloater yup, another one... vids too!


I'm finally at the point to start documenting this one...
This is the fourth OneSheet plane (OneSheetGlider, OneSheetBipe, OneSheetWing), and follows the same principles: Make a plane completely out of a single sheet of Dollar Store Foam, and use up as much of the sheet as possible (minimum scrap). This guy comes from two different directions, First on one of the other One Sheet threads someone asked why I hadn't done a nice simple high wing monoplane trainer type yet? To which my answer was: "I dunno..., hmmmm...." The second 'direction' came in a thread in the Modeling Science forum where someone asked about a plane that could fly at a walking pace and targeted 3mph as the cruise speed (with the assumption that it was flying on the wing, not the prop). Several posters indicated that it was probably impossible to make one that would fly that slow, and still be durable enough for outside typical park flying. another "hmmm...." moment.

So, here she is, in addition to the one sheet criteria, I added high wing, lots of wing area/span for max lift at slow speed and keep weight extremely light. The V1 as glued up just foam (before motor mount and skewers) weighed 2.4oz (a full sheet of DS foam without paper weighs 2oz).

I have discovered some weaknesses in the design already, particularly wing incidence wasn't enough positive. That's been corrected in the cut sheet, but the V1 still has a wedge of foam under the Le. I also don't know yet if she'll fly at a walking pace, as the winds have been 4 (Tuesday am) to 14 (this morning when I finally got the incidence right). But I can testify that she will fly controllably in that high a wind. Not really fun, as mostly fighting the wind, but I can put her where I want.

Specs:
37.5" span
7" Chord
24.5" OAL
4.66oz auw less battery 5.86oz with 610mah 2s Rhino
Final version with paint and landing gear is 5.51oz without battery and 7.32oz with 800mah 2s pack.

HK 20 gram 2300kv motor, 6030 prop, HK 8-10ampss esc
two 5 gram hxt500 servos
cheap 72mhz rx.

OneSheetFloater 2-17-11 (2 min 37 sec)
Last edited by springer; Apr 21, 2011 at 06:49 PM.
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Feb 17, 2011, 01:39 PM
treefinder
springer's Avatar

Cut sheets


Here's the full size and tiled cut sheets. At this point it's kinda a puzzle for those who like a challenge, as I haven't gotten to labeling anything yet. Do ya think you can figure it all out??? I'll get the labeling done soon.

Also, here's a picture showing the scrap areas. Even those aren't really going to be scrap as if one does landing gear there will be need for some more reinforcements on bottom of fuse that they can be used for.

2/12/11 edit: Heath (Dumbthumbs) has discovered an error in the cut sheet. The servo tray was drawn longer than it should be. I've corrected the cut sheet and the interior bits .jpg file to show it correctly. (should be 5" between formers).
Last edited by springer; Oct 30, 2013 at 01:04 PM. Reason: adding two pictures showing part locations.
Feb 17, 2011, 02:50 PM
Registered User
miamiracer305's Avatar
you design them quicker then i can build them. keep up the good work
Feb 17, 2011, 02:59 PM
Registered User
Hey Springer,

Nice looking flyer. I'll bet she's slower than the speed of thought, a much appreciated
feature for some of us Olde Phartz. LOL! I've got a sheet and a half rediboard pusher
I've been playing with. Great flyer, very well behaved and slower than molasses.
Problem is, I havn't figured out Sketch up as yet. Anywho, your latest is next on
my list and I just bought 10 fresh sheets of rediboard this week. Keep em' coming!
Warm regards, Jim
Feb 17, 2011, 05:37 PM
treefinder
springer's Avatar
Jim: if you have any sketches, or even a picture set (front, side, bottom, top views) I could to a model for you to view and approve. I did Jimmy's Jbug like that, we took pix of the plane and I scaled the parts to it.
Feb 17, 2011, 10:16 PM
Registered User
AJ750's Avatar
another gem springer! i like the variable dihedral! did you use skewers on the leading and trailing edges like your always telling me too?!
Feb 17, 2011, 10:27 PM
treefinder
springer's Avatar
Nope, and I guess I should comment on that somewhere around the vid. I wanted to go as light as possible, so just did the LE tape. That vid is actually the second flight, the first I apparently double hit the cam button and got nothing, but the loop in that flight curled the wings twice as much! That doubled LE adds lots of toughness, I'd guess! Once I figure out if it'll go as slow as I want, I'll probably add the skewers at LE and TE, so it'll fly "normally".....or not.
Feb 17, 2011, 11:20 PM
Registered User
Nice spot landing . You must live in the land of plane eating trees. I am a fan of flex wings after making my little flexwing dart.
Feb 18, 2011, 02:09 AM
Registered User
That's was absolutely, hands-down, the most gentle landing into a tree I have ever seen. I swear it looked like the OSF hit a pillow a plopped down right beside it

I love your one sheet series. Even though they're not "OH! WOOWEE LOOK AT THAT!" models, it's cool that they're made out of 600 sq. in. of foam. Hey, that gets me thinking. You could try a PBF style one sheet model with an undercambered foil just like the drenalyn. Most of the sheet would serve as the "wing" which would give you almost 4 sq. ft of wing area. Just a thought

- Jeff
Feb 18, 2011, 03:27 AM
Build straight - Fly twisty
Whiskers's Avatar
Once more I am gob-smacked by the way you fit all those parts into that little 20 by 30.
Very clever indeed, and it flies well too, even with the extra weight of the Super De Lux Tree-finding RADAR set.
Feb 18, 2011, 07:35 AM
Vertical approach specialist
potshot's Avatar
I think it's actually the trees that do the finding. They find my golf balls as well as my airplanes.
Feb 18, 2011, 11:43 AM
Registered FFF Addict
larryross's Avatar
Yaaa... another one sheeter.
Feb 18, 2011, 05:21 PM
treefinder
springer's Avatar
Larry: how you doing, guy? Continuing to improve, I trust! Now don't you and AG go and do 900% versions of this!

Jeff: I appreciate your appreciation of the lure of these. I need to go back to the sketchup models and do a % utilization exercise to see how they stack up! I've not been much of a fan of PBF's, mostly staying with planes that look (at least a bit) like real planes. However, a sorta PBF lifting body would be intriguing.....

Graham: son of a gun, how'd you know I squeezed that into her????? I'm using the latest version of firmware, as you can tell by how gently I put her into the tree!

TW: I'm not sure if it's me or the trees, but my planes seem to have had an affinity for them, even before I got the new TF radar! 8^)
Feb 18, 2011, 08:38 PM
Registered User
Hey Springer,

Nice movie! Your latest looks like it'll be a real pussy cat when the winds drop out.
Appeared to be a pretty challenging day for a maiden. Nicely done!
I appreciate your offer to help post my pusher. I wouldn't have mentioned it had I
not have had surgury that day and been enjoying some pretty effective meds. LOL!
Down the road, I'll draw up some clear plans and make some digital photos that I can
email to you on a not to interfere basis. It's cute as punch but not at all complicated.

Meanwhile, be on the alert for those darned attack trees. Warm regards, Jim
p.s. Catchy paint. I like it!
Last edited by Jim Hatch; Feb 18, 2011 at 08:46 PM.
Feb 18, 2011, 10:57 PM
Registered User
Great plane! I might have to build me one of those. I really like your minimal scrap design. I'm guessing you were a master at Tetris? Nice Tree point landing!


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