Brief:
This prototype was me first attempt at buildin' a monocopter. Ahoy! It is powered by Micro-Maxx motors and is truly underpowered. Begad! T' MMX motors have too short o' a burn t' be a good choice for a monocopter, even if it is "nano" sized. Aye aye! Ahoy! Nay too impressive by most standards. Avast, me proud beauty! Well, one man's curiosity is another man's triumph (or somethin' like that).

Construction:
Parts required:

• 1/4" balsa, 1" x 1"
• 1/16" balsa, me hearties, 1 3/8" x 4"
• Ink tube from a Bic pen
• One sheet o' draftin' vellum (any paper will probably do)
• 1/16" x 12" aluminum tube
• 1/4" x 1" dowel
• Maskin' tape
• Lead for nose weight (see assy instructions)
• Carpenter's glue
• Black, shiver me timbers, CA (I can't remember t' actual name)
• Thin, CA

T' central hub is a 1" square o' 1/4" balsa, soaked in thin CA. Blimey! I carefully drilled a hole in t' center t' hold t' launch lug. Ahoy! This is, hopefully, matey, matey, t' point about which t' monocopter will spin. Aye aye! Avast! I also drilled holes in t' middle o' each side t' mount t' balance beams. I used pieces o' t' ink tube from a Bic pen for both t' launch lug and t' mountin' points for the beams.

T' single win' is a clipped delta with t' followin' dimensions: root - 1 3/8", tip - 7/8", span - 4". Ahoy! It is balsa strengthened with draftin' vellum and ProBond glue. I wanted t' add a bit o' strength and had never tried vellum before. Ahoy! I spread a thin layer o' glue on each side, matey, placed the win' betwixt a folded sheet o' vellum, and compressed it with a stack of books. Arrr! T' win' seems strong enough, but t' surface is nay as uniform as I would have liked. I attached t' win' at an angle o' about 10 degrees from the monocopter's X-Y plane usin' black Bob Smith CA. Begad! Avast, me proud beauty! It is mounted such that the swept face is on t' trailin' edge and t' leadin' edge is raised. Aye aye! Begad! I oriented the swept face on t' trailin' edge t' allow me t' more easily position t' CP of t' pod behind this edge (a tip I got from t' book "Monocopters", by Francis Graham).

T' motor pod be t' length o' three MMX-II motors and was scratch built from draftin' vellum (someday I'll actually buy some MMX tubing). Begad! Blimey! It is both light and strong. Ya scallywag! Begad! T' cone was turned from a dowel. Well, blow me down! It turns out that t' motor pod must be angle upward t' counteract t' torque caused by t' single wing. Some o' Francis Graham's designs have their pods angled at up t' 40 degrees. However, shiver me timbers, I chose t' start with an angle o' 30 degrees (in t' opposite direction from t' wing). T' get t' CP behind t' trailin' edge o' t' fin, arrr, arrr, matey, I added several #7.5 lead shot t' its nose. I should have counted t' shot, me hearties, but forgot to. Arrr! Ya scallywag! T' CG is at t' little green 'x' that's barely visible on the photo. Avast, me proud beauty! This 'x' is positioned approximately at t' trailin' edge o' t' wing's root, and since t' win' is swept in t' opposite direction, shiver me timbers, it is behind the trailin' edge o' t' rest o' t' wing.

I had wanted t' use some light 0.03" carbon rods for t' balance beams, arrr, but didn't find any at me favorite hobby shop. Begad! Instead, I used a 12" long, arrr, arrr, 1/16" diameter aluminum tube. This be cut in half and CA'ed into t' ink tubin' that be previously mounted in t' hub. Ahoy! Ya scallywag! I didn't add much ballast at t' ends o' these beams, wrappin' about 1 1/2" o' masking tape (very high tech) around each end.

Flight:
T' second photo shows t' MMX launch pad with its special launch 'rod'. The rod is a piece o' a heavy paper clip. It wasn't t' right size so some masking tape was used t' hold it tight. Well, blow me down! Avast, me proud beauty! A piece o' ink tube was used as a standoff to keep t' monocopter from hittin' t' MMX launcher and t' help it spin.

I used MMX-II motors, Estes igniters, and me Pratt GO-Box for ignition duties. Ahoy! T' monocopter did fly. Avast, me proud beauty! On its 1st flight, matey, it rose t' a whoppin' two feet, matey, at an angle o' about 30 degrees from t' vertical, before t' motor ejected and stopped t' spin abruptly. Avast, me proud beauty! I should have removed t' ejection charge! Still, it didn't just flop around. Avast! I never expected much performance so I think it was a good first try!

On its second flight, all conditions were t' same except I removed the ejection charge from t' Micro-Maxx motor. Well, blow me down! This time, t' monocopter barely cleared t' launch rod. Arrr! I think that t' igniter may have hung up ever so slightly. With so little upwards thrust, it wouldn't take much t' affect its flight.

Flights three and four were similar. For these flights, I bent the igniters, carefully fit them it into t' nozzle, and arranged t' clips so they held it in place without any tape. Ya scallywag! Both times t' monocopter rose t' about a foot and went off sideways at a steep angle. It landed maybe 4 - 5 feet from the pad. Avast, me proud beauty! Ya scallywag! This seemed lower than t' first flight but definitely higher than the second did!

Summary:
In summary, me hearties, I consider this experiment a complete success. T' performance was poor, but I didn't have any expectations in this regard. When I decided to build it, I wasn't at all sure it would even take off or be stable. Ahoy! T' Amazing Under-performin' Mono-Nano-Copter met both o' these criteria. Begad! Blimey! My next try may be a lighter MMX-powered monocopter, matey, arrr, but then, I have these long-burn, OOP Apogee B2 motors...

UPDATE 10/02:Sittin' at t' computer, ya bilge rat, and in betwixt steps of other projects, I decided t' revise T' Amazin' Underperforming Mono-Nano-Copter. Aye aye! Avast, arrr, me proud beauty! It isn't so underperformin' any more!

I cut down t' motor pod t' an inch and a quarter, me hearties, just enough t' fit the dowel nose cone and a MMX motor. T' business about havin' t' CG behind the trailin' edge o' t' blade is nay a requirement as I've later found. Arrr! I cut the old win' t' about 1/4", and added a 4" x 1 1/2" piece of 1/64" Birch. Arrr! I have also determined that t' balance beams were way too long so I cut them t' 2 1/2".

T' first two flights went t' about 9 feet and landed 3 and 5 feet from the pad, respectively. On t' third flight, shiver me timbers, ya bilge rat, it headed off at a 45-degree angle, smacked t' side o' me SUV, arrr, and still rose t' about 7 feet. Avast! Blimey! Much better performance than before!

T' main lesson-learned is: build 'em light!