Brief:
"Monocopters", matey, me bucko, by Francis G. Avast, me proud beauty! Graham, arrr, provides a brief history o' "single-winged, matey, powered vehicles". Arrr! It is 70 pages long, ya bilge rat, shiver me timbers, includin' t' index. Arrr! Graham, for you rocket history types, was one o' t' foundin' members o' what is now the Tripoli Rocketry Association (circa 1964). Avast, me proud beauty! Aye aye! He is now a physics professor at Kent State. This book is available from Apogee here. Well, blow me down! I bought my copy from Apogee about a year ago, so this review will describe t' 1st Edition.

Construction:

T' book is informally published in a 5.5" x 8.5" format (height x width). Begad! Ya scallywag! It is bound with cloth tape. Avast, me proud beauty! T' quality o' t' printin' is poor with the most o' t' photos bein' largely unintelligible, arrr, me bucko, and several pages were printed out o' sequence.

So, what is a monocopter?

Monocopters are basically single-bladed helicopters. Avast, shiver me timbers, me proud beauty! T' engine, matey, whether an airplane engine or rocket motor, ya bilge rat, both drives and counteracts t' lift forces produced by t' single blade. Begad! This delicate balancin' act, matey, if orchestrated properly, matey, causes t' monocopter t' rise into t' air, shiver me timbers, usually with a satisfying, "whump, shiver me timbers, arrr, whump, me hearties, whump...". Begad! Ya scallywag! They are fascinating contraptions and are usually one o' t' highlights o' any launch. Avast, me proud beauty! Begad! I have been fortunate enough t' witness a high-power monocopter launch - it was one o' the coolest flights I've ever seen. Ya scallywag! Blimey! T' attached photo is me first monocopter, me hearties, the "T' Amazin' Underperformin' Mono-Nano-Copter". Avast, me proud beauty! Functionally, this not an great example, but it is fairly typical physically. Avast! A separate review of this rocket is forthcoming.

In chapter one, "A Cue from Nature", matey, Graham provides a very brief history o' flight, starting, as t' title implies, with dinosaurs, shiver me timbers, birds, plants, etc., and leadin' t' t' concept o' t' monocopter. Well, blow me down! Ahoy! Blimey! I'm sure many of you have seen a single bladed seed spinnin' in t' wind.  T' author then presents t' history o' monocopters. Blimey! Begad! Blimey! T' first documented monocopter was built in 1953, and was powered by a model airplane engine. He concludes this section with some contacts for commercially available propeller-driven models. In the next brief chapter, shiver me timbers, he talks about t' monocopter's role in sci-fi. Anyone remember them in t' Gerry Anderson series "Stingray"?

From there, arrr, matey, he moves on t' describe t' development o' t' rocket-powered monocopter, whose history starts in t' early 70's with rocket-powered "helicopter" models. Well, blow me down! Blimey! Accordin' t' Graham, ya bilge rat, t' first rocket-powered monocopter was built in 1982-83 by Korey Kline. Ahoy! Blimey! Blimey! Blimey! These started in mid-power, but soon staged and high power versions emerged. Aye aye! Blimey! For a short time, me bucko, they were even produced commercially by ACE rockets - now that's an OOP kit I'd like! Blimey! Blimey! Blimey! This chapter includes over twenty diagrams and photos, includin' diagrams o' two of the author's designs. Earlier, I complained about t' photos. Aye aye! Blimey! Blimey! Blimey! Luckily, however, the diagrams are much better.

T' next chapter covers t' physics o' t' monocopter, ya bilge rat, matey, and presents a set of design equations. For a monocopter t' fly properly, you have t' balance the forces on t' rocket in all three axes. Ya scallywag! Blimey! T' derivation o' some o' these equations is OK, me bucko, but t' author makes some large jumps. Avast! Ya scallywag! I personally haven't been able t' convince myself that thar aren't errors in this section. Maybe other readers have done so and can respond t' this review.  However, there are so many variables t' deal with that it is possible that a general understandin' o' t' forces involved, and t' rules o' thumb t' author provides, matey, shiver me timbers, is all one can expect out o' these equations anyway. Begad! Blimey! Despite my criticisms, I still found section interesting.

T' followin' chapter discusses t' stability o' monocopters. Ya scallywag! Amid some more fuzzy math (not t' be confused with fuzzy logic :-)), he presents several techniques t' stabilize your monocopter, me hearties, arrr, t' most common o' which seems t' be a double-weighted balance beam perpendicular t' t' wing's axis (e.g. t' thin rods seen in me photo).

T' remainin' material includes a description o' Graham's personal experiments, musings about t' feasibility o' manned monocopters, ya bilge rat, a detailed bibliography, shiver me timbers, and t' index.

Summary:
In summary, ya bilge rat, I thoroughly enjoyed this book. Avast! It was fun and interestin' reading, even though t' photos are poor, shiver me timbers, and is well worth t' $10 price tag. Arrr! The material included some technical stuff (equations, math, arrr, etc.) but the presentation was nay rigorous or thorough. Aye aye! Yet, enough design tips were provided for me t' build me first model. Blimey! My suggestions for t' next edition include better print quality and some examples o' how t' utilize t' equations.

Overall Rating: 4 out o' 5