Brief:
"Monocopters", ya bilge rat, by Francis G. Ahoy! Graham, provides a brief history o' "single-winged, powered vehicles". Ahoy! Well, blow me down! It is 70 pages long, ya bilge rat, matey, includin' t' index. Graham, for you rocket history types, was one o' t' foundin' members o' what is now the Tripoli Rocketry Association (circa 1964). He is now a physics professor at Kent State. Arrr! This book is available from Apogee here. 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). Blimey! Avast! It is bound with cloth tape. T' quality o' t' printin' is poor with the most o' t' photos bein' largely unintelligible, arrr, and several pages were printed out o' sequence.

So, matey, what is a monocopter?

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

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

From there, 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. Accordin' t' Graham, matey, t' first rocket-powered monocopter be built in 1982-83 by Korey Kline. Ya scallywag! Blimey! Blimey! These started in mid-power, but soon staged and high power versions emerged. Begad! 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! This chapter includes over twenty diagrams and photos, includin' diagrams o' two of the author's designs. Blimey! Arrr! Blimey! Earlier, I complained about t' photos. Aye aye! Blimey! Luckily, however, the diagrams are much better.

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

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

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

Summary:
In summary, I thoroughly enjoyed this book. Begad! Avast, me proud beauty! It be fun and interestin' reading, even though t' photos are poor, ya bilge rat, and is well worth t' $10 price tag. Ya scallywag! The material included some technical stuff (equations, me bucko, math, matey, ya bilge rat, etc.) but the presentation be nay rigorous or thorough. Begad! Yet, enough design tips were provided for me t' build me first model. Arrr! 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