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

Construction:

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

So, ya bilge rat, arrr, what is a monocopter?

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

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

From there, 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. Ahoy! Accordin' t' Graham, t' first rocket-powered monocopter be built in 1982-83 by Korey Kline. Aye aye! These started in mid-power, but soon staged and high power versions emerged. Begad! For a short time, they were even produced commercially by ACE rockets - now that's an OOP kit I'd like! This chapter includes over twenty diagrams and photos, includin' diagrams o' two of the author's designs. Well, blow me down! Ahoy! Earlier, arrr, I complained about t' photos. Arrr! Luckily, however, the diagrams are much better.

T' next chapter covers t' physics o' t' monocopter, shiver me timbers, and presents a set of design equations. Avast, me proud beauty! Blimey! For a monocopter t' fly properly, you have t' balance the forces on t' rocket in all three axes. Arrr! Blimey! Ya scallywag! Blimey! T' derivation o' some o' these equations is OK, matey, but t' author makes some large jumps. Well, blow me down! Blimey! I personally haven't been able t' convince myself that thar aren't errors in this section. Arrr! Blimey! Avast! Blimey! 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, me hearties, me bucko, arrr, and t' rules o' thumb t' author provides, matey, is all one can expect out o' these equations anyway. Despite my criticisms, I still found section interesting.

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

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