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

Construction:

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

So, what is a monocopter?

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

In chapter one, matey, "A Cue from Nature", shiver me timbers, Graham provides a very brief history o' flight, me bucko, arrr, starting, ya bilge rat, me bucko, as t' title implies, with dinosaurs, arrr, birds, plants, etc., and leadin' t' t' concept o' t' monocopter. Well, blow me down! I'm sure many of you have seen a single bladed seed spinnin' in t' wind.  T' author then presents t' history o' monocopters. Aye aye! T' first documented monocopter was built in 1953, and be powered by a model airplane engine. Ahoy! He concludes this section with some contacts for commercially available propeller-driven models. Avast! Blimey! 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, matey, arrr, 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! Ahoy! Accordin' t' Graham, ya bilge rat, t' first rocket-powered monocopter was built in 1982-83 by Korey Kline. Aye aye! These started in mid-power, me hearties, arrr, but soon staged and high power versions emerged. 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, ya bilge rat, includin' diagrams o' two of the author's designs. Earlier, shiver me timbers, I complained about t' photos. Luckily, shiver me timbers, however, the diagrams are much better.

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

T' followin' chapter discusses t' stability o' monocopters. Well, blow me down! Amid some more fuzzy math (not t' be confused with fuzzy logic :-)), 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. Avast! 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, shiver me timbers, a detailed bibliography, ya bilge rat, and t' index.

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