Article about twin-boom aircraft

[Brian da Basher]

Well, Tophe, I don't own a copy of the rule book, but this particular twin-tail broke the record for the longest, non-stop manned flight. I think to hold this record, the flight must take place within earth's atmosphere.

I don't know if the Guiness Book folks have seperate categories for unmanned flights and orbital manned and unmanned flights, but it's a question worth asking.

Vive le twin tail!

Brian da Basher

[Tophe]

Other definition puzzles: are these twin-fuselage to be classified as twin-tail-boom or flying-wing?

[Deltafan]

...
* There was a link to http://www.airandspacemagazine.com/asm/mag.../DJ05/twbm.html with the unknown prototype below. Does anyone know it ? Great discovery!
Thanks.

Hi !

Maybe it was already found... I try :

It's a Charles Rochevilles EMSCO "Pacific Flyer" (in WINGS, page 15, february 2000)

It's a transpacific pionneer. It has a 60 feet wing which carried 800 of it's 875 gallon fuel capacity. Built in 1930. All metal. The stock market crash ruined the EMSCO company and ended the Pacific Flyer career. The plane was sold for scrap in november 1930.


Regards
Deltafan

[Tophe]

I had made the identification (thanks to Lark), yes, but thank you for all these extra details that I did not know.

[Tophe]

According to http://www.editions-eyrolles.com/Dico-BTP/...3cdc84eea0d5418 the French word for twin-boom is mainly related to bridges structure, not aircraft.

Anyway, the French word for "bridge" ("pont") is the same word as the one for "deck" in ship & aircraft ("pont" – the A380 being a "2-ponts" like the Bréguet 760/765). Somehow, a twin-fuselage airliner would be a double-deck, side-by-side, so twin-boom...  [while a P-38 or J 21, single-deck or zero-deck, would not be twin-boom   ]

[Tophe]

Puzzle for the crazy twin-boom taxonomist (that I am): is this a twin-fuselage layout or a twin-boom layout?
My answer: this is a twin-tail-tube anyway, or a twin-pod&boom...

(thanks to http://www.wingsoverkansas.com/photos/dmur.../XL15flight.jpg )

[Tophe]

And how to classify these flying wings (P-38 No Tail and P-38 Half Tail), with two booms but no actual tail thus no tail-booms...

[Tophe]

Other puzzle: P-38NFW Not Flying Wing (left) is a twin-tail-boom, and P-38AFW Actual Flying Wing (bottom) has no tail-boom because the fins are hold by the wing. But what about the ones in between like P-38HFW Half Flying Wing?

[Tophe]

Here is another puzzle for the French word meaning twin-boom ("bipoutre" = "two-boom"): how to classify this canard J2F-9 Duck (in French the word Canard means Duck... so this would be a Duck-Duck...) of "1943"?

(Thanks to http://www.fortunecity.com/marina/manatee/...e/272/duck.html )

[Tophe]

At http://www.secretprojects.co.uk/forum/inde...hp?topic=887.30 , Boxkite presented the PZL Condor as twin-boom while I count it as triplex-boom.
Discussing with Boxkite/Thomas, that produced 2 new possible definitions for the word "twin-boom":
Boxkite1: aircraft with one (of its) tail(s) hold by 2 booms
Boxkite2: aircraft with rear-tail hold by 2 booms
[mine (FF): aircraft with 2 booms holding the stabiliser(s) or fin (s)]
Here are the basic similarities/differences:

[Tophe]

And here are cases to complete all combinations:

[Tophe]

I know, I know: it is a big problem to decide if twin-fuselage is a case of twin-boom or not... I have the answer now: from the Commonwealth archives appeared the CA-1212 Twin-Boomerang of 1945.
See? Twin-Boom-erang, while twin-fuselage, twin-plane, Zwilling and all...

[Tophe]

I have found 2 new (French) similar definitions for the word "twin-boom":

I translate here:
- (according to TV5Monde): "that has 2 booms put in parallel"
- (according to Alexandria/Memodata): "that includes 2 parallel hold booms"

I disagree about:
- the parallel requirement and limitation
- the absence of tail relation
- the unclear wording "has" or "includes": either 3 booms Yes (includes 2), or else 3 booms No (not equals 2).

[Tophe]

Boxkite told me of a tandew wing plane with twin booms (Typhon-2), asking if I would classify it as triplex-boomer like the canard similar layout or as actual twin-boomer...
Well, I think of three definitions, for TWIN-BOOM:
I (mine, now) aircraft with 2 booms holding the tail(s)
II (possible) aircraft with 2 booms linking the lifting areas
III (mine, old) aircraft with 2 booms as frame for a (single) piece of sky
First, here are the combinations with Yes for I:

[Tophe]

Then the combinations (still having tandem wings or tandem tails) with No for I: