1956 Douglas Dragonfly. Unique flat four engine .... like two BMW motorcycle engines stacked together! - ThreadSky

polyculeofone.bsky.social • 89 days ago

1956 Douglas Dragonfly.

Unique flat four engine .... like two BMW motorcycle engines stacked together!

Comments

I thought that was an oddball, never heard of a 4 from Douglas, particularly one with a disc and alloys which I thought were XS250 Yam. See this: https://www.douglasmotorcycles.net/index.php?topic=2608.0

polyculeofone.bsky.social•89 days ago

*shrug*

I just go by what Google Images tells me.

No one likes a busybody, JRM. 🙄

captainsidecar.bsky.social•89 days ago

Or, more accurately, 2 Douglas engines stacked together, given that Dougie's history with flat twins was at least as long as BMW's at the time.

polyculeofone.bsky.social•88 days ago

There's always a reply guy. 😂

tigerrider.bsky.social•88 days ago

I would love to see the internal working configuration. Wow.

polyculeofone.bsky.social•88 days ago

Definitely. Maybe it's like an old Porsche flat four, turned 90º?

tigerrider.bsky.social•88 days ago

That would put the crank ends being up and down, vertical? Then transfer to the trans and rear wheel? Trans on top or bottom or ? It's a bit confusing.

polyculeofone.bsky.social•88 days ago

The only thing the builder had to say about it was "It is basically a Dragonfly with a four cylinder engine produced by welding together 2 Mark series engines and connecting the cranks with a toothed belt drive."

Couldn't find any schematics for the build.

uppityblackwoman.bsky.social•89 days ago

Here you go again!

Nice!!!

timsbiker.bsky.social•89 days ago

Its a beautiful combination of old and new with some clever engineering. Pretty cool construction me thinks.

polyculeofone.bsky.social•89 days ago

I know those rims and brakes aren't 1956 but the frame certainly is. Opinions vary on the engine.

timsbiker.bsky.social•89 days ago

Mate, anyone that can do the mods as seen and if it runs reliably, then I think it's bloody cool. For me being unique is important.....unfortunately I can't afford to be that unique

timsbiker.bsky.social•89 days ago

Oh, from your name I assume you are Borg?

polyculeofone.bsky.social•89 days ago

It's witty but obscure absurdist humor.

So obscure only two people have gotten it and laughed so far. 😂

timsbiker.bsky.social•89 days ago

cool, are you a red dwarf'er as well?

muddyyuma.bsky.social•88 days ago

That thing looks heavy!

tscheumann.bsky.social•89 days ago

Love that

Comments

Posting Rules

Reply