Answers inline:
--- "richardsachs@juno.com" <richardsachs@juno.com> wrote: > what is a twin-plate crown? If you also know theproper definition of "bi-laminated" frame construction, this one should be simple.
> is it a crown that's made of two seperate pieces > and brazed all-at-once? Definitely.
> is it a crown that has a decorative groove in it, Definitely not.
> or a groove that allows back to be seen through > the front? Not if you need a mirror to complete the effect.
> is it a crown that has a B.H.H.* on either side of > the steerer? Stricly speaking, I think that would be considered to be a "faux fourchettes des deux plateaux" or something similar. Have you seen the forks that LeJeune used on their tandems? Those were true twin plate fork crowns - and I mean that literally. They took two pieces of steel plate and drilled a B.H.H. ("big honking hole") through each one. The steerer tube went through each of the honking holes. The ends of the plates are contoured to fit the fork blades. The whole collection of plates and tubes are brazed together to create an extremely strong fork. Of course (as Jan Heine's comments caused me to recall) this assembly used an oversized steerer tube - something like 28mm. (The inside diameter was either 22.2mm or 22mm, depending on the weather in Saint Etienne on the day of manufacture.)
When I finally get all my LeJeune stuff decently photographed, I'll post a photo to the list. Best regards, Fred Rednor - Arlington, Virginia
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