Twin tail design (ercoupe, etc.)

[Patrick]

I am looking for design criteria for twin tails vs. conventional. For
instance, what is the usual ratio of area for twin vertical fins vs. a
single one--1:1?

If anyone knows this ratio for the Ercoupe early models vs the M-10,
that might be helpful.

Any old aeronautical design books deal with this?

Thanks!

[Graverobber]

Kinda doubt the 1:1. look at the difference between the B-24 and PB4Y.
"Patrick" > wrote in message
oups.com...
>I am looking for design criteria for twin tails vs. conventional. For
> instance, what is the usual ratio of area for twin vertical fins vs. a
> single one--1:1?
>
> If anyone knows this ratio for the Ercoupe early models vs the M-10,
> that might be helpful.
>
> Any old aeronautical design books deal with this?
>
> Thanks!
>