RE: Which 4 Stroke for a Bridi Tigercat?
Randy:
It is a well-kept secret that Saito is alloying aluminum with unobtanium.
Since unobtanium has a negative mass, the weight of the alloyed parts can be as light as Saito wants them to be. For ease in handling they found that weight less than an ounce or two made working with the parts too difficult - they tended to blow away in a light breeze. Additionally, since unobtanium will not alloy with ferrous metals, they could not lighten the iron and steel parts, effectively limiting the maximum weight reduction available to the engineers.
I hope this information is of interest to you.
Bill.
PS: (Tongue firmly in cheek) Haw. wr.