Do you mean an ordinary point at the entrance to a balloon/reverse loop with 4 foot radius on the curve, or a curved point where the tightest radii is 4 feet?
Do you mean an ordinary point at the entrance to a balloon/reverse loop with 4 foot radius on the curve, or a curved point where the tightest radii is 4 feet?
Ah yes, quite right, missed that. The question is are they looking for 4ft radius (8ft diameter) for the inner or outer curve? The Piko curved switch is R2/R3. Trainline make some that are R3/R5.
Ah yes, quite right, missed that. The question is are they looking for 4ft radius (8ft diameter) for the inner or outer curve? The Piko curved switch is R2/R3. Trainline make some that are R3/R5.
As so often I am confused. I've seen it stated elsewhere that Piko R3 = LGB R2 as stated by Diesel2000 above. However the LGB geometry chart states that LGB r" is 1560mm diameter = 780 mm radius. Piko's chart says their R3 is 921mm radius.
Could someone with a more geometrical brain than mine clarify the position?
Reason for asking is that I need a point to branch off a LGB R2 curve (so inner radius LGB R2) and have been hesitating over the cost of the Bertram Heyn solution at over EUR 200 ready made. I don't have the skills to assemble the kit.
As so often I am confused. I've seen it stated elsewhere that Piko R3 = LGB R2 as stated by Diesel2000 above. However the LGB geometry chart states that LGB r" is 1560mm diameter = 780 mm radius. Piko's chart says their R3 is 921mm radius.
Could someone with a more geometrical brain than mine clarify the position?
Reason for asking is that I need a point to branch off a LGB R2 curve (so inner radius LGB R2) and have been hesitating over the cost of the Bertram Heyn solution at over EUR 200 ready made. I don't have the skills to assemble the kit.
Thanks for clarifying. Struggling to find Trainline R2. May have to bite the bullet and go for Heyn. Will talk to GRS first as they seem to offer an LGB R2 equivalent.
The "R" numbers in themselves are pretty meaningless, as each manufacturer has a different series of radii. In G scale all seem to use LGB R1 as their own R1... but after that all bets are off.
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