Cliff Barker fas the following information on his site :-
TRACK BALLASTING: -
Ballast can be loose laid if required but the birds tend to flick it everywhere and it can get under the sleepers causing uneven track. Full size track ballast was 1?? to dust; the exact scale therefore should be 1.2 mm to dust. My track ballast is 3mm to dust, so you will need to put this through a Sieve or Kitchen Calendar.
This has made me realise that G1 model ballast is smaller than I first thought.
John.
TRACK BALLASTING: -
Ballast can be loose laid if required but the birds tend to flick it everywhere and it can get under the sleepers causing uneven track. Full size track ballast was 1?? to dust; the exact scale therefore should be 1.2 mm to dust. My track ballast is 3mm to dust, so you will need to put this through a Sieve or Kitchen Calendar.
This has made me realise that G1 model ballast is smaller than I first thought.
John.