| Barry
My philosophy is to save weight wherever possible, but not to compromise strength; I’d rather have a heavy model in one piece than a super light model in a bin bag! I’ve used “core an half ribs”, with holes, on several models and haven’t had a structural failure yet; I hope that’s not going to be a case of “famous last words”.
As for “metal to metal contact” that’s really a misnomer, it’s when metal to metal make and break contact that problems arise. Wheel collets firmly attached to the undercarriage leg cause no problem, but if the grub screws work loose and vibration causes intermittent contact then radio interference could well be the result. If a design calls for say 2 pieces of metal to slide over each other, which might cause problems, one way to over come it is to join the 2 pieces together with a flexible wire that allows the individual movement but ensures there is always electrical contact. |