Merry Christmas everyone.
I got a Hornby Class 31 as a surprise for Xmas (31 174). I'd like to make a couple of comments about it.
I know it's been said many times recently about the way the bogie and wheels are set up for negotiating curves etc.
On the particular example I have, I notice that this lateral movement of the outer axles on the No. 2 Bogie is quite marked. ie. the 'A' part of the AIA-AIA arrangement.
This is to the point that, on No. 2 Bogie, this lateral movement allows the wheels to rotate quite freely, because the axle gear is disengaging from the drive-gear inside.
It is quite easy to see the reason for this. It's mainly because of the ends of the bogie side frames are not rigidly connected together. ie. they can flex outwards away from each other, allowing the outer axles on the Bogie to move more than they should be allowed to, and hence disengage from the gear-train inside the bogie.
Any comments welcome.
Best Regards
Scooter
I got a Hornby Class 31 as a surprise for Xmas (31 174). I'd like to make a couple of comments about it.
I know it's been said many times recently about the way the bogie and wheels are set up for negotiating curves etc.
On the particular example I have, I notice that this lateral movement of the outer axles on the No. 2 Bogie is quite marked. ie. the 'A' part of the AIA-AIA arrangement.
This is to the point that, on No. 2 Bogie, this lateral movement allows the wheels to rotate quite freely, because the axle gear is disengaging from the drive-gear inside.
It is quite easy to see the reason for this. It's mainly because of the ends of the bogie side frames are not rigidly connected together. ie. they can flex outwards away from each other, allowing the outer axles on the Bogie to move more than they should be allowed to, and hence disengage from the gear-train inside the bogie.
Any comments welcome.
Best Regards
Scooter