bordercollie
Member
- Location
- Australia
Hi
After reading many threads etc. I am still not sure which is the most probable "V" crossing to use on a P4, GWR plan using old curved switches. Smith in his book says that "straight over straight" was standard unless otherwise specified. This I take to mean special rare situations. Also I am not totally sure what "Straight over straight" means. Does it mean the the knuckle rails and wing rails were straight either side of the knuckle? If this is the case then I think regular is required. However, the section in the Template companion says that generic is used for exact gauges such as P4 and P7. At first I didn't think it would make any practical difference but changing from generic to regular does shorten the template by a bit. At the end of the day I don't think it would be noticible but I would like to get it as correct as possible at the design stage.
Thanks
Graham
After reading many threads etc. I am still not sure which is the most probable "V" crossing to use on a P4, GWR plan using old curved switches. Smith in his book says that "straight over straight" was standard unless otherwise specified. This I take to mean special rare situations. Also I am not totally sure what "Straight over straight" means. Does it mean the the knuckle rails and wing rails were straight either side of the knuckle? If this is the case then I think regular is required. However, the section in the Template companion says that generic is used for exact gauges such as P4 and P7. At first I didn't think it would make any practical difference but changing from generic to regular does shorten the template by a bit. At the end of the day I don't think it would be noticible but I would like to get it as correct as possible at the design stage.
Thanks
Graham
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