I was wondering if anyone had some advice on Hornby switches. We have our track layed and pinned down and all was fine, but our Bachmann 00 Turbostar 2 car DMU (Southwest) derails on the frog.(low speed fine but faster has the problems and always when someone has come round to to look at the layoutsigh) Some sites fly the flag for Peco switches. Now is the time to fix this before the balast is layed. Any thoughts?
Hornby switches are fairly generous in their allowances, check in the frog area and check rails to see if the wheels drop into the gaps, very small pieces of plasticard or brass may be needed to fill the gaps, the Chatham club in England recently refurbished the old Hornby demo layout and had problems with finer scale wheeled stock over two diamond crossings and resorted to replacing them prior to the show. Peco points tend to be better, the depth of your wheel flanges might be a reason for considering code 100 as opposed to code 70 (fine scale) as you could reverse the problem (Bachmann and newer Hornby run fine, older Hornby and Lima types will bump over the chairs)
If it only pops off the track at higher speeds it does sound like the flange hitting the crossing vee.
Best suggestion is to get right down next to the offending point and use the mark one eyeball (or if you are really technical try with a video camera and watch it in slow motion on TV.
Thank you glenn_rhb. As our DCC layout will be a modern themed one and we are running 2 Turbostars and a modern Hornby shunter we will investigate code 100. Many thanks for your imput. 
[:)]
Hi,
The design and radius of the points could be the problem. Peco Streamline small radius switches are 24" radius which I use because of limited space and have had no de-railing problems with anything.
Geoff Walker, Windsor, UK.
Back in the 60s, we had problems with Tri-Ang switches (as they were then) and NMRA standard wheels. The guard rail would allow the wheel flange to run down the wrong side of the V in the frog. My friend “solved” that by carving bits off the V. (These were series 3 points.)
Considering the wide flanges and narrow gauge that Train and Hornby used to have, if the switches accomodate the old stock, the modern stuff will probably misbehave.