Does anyone know what the real reason is for them running most of the coasters on one train when the park's busy? It might save some money on ride staff, for example The Swarm doesn't need the baggage kiosk open when there's only one train, but I can't see a significant reduction in the cost of ride staff. Not enough to justify the negative impact on guest experience.
I don't think any of the coasters need a minimum number of guests to stop them stalling, which is why Chessington sometimes runs Vampire on one train when there's a queue. In Vampire's case the train can stall before the second lift with a light train and depending on other factors such as weather. Because it's quite an old ride taking a train off is quite a lot of work and time consuming (they have to be winched backwards onto the transfer track). For this reason there might be a queue in the middle of the day, particularly if a lot of schools group are in, but if they thought it would empty out and be quiet later on in the day they'd leave it on one train. But I don't think that's applicable to the coasters at Thorpe Park?
There would be some savings on electricity, but pretty slight. There would also be some savings on wear and tear, for example I think Stealth's launch cable needs replacing after a certain number of launches. It could also be a ploy to sell more Fast Tracks.
Perhaps it's a combination of cutting down on ride staff, saving electricity, wear and selling more Fast Tracks? But if these are the reasons it does seem petty. I understand that they're a business, but it just doesn't seem worth it. They must have spent a fortune on rides such as The Swarm and Derren Brown's, and yet you visit and it feels like a park that's run on a shoe string. Is there some other key factor that I'm missing here?
P.s. it might be that parks get aggressive targets to cut costs, but more freedom to decide on how they do it? Alton Towers has closed quite a few rides recently (Charlie, Sub Terra, Ripsaw etc). Thorpe has also closed rides such as Slammer, but it's possible that Towers have been more aggressive at cutting in other areas? It's hard to know what goes on in the offices at these parks and why certain decisions are made. With the exception of Icon Thorpe and Alton have invested on a level that's been unrivaled in the UK for a long time. But when you take away big capital investments (which are impressive) it's hard to see how much more potential there is for Thorpe Park to improve their profits either by jacking up prices and upselling more, or by cutting their costs.