--- In [email protected], [EMAIL PROTECTED] wrote:
It's true that you're unlikely to damage a gate by pushing gently.
But I'm surprised that you can push a gate open against a head as
great as 6 to 8 inches. A back-of-fag-packet (except that I don't
smoke) calculation suggests that on a typical narrow lock this would
take between a ton and a ton and a third of force.
>
> A quick look on Google suggests that a typical commercial tug
manages about 1 ton push (or pull) for every 80hp of engine power.
And that's a modern craft specifically designed for that purpose.
>
> Are my sums wrong (quite possible - it's a long time since I did A-
level maths amd physics!) or is your boat capable of a surpisingly
hard push? (maybe because of being steam-powered?)
>
> Martin L
>
Its possable that 6/8inches is a slight over exageration, and it
maybe closer to 4/6inches.
- However our boat is capable of exerting considerably more push
than a more mainstream narrowboat due to its large propeller (26inch
diameter).
- Also although the engine is only rated at around the 20IHP area,
steam engine are most powerfull from stationary and can produce a
fairly scary amount of push for there size.
Daniel
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