how offten

[powerskipper]

do you open your boat up to top speed,

 

[Medskipper]

OK Then, how often do you drive your car flat out?

 

[Magnum]

My boat gets full death every time I take her out, even if just for a minute.

My car on the other hand would require a very long straight road, with no other vehicles and a complete absence of speed cameras/policemen.

 

[duncan]

change the question to 'do you run your engine up to full operating revs' and the answer will be somewhat more realistic!

 

[BrendanS]

I voted 'very rarely', which will suprise some /forums/images/graemlins/smile.gif

 

[KevB]

I'm sure I've read somewhere that Volvo recommend running at full throttle for a few mins for every hour of use?

 

[[2068]]

Oeerrr, don't think so. In the descriptions of each duty "rating", they specify what percentage of the time you CAN run at full throttle without it going bang (the duty cycle). In the case of an R1 rating, that's all the time (although some of these engines with higher ratings are exactly the same engines as the "leisure" rated engines, but with the fuel pump max setting changed: i.e. you too can pretend you have a commercially rated engine, simply by not using the top end of the throttle travel).

dv.

 

[powerskipper]

Re: how often

So what's your top speed,
When we take brig out she get anything from 35 to 39 knots flat out.

 

[KevB]

Probably another misconseption on my part but I thought it was recommended that the max cruising speed for volvo's was just 200 rpm off max? If so the other 200 isn't going to make much difference in small bursts is it?

 

[Dave_Snelson]

At 46kts, I have to have a clear run at it. She gets up to 44 without much ado, the extra 2 takes some distance and fiddling with the trim. But at that speed, it eats up distance....not to mention fuel /forums/images/graemlins/smile.gif

 

[Dave_Snelson]

In the weather that you like to go out in, I am not the least surprised you voted very rarely /forums/images/graemlins/shocked.gif

 

[[2068]]

Nope, should be fine, cos you're operating within the duty cycle. Keeps the props clean, and burns off excess fuel before landing.

disclaimer: if something was already weak (like a dodgy head gasket, or a ropy belt), then the full throttle run might be the time when you discover that existing weakness...

dv.

 

[[2068]]

The windy site says 135 Litres an hour flat out !!!