« Reply #1828 on: May 07, 2016, 9:27 pm »
 
We ought to have a collection of the silliest ones!!

I could share a few silly ones. Trouble is most of them were me, so for the sake of my reputation I won't bother!  That was in the days before we knew better... we have learnt a huge amount since I started hovercrafting.

Ian
Ian Brooks
Gloucester, UK

« Reply #1827 on: May 07, 2016, 8:32 pm »
 
There but for the Grace etc. .......................

« Reply #1826 on: May 07, 2016, 6:44 pm »
 
That would be Andrew Haddow and his bbv 6. Not sure if it's got a diesel trust engine.
I know he's put a
It of time and money into the craft.

« Reply #1825 on: May 06, 2016, 9:58 pm »
 

« Reply #1824 on: May 03, 2016, 10:25 pm »
 
We ought to have a collection of the silliest ones!!
In the latest Rib & Powerboat magazine There was a mention of a 'New' power-boater who on his first trip tied up in some well known harbour on the south coast and went for lunch with his wife, on returning he found the Harbour Master 'adjusting his mooring lines' which had become 'as tight as a piano wire' with the boat tipped over on its side!!! He said is there a problem? When the HM explained what had happened the guy replied ' I new the tide came in and out, but I didn't realise it went up & down as well'!!!!!!!!!!!!!!!!!!!!!!!

« Reply #1823 on: May 03, 2016, 9:15 pm »
 
Best one we have had so far was being requested to retrieve some sea kayakers who - and I quote   'didn't realise the tide went out'.  They were thigh deep in gloop about a mile from dry land.....

« Reply #1822 on: May 03, 2016, 5:07 pm »
 
As a member of the RNLI I tend to follow some of the 'Shouts' and it never ceases to amaze me the conditions these guys go out in. and also some of the stupid things the 'public' get up to and have to be rescued. I remember one day whilst walking on Black Rock sands and seeing (Through Binoculars) this powerboat going back and forth across the entrance to the Porthmadog channel near No 1 buoy (There are 17 in all!!) a short time later the RNLI inshore boat turns up to guide them in, but by this time the channel is too shallow for the powerboat so they take them back to Criccieth to anchor!! Later the report stated Turned out to powerboat 'Lost' off Porthmadog bar!!!!! What a waste of RNLI time and money!

gavinparson

« Reply #1821 on: May 03, 2016, 2:37 pm »
 
I get sent a copy of the Sheerness lifeboat callout reports. It amazes me the distances that lifeboat travels to do a rescue that could really be done with a nearby vessel.
In March, it travelled around 15 miles from Sheerness to Strood to rescue some guys stuck on the Russian submarine which is about 100 yards from shore.
You'd think there would be someone nearer who could have helped.
On another callout, a coastguard helicopter came all the way from Lydd to search for a missing person. Hardly a local service is it?

« Reply #1820 on: Apr 28, 2016, 6:45 am »
 
But the bottom of the piston is marked as a gas spring chamber.
this is what returns the piston to the top and so cannot be pressurising
the air intake !

« Reply #1819 on: Apr 27, 2016, 10:38 pm »
 
It's a 2-stroke - no suction cycle.  Although not clear, it looks like it uses "crankcase" pressure to push intake air into the cylinder via ports (the use of exhaust valves allows full control over scavenging unlike "normal" 2-strokes).  The proximity of coils, etc. to a very hot combustion chamber/piston must be a bit of an engineering challenge!

« Reply #1818 on: Apr 27, 2016, 9:56 pm »
 
Why do U need to pressurise the air inlet?

« Reply #1817 on: Apr 25, 2016, 2:18 pm »
 
So what is pressurising the air inlet ??

« Reply #1816 on: Apr 25, 2016, 1:19 pm »
 
The future is electric? Free-piston engine/generator + electric motors??

« Reply #1815 on: Apr 25, 2016, 7:05 am »
 
1904 3115cc 16Hp

But you'ld rather have one of these wouldn't you ???



gavinparson

« Reply #1814 on: Apr 25, 2016, 5:49 am »
 
You can get 200hp from a 1 litre, 3 cylinder Ford Ecoboost engine. From the car it's 125hp. Let's not forget that's the same displacement as a 35hp Briggs.
I know it's a lot more complicated though. one day I'll have a play with one when I have the time and money.