placing optimax

niels · 16 January 2002, 13:53

hi guys

does any one know the best way to place my 200hp optimax
behind my revenger 7,00mtr.
hight place etc.
and does somebody know a good system to make your own
sunbed(???)?
Is somebody coming to the Netherlands coming season?

greetings Niels
(!!!what a poor english!!!)sorry!

jools · 16 January 2002, 13:58

In the middle ????

Sorry - couldn't help myself!

Powerboat · 16 January 2002, 14:21

and prop side down !

jools · 16 January 2002, 15:27

There is a cruise planned for holland later in the year

See the main www.rib.net pages

at

www.rib.net/holland2002.htm

for the full story

(Keith you could go as a foot passenger on the ferry and take your SIB as hand baggage

)

Alan Priddy · 16 January 2002, 16:29

You lot are so stupid!!! everybody knows that the engine goes on the back of the boat!!!!

matiboy · 16 January 2002, 19:32

isnt that the pointed end ?

Keith Hart · 16 January 2002, 19:53

Hey Jools,

(Keith you could go as a foot passenger on the ferry and take your SIB as hand baggage )

You may jest, but think of the money I would save on ferry costs by not having a trailer behind to pay for!

Regards

Keith (pack it in a bag) Hart

niels · 18 January 2002, 09:39

funny guys

I see that you didn´t understand my question.
but don´t worry I find it out myself.
greetings from silly holland

niels · 18 January 2002, 13:52

and try to write something in dutch see if it works.

Pat Willan · 18 January 2002, 14:07

Jokes aside -- I have just measured up the position of my 200HP Optimax XL on a 6.5m Tornado. The engine was fiited by the boat manufacturer. It is located as follows:

Offset from centre line to starboard is surprisingly small at only 20mm; and

height of anti cavitation plate above the bottom of the keel is around 75mm. (I believe that the transom mounting height is subject to other considerations though.)

Hope that this helps.

Pat.

John Kennett · 18 January 2002, 14:24

That must be quite a speedy set up!

It sounds like the engine is mounted quite high -- are you happy with the results?

John

Pat Willan · 18 January 2002, 16:24

John

Thanks for the observation - I hadn't realised that this was a particularly high mounting.

The rigging of the Optimax in this manner seems to keep the Tornado very stable at speed, although my experience of other boat/engine combinations is limited. In calm water she can achieve 50kt. (but only for short bursts - because my nerve gives out and the fuel consumption rate is horrendous!)

Pat.

John Kennett · 18 January 2002, 17:40

The general rule of thumb for general use is for the cavitation plate to be in line with the bottom of the transom.

In high performance boats it is often raised to decrease drag, but this can cause problems with prop ventilation when pulling away or in hard turns -- hence my enquiry!

John

niels · 19 January 2002, 12:49

this helps!!

Pat Willan · 19 January 2002, 15:54

Oops ...... it would help if I had measured the height correctly. I measured to the forward (and higher plate). The dimension from the main cavitation plate to the bottom of the transom is more like 10mm. My abject apologies for this mistake which would have gone unnoticed had it not been for John's sharp eyes.

The lateral offset is as before - I double checked it!

Pat.

John Kennett · 19 January 2002, 21:30

That sounds more like it!

John