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?
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.)
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!)
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!
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!
)
