Standing behind the wheel of Nuova Jolly’s Prince 38΄cc is a really unique driving pleasure, which becomes even more exciting when the two brand new Mercury’s most powerful supercharged engines are hanging from its transom.
Confirming totally the opinion we got of both the Prince 38cc hull's capabilities and its excellent build quality when we first tried it two years ago - you can read the full article Nuova Jolly Prince 38΄ CC - twin 400R Verados -, I was looking forward to finding out its performance with the new 450R Verado outboards too.
Yet, before beginning recording our measurements, we started playing around with the engines’ trim and enjoying its excellent ride attempting at the same time long flights when arriving at the quite high swells’ crests.
With no doubt, one of the things someone will love most about Prince 38cc is its superb stability and ride.
Trimming excessively out the engines, we got intentionally airborne at high speeds and the deep V of its hull offered extremely soft landings with a high level of safety.
Just a light touch on the throttles was enough to make us feel the huge amount of torque of Mercury's supercharged 4.6-liter V8 outboards, which produce 40% more torque than their respective 400Rs.
Prince 38 topped out at over 60 knots with both 450Rs and we saw an improvement of more than 5 knots compared to the 400Rs.
The Rib was jumping onto plane in 2.4 seconds without raising its bow, a truly incredible figure, while reaching 30 knots in 5.3 seconds and 40 knots in 9.2 seconds.
It was capable of standing on plane at 2200 rpm and traveling at 12.5 knots, enabling us to maintain very low speeds in rough seas.
At 3000 rpm we were traveling with 25 knots burning 2.92 liters per nautical mile, while at 3500 rpm we were running at 30 knots consuming 2.86 liters per mile.
At 4000 rpm we reached 35 knots, recording the lowest fuel consumption of 2.85 liters per mile which gives the optimum range of 123 miles having 350 liters in our tank.
The above figures are very satisfying and allow us to travel at high cruise speeds with the engines running smoothly at low rpm.
At 4500 rpm Prince 38 reached 40 knots with a fuel consumption of 3 liters per mile, while at 5000 rpm we ran with great comfort at 45 knots burning 3.5 liters per mile.
You can see our detailed measurements in the table below:
In case we want to compare the above performance of Prince 38cc with the one recorded by the twin 400Rs, we will find out that 450Rs gave us 5 to 6 knots more in the whole rpm range, got the Rib on plane faster and at lower rpm, and of course achieved more than 5 knots at WOT.
It is also noteworthy that at the midrange rpm, 450Rs consumed almost the same amount of fuel with the one of 400Rs, while at 35 knots of cruise speed that was reached at lower rpm, 450Rs were burning less than the 400Rs.
Taking a care look at the measurement table, we will find out that in the particular set-up of our sea trial, the engines were obviously mounted high, leading the Revolution propellers to higher than the normal slip values across the whole rpm range.
So for our own, all-around use, we recommend mounting the engines one hole lower at the transom and reducing the propellers’ pitch by two inches. With this configuration we may lose some knots of top speed, but we will gain higher throttle response and higher cruise speeds at midrange rpm, allowing at the same time the engines to approach their maximum rpm recommended by manufacturer.
Nuova Jolly Marine
Via Bologna, 3/5 - 20060 Bussero (Milano)
Tel. 02/95334031 - Fax 02/9503235