Olympic RIBs 30SR — Twin 4.2L 300hp Yamahas

30 SR RIB test by e-Ribbing

Olympic 30SR needs no special introduction.She is an original inflatable boat that runs on a hull that maintains the shipbuilding lines of our well-known racing hull of the Olympic 8.40 E2 Diamond, capable of traveling softly and safely in bad weather conditions with remarkable performance and very good ride quality, while at the same time she is characterized by her ergonomic and functional deck that ensures comfortable living at sea.

Luxurious Havens on Water

With a high level of finish and quality construction, meticulously crafted down to the last detail, 30SR is deservedly so at the top of its category, constituting a very interesting proposition for demanding marine enthusiasts. You can see the detailed presentation of her deck at the following link.

Our test Rib was equipped with two 300hp V6 Yamaha engines which were mounted on the integrated 65 cm polyester bracket and were turning the HS4 15΄΄ x 23΄΄ 4-blade stainless steel Yamaha propellers with a 1.75:1 gear ratio.
With the first touch of the controls, it was immediately apparent that we had a real rocket in our hands. The throttle response and acceleration across the entire rpm range were at a very high level, while the boat stood wonderfully in the water maintaining a very good cruising angle. Incredibly flexible and very user-friendly, this set-up is a particularly fun machine that can offer enjoyable moments.

Although our test took place in torrential rain, we finally managed to record her performance as objectively as possible.

With 250 liters of fuel and a crew of 2, the boat was standing on plane at just 1800 rpm at 9 knots, a fact that is even more important than achieving the maximum possible top speed, since it allows us to travel in plane mode at low speeds, thus improving both the quality of the ride and our autonomy in bad weather conditions.

The Rib was planning in 4 seconds, while accelerating to 30 knots in 7 seconds and reaching 40 knots in 9 seconds, data that fully certified the unique explosiveness that we constantly received during our sea trial.

At 3000 rpm, the GPS showed 27 knots with a consumption of 1.7 liters per nautical mile, which was also the most economical we recorded. At 3500 rpm we were cruising at 34 knots burning 1.9 liters per mile, while at 4000 rpm we were running at 40 knots with the fuel consumption reaching 2.1 liters per nautical mile.

At 4500 rpm we were traveling very pleasantly at 45 knots burning 2.4 liters for each nautical mile, while at 5000 rpm we were running at 50 knots and consuming 2.7 liters per mile.

At full throttle, the engines reached 6000 rpm and Olympic 30SR reached 59 knots of top speed.

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But most impressive of all were the very strong acceleration we experienced every time we pushed the controls even gently, as well as the excellent angle at which the boat traveled even at low speeds. The combination of the above with the fact that the engines easily and quickly reached their maximum rpm limit is the best proof that we had an excellent set-up in our hands.

Analyzing the numbers, we recorded in the measurement table, we will find out that the slip values ​​are at a fairly high level for this particular set-up. This in itself is food for discussion and a reason for possible future interventions.

It would really be worth it if we could run the boat by lowering the engines a hole, using the same propellers. However, I believe that at the same mounting height, we can apply three-blade 15 ½ ΄΄x 24΄΄ propellers with a high probability of not only exceeding 60 knots, but also improving consumption and cruising speed at medium rpm.