Storebro Royal Cruiser 31 Adriatic/Biscay/Baltic
Storebro Royal Cruiser 31 Adriatic
Storebro Royal Cruiser 31 Biscay
Storebro Royal Cruiser 31 Baltic
|Year of production||1975-1991|
|Height above waterline (m)||2.65|
3.50 - Biscay
|Freeboard front (m)||1.20|
|Freeboard aft (m)||1.05|
|Displacement (t)||4 - 6|
|Fuel (l)||2 x 325|
|Water (l)||2 x 140|
|Number of boats||475|
The Storebro Royal Cruiser 31 was the smaller sister of the successful Royal Cruiser 34. At the same width it was about one meter shorter.
With the Storebro Royal Cruiser 31, the three variants Adriatic, Biscay and Baltic were offered for the first time.
The original concept of the Storebro Royal Cruiser 31 only included the variants Adriatic and Biscay. Both versions based on the same deck shell. For the Mediterranean in particular boats with Biscay-hardtop but without sliding-door were built. Some customers also upgraded their Adriatic by using the Biscay-hardtop.
The boat was completely made of GRP, apart from the mahogany made hardtop. On first boats the wooden parts were painted in the color of the gelcoat. Due to the feedback from the customers, the wood was clearly varnished in typical Storebro manner later.
For the Storebro Royal Cruiser 31, essentially the same motors were used as for the somewhat larger Storebro Royal Cruiser 34. So at the beginning, Volvo Penta MD32, Perkins and Chrysler engines were used. Due to strikes in England, the supply of Perkins engines was almost impossible. At this time, Volvo Penta launched the TAMD60A with 192 hp on the market. The TAMD60x series then replaced the Perkins engines.
The originally offered Volvo Penta MD32 were only offered with left turning propellers. It was different with the Perkins engines. Here in each case a left and a right-turning engine was installed. The right turning engines were marked by an additional "X" in the serial number (e.g. 354UX...). Later installed Volvo engines had suitable transmissions for left or right hand rotation.
By default the Storebro Royal Cruiser 31 was delivered with two engines and shaft drive. However, a few boats were also equipped with single engine and shaft drive.
Seven ships were equipped with sterndrive. Five of them received the Volvo Penta AQD40A with 124 hp. The engines were then coupled with 250 or 280 singleprop drives. 1983 a 31er with two Volvo Penta AQ200D V8 engines and 280-drive was delivered. Last ship was then 1983 a ship with two AQAD30 engines and the new DuoProp drive.
Obviously, there are two layout options:
The new hull only brought advantages for the high-powered boats. However, the behavior of the hull in the sea became somewhat harder for all engines. The original hull allowed a softer ride.
Licensed boat building
After the start of cooperation with Libya to build up local water sports 15 Royal Cruiser 31 were delivered from Sweden. 65 Royal Cruiser 31 were built later in Libya under production license. These ships were intended exclusively for the Libyan market.
|No. of cylinders||8||6||6||6||6||6||6||8|
|Engine output (kw/(HP))||136/(185)||71 - 83/|
(97 - 113)
|129/(175)||78/(106)||89 - 147/|
(121 - 200)
|67 - 91/|
(91 - 124)
|67 - 91/|
(91 - 124)
|No. of cylinders||8||6||6||6||4||6||6||4|
|Engine output (kw/(HP))||147/(200)||103 - 169/|
(140 - 230)
|81 - 109/|
(110 - 148)
|121/(165)||81/(110)||112 - 184/|
(152 - 250)
Volvo-data was taken from the Volvo Penta engine-database
* All variants of this engine
The values given in the motor diagrams below are measured values of individually equipped ships. The measured values can vary depending on the equipment as well as the wind and temperature conditions. These values do not indicate a binding property, but can only serve as indications.