Sailaway Cup 75 (Prototype)
by Admiral
|
Under construction |
|
| "Stride Bullet" | |
|
PROTOTYPE: changes are tested and experimented on this prototype! Not for use in Sailaway events. Jan Kruidvat, CEO of Pro Stride sport equipment: "A bullet is a projectile shot from a gun barrel !" We enjoyed having Jan aboard to show him what she can do. Hull 1 promptly was christened "Stride Bullet" Geometry of the hull and foils is subject to changes as "Stride Bullet" continues to perform as test bed for the Sailaway Cup's 75 footers prospective 50 + kts BS at 15-20 kts TWS (Work in Progress) target speeds The test program running since 01 2024 already exceeds expectations. Beating design polars by more than twofold. Because of the unexpected breakthroughs in foil design, release to market has been moved up by 6! months..expected now for 3rd week of September 2024. Bar show stoppers. (Issues that may be found and that would demand postponement. ) The SC75 development is sponsored by Stride Pro sports equipment manufacturer. Stride Pro signed up as the main sponsor. Stride Pro is welcomed aboard the virtual sailing world. Admiral: "The SC75 is very hard to sail and even harder to get up on foils even with a lifetime experience, sometimes I have struggled hours to get her going or having to return to port disillusioned. She is not for the faint of heart. Absolutely not recommended for beginners! Foiling is only possible in Salt in your veins mode !! " SC75 is equipped with twinfoil mainsail and a double end plate boom. Issues: Jib cannot be sheeted in, in salt in veins mode. Autopilot "Charlie" cannot control foil angle beyond max down (-90° and max up (+ 90°). Foiling angles near 0° are required. Issues with decktracing causes Avatar to get stuck at places. Pitching stability control is automated coming changes may make operation entirely impossible Twin foil main is created utilizing loopholes that may no longer be exploitable at any time in the future. Twin foil main may however also be introduced as a feature, with proper aerodynamics applied in the future. Hydrofoils and rudder profiles are not considered, introduction of profiles, slats and flaps to manipulate shape and means to change angle of attack may drastically change the behavior. Requiring control surfaces and reconsideration of the application of the NACA 008 profile used to shape the appendages. All issues were reported and work on them is in progress. Updates are set to be published on the first Monday of the month. Feel free to request the creator for access to the prototype for testing. Improvements and fixes will be tested on prototype before transfer to the real live boat. |
|
|
created by Admiral performance weight 15.8666 |
|
Specifications: |
|
| Hull type | Monohull with foils |
| Length over all | 22.42 m. / 73.6 ft. |
| Length waterline | 19.32 m. / 63.4 ft. |
| Beam | 14.29 m. / 46.9 ft. |
| Depth | 2.46 m. / 8.1 ft. |
| Minimum depth | 2.23 m. / 7.3 ft. |
| Total weight | 6195 kg / 6.1 long tonnes |
| Ballast | 0 kg / 0 pounds |
| Max. waterballast per side | 0 liter |
| Mast | 28.05 m. / 92.0 ft. |
| Sail area up wind | 374.6 m². / 4032 ft². |
| Max. sail area | 374.6 m². / 4032 ft². |
| D/L ratio | 20 |
| S/D ratio | 111.0 |
| Sails: | |
| Mainsail | 142.0 m². / 1529 ft². laminate |
| Mizzen | 142.5 m². / 1534 ft². laminate |
| Jib | 90.0 m². / 969 ft². laminate |
|
|
|
|
|
|