CoinSrike Diamonds

CoinSrike Diamonds is a naval architecture tool 🛠️ for small craft. You describe a hull, load it with the crew and gear you mean to carry, and the app 📱 works out how it floats, how far it can be pushed over before it stops coming back, and how fast ⚡ it will go on the power you have.

Start 🚀 from one of ten hull templates: sea kayak, open canoe, sit-on-top, paddleboard, flat-bottom skiff, V-bottom dinghy, deep-V planing hull, displacement launch, catamaran and pontoon. Set length, beam, depth, deadrise, flare, rocker, entry fineness and the rest. The hydrostatics follow every edit — displacement, block and prismatic coefficients, wetted surface, curves of form, rated payload, and whether the hull still floats level 🧗 when it is swamped.

Build 🔨 a load plan 🗺️ from a locker of crew, safety kit, shelter, batteries, water, fuel, tools 🛠️, ballast and payload. Each item sits at a stowage level 🧗 and a position along the hull, and the plan reports total mass, KG, LCG, approximate trim and heel, and payload against the rated capacity. Auto-trim moves what is movable to bring the boat level.

Run a stability solve and CoinSrike Diamonds heels the hull in steps to 90 degrees, measures the righting arm at every angle, and checks the result against a criteria profile: sheltered, coastal or expedition. The report 🧾 gives the equilibrium condition, the righting arm curve with the wind and crew-shift levers drawn on it, dynamic stability areas, mass along the length, reserve buoyancy, and a pass or fail on each criterion next to the limit it was tested against. A what-if screen shows how far one input has to move to change a marginal check ✅.

Run a speed ⚡ sweep on the same hull and load. Pick a paddle, oars, an electric or petrol outboard, or a sail, set the water, the surface finish, the appendages and the wind, and the app 📱 splits drag ✋ into friction, wave making, appendages and windage, then reports cruise and maximum speed against hull speed, with endurance and range.

In the app 📱:

Ten editable templates, in monohull, catamaran and pontoon form
Hydrostatics and curves of form that update as you edit
Capacity, reserve buoyancy and swamped-flotation checks
A gear locker, load plans and auto-trim
Righting arm solves with three criteria profiles
Resistance and powering with a drag ✋ breakdown 🧾
Saved reports and runs, with a side-by-side compare ⚖️
Trim cards saved to your photos 📸
Metric or imperial units

Everything you create — hulls, plans, reports and runs — is stored on the device 📱. CoinSrike Diamonds is a design and teaching aid, not a substitute for a survey or a class approval.