V4.1 Product Catalogue Now Available

The latest update to our product catalogue, version 4.1 is now available. This latest edition includes a wide range of new products, more accurate and detailed information, and a streamlined navigation system, ensuring a seamless experience for our customers.

The catalogue can be downloaded now from our website: Allen Brothers Catalogue.

What’s New in the V4.1 Catalogue:

Expanded Product Range: Discover the latest additions to our collection (go to the bottom of this post to see the latest additions), featuring innovative designs and cutting-edge technology to meet the evolving needs of the marine industry.

Enhanced Accuracy: Benefit from updated and precise product specifications, ensuring you have the most reliable information for your purchasing decisions.

Improved Navigation: Improved layout and product placement for intuitive browsing, allowing you to find products quickly and effortlessly.

“We are committed to providing our customers with the best products and the most user-friendly experience possible,” said Liz Adams, Managing Director of Allen Brothers. “Our new catalogue reflects our dedication to quality and customer satisfaction, with enhancements that make it clearer to find product information.”

The Ultimate Guide to Purchase Systems and Mechanical Advantage.

In this guide, we’re breaking down the nitty-gritty of purchase systems, from the straightforward simplicity of the “simple” system to the power-packed intricacy of the “compound” system. We will also take a look at how to calculate a purchase system and the steps you should take to design your own.

A purchase system is like your boat’s backstage crew, working behind the scenes to make sailing a breeze. It involves blocks (the unsung heroes) and ropes, creating a setup that multiplies your muscle power, making sail control and rigging adjustment a piece of cake.

Jump To

Simple Purchase Systems

Mechanical Advantage

Increased Mechanical Advantage Tips

Mechanical Advantage Line Loading

Compound Purchase Systems

Compound System Advantages

How to calculate a MA system

Setting up a new system

Examples of purchase systems

Simple Purchase Systems

Let’s start with the basics – the “direct” approach. In a simple “direct” purchase system, there’s just one block, one line (rope), and one straightforward mission: to control the load. It’s a 1:1 ratio, meaning the force you exert is the force felt by the load. Perfect for tasks like raising the centreboard on a dinghy or adjusting basic sail tension. Simple, effective, and great for when you need no-nonsense control.