The Great River Race 2025 on the Thames

Time lapse of the 2025 Great River Race.- shows the scale of the event

Have You Ever Heard of the Great River Race

No, nor had I until I was invited to attend as part of the safety fleet.

In effect The Great River Race is London’s River Marathon. It’s a spectacular boat race covering 21.6 miles from Millwall in the East to Richmond in the West.

The rules for this River Race are simple. There are fixed seats. Dragon boats are not allowed because they like to sink.

The rules are based on the Watermen principle. Each vessel must carry a passenger and a cox. It also needs a 3’ x 2’ flag.

The event started in 1988 with 61 local boats. It has now grown into a major international event.

Competitors from America, Australia, and many European countries are taking part.

It is the largest rowing race in the UK when you consider the number of people on the water at the same time.

This is where the RIBs come into play.

To keep this many rowers safe takes a herculean effort by the RIB community.

Northern Exposure Rescue work with the Port of London to assemble no less than 35 safety boats.

This is the largest grouping of RIBs in England. It beats the Annual Pasty Run into 2nd place.

Only the Easdale Rendezvous tops it as far as meet-ups go across the British isles.

(The story continues below the gallery. Click to enlarge the photo.

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Propeller Physics Every Boat Owner Should Know

A Deep Dive in Propeller Physics

The video examines microscopic bubbles that gradually corrode metal and affect propeller performance.

It also investigates long-debated topics like blade count and pitch, revealing their true impact on boat speed.

These combined factors explain what actually drives propulsion and how subtle differences influence overall efficiency.

Proper engine alignment is shown to dramatically affect thrust, performance, and fuel efficiency.

The distinctions between ventilation and cavitation are clarified, exposing common misconceptions among boat owners.

Cupped blades are highlighted as a major innovation that has transformed modern propeller performance.

Whether the prop is aluminum, stainless steel, or advanced alloy, these insights reveal mistakes that can cost thousands.

They also demonstrate adjustments that unlock hidden power and improve overall responsiveness.

Conclusion

The video uncovers engineering secrets manufacturers rarely disclose, giving viewers the knowledge to maximize acceleration and efficiency.

It empowers boat owners to make informed choices and optimize the performance of their most critical component.

So, this video on propeller physics have much more in store than you thought.


I’ve posted a video of a very special propellor: Sharrow™ Prop: A Solution to Going Faster, Further and Consuming Less?

This video was published on the Vintage Boats YouTube channel.

Looking for a RIB Brand on RIBsONLY.com: 250+

Category look-up @ RIBs ONLY - Home of the Rigid Inflatable Boat

Finding a RIB Brand Made Easy

Discover the ultimate resource for RIB enthusiasts on RIBsONLY.com. Now boosted with this valuable addition.

I’ve published a dedicated page where you can find every RIB brand I’ve ever published.

Easily search, compare, and learn about manufacturers worldwide, from renowned names, exciting newcomers and others.

Each list item links directly to detailed articles, videos, or photo galleries for deeper insights.

Whether you’re buying, researching, or simply passionate about Rigid Inflatable Boats (RIBs), this page keeps you informed.

Dive into the world of RIBs and explore the complete overview of all published RIB brands in one convenient place!

I’ve also added other categories, including the how-to posts.

Here’s the link. By the way, I’ve placed it also in the footer for your convenience.

Do visit my growing YouTube channel and if you like what you see, please subscribe. It keeps me going. Thank you.

OLR 40SRC Twin 450 hp XTO Yamahas

OLR 40SRC Stands for Olympic RIBs

The video presents the OLR 40SRC, a luxury RIB powered by twin Yamaha XTO 450hp V8 engines.

Showcased by our Greek friends at e-Ribbing.com.

Its sleek hull, flawless finish, and high-quality materials immediately convey sophistication, elegance, and refined design.

The deck layout is thoughtfully arranged, combining ergonomic design with practical functionality for leisure or extended trips at sea.

Measuring approximately 12 meters in length with a 3.25-meter beam, the boat weighs about 5,000 kg including engines.

The combination of cabin and deck design maintains a sporty, aggressive profile while providing comfortable overnight accommodation.

Its deep-V stepped hull ensures confident handling, allowing high speeds and safe long-distance cruising in rough offshore conditions.

During sea trials, the boat demonstrates linear acceleration, stable handling, and impressive performance even with a fully loaded cabin.

Helm visibility is excellent, controls respond precisely, and technology integrates seamlessly without disrupting the clean cockpit design.

Premium features like shock-mitigating seats and advanced navigation systems enhance both comfort and performance on every journey.

The twin Yamaha engines use direct fuel injection and integrated electric steering. They deliver up to 96 net amps at low RPM.

This setup maintains optimal running angles and keeps the boat responsive and easy to handle throughout the entire RPM range.

Overall, the OLR 40SRC combines luxury, style, and thrilling offshore capability, proving itself during the sea trial in the video.


I’ve shared more videos of this Greek RIB brand.

This video was published on the e-Ribbing. com YouTube channel

Specs

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Grand G680 RIB Yamaha 200 hp Powered

Grand G680 Ukranian Built

Introducing the Grand G680 — a 6.8-meter (22 foot) Rigid Inflatable Boat (RIB) that redefines what a mid-sized RIB can be.Grand G680.

This versatile craft blends cutting-edge design and luxurious practicality. It comes fully equipped with premium amenities.

These features include a spacious refrigerator, integrated sink and tap, and an on-deck shower.

They also have an electric anchor system, convertible table setup, and an adaptable sundeck configuration.

According to the company, the Grand G680 is the perfect family adventure boat. It is also a refined yacht tender.

Engineered with a precision-moulded fibreglass hull, it ensures remarkable balance, agility, and comfort. It offers a smooth, confident experience on the water.


This video was published on the Grand Boats Australia YouTube channel.

This RIB brand shows up in more of my posts too: Watch more Grand videos

Specs

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