Priness R35

[petem]

I don't think we've ever had a Princess R35 thread but as the Cannes Topic seems to be straying into that area I thought it was worth starting a new one. Here's some of the comments lifted from that thread...

Hoping to get to see the Princess R35 too.

At least Princess are trying to move the game on with their R35 and which may result in a new drive technology that can be rolled out across other models.

R35 is on sterndrives Mike.

Perhaps you're talking about the foils that come out at the rear that give lift to the stern and drop the bows. Seems like they trying to fix a problem that wouldn't exist with a well designed hull (if I want my boat to attain maximum speed I'll reduce drag by lifting the tabs). I wonder if they've got the system working yet as it certainly didn't seem to be working when Hugo drove the prototype (as reported in the magazine). I feel sorry for future owners and dealers that have to support the retracting foil - I can see holidays being spoiled.

Despite the above, I'd love to have a go in one!

The foils are not entirely new. Someone is producing a similar smaller boats since a couple of years, and Aliscafi produced by Rodriguez have been doing the Italy small islands rounds since the seventies.

In the Aliscafi they are not cheap to maintain cause my question to an engineer who worked with Rodriguez was why they where never used on fast yachts like a Mangusta or similar.
Since they reduce dray and increase efficiency. Putting them on a 20 meter yacht will be an interesting challenge though.

I was gonna do Cannes this year and I had my flight booked but I cancelled two weeks ago for business reasons.
The flight from Malta is screwed and I only got two days of the boat show, and had to stay there for a week.

 

[petem]

PYB, you've fallen into the rap of assuming that the R35 lifts out of the water on foils (like the Aliscafi). It doesn't do this, all it has is trim tabs on poles that retract at a certain speed lifting the stern and lowering the bows. This is said to improve handling (i.e. cornering). Ironically, when Hugo tested the prototype earlier in the summer the system didn't seem to be capable of correcting the list generated by having four people on board so Princess were considering adding traditional trim tabs too.

You can read the R35 test drive article here...

https://content.yudu.com/web/u6f/0A3dnek/PRINCESSR35COVERDATE/html/index.html?page=6&origin=reader

 

[PowerYachtBlog]

PYB, you've fallen into the rap of assuming that the R35 lifts out of the water on foils (like the Aliscafi). It doesn't do this, all it has is trim tabs on poles that retract at a certain speed lifting the stern and lowering the bows. This is said to improve handling (i.e. cornering). Ironically, when Hugo tested the prototype earlier in the summer the system didn't seem to be capable of correcting the list generated by having four people on board so Princess were considering adding traditional trim tabs too.

You can read the R35 test drive article here...

https://content.yudu.com/web/u6f/0A3dnek/PRINCESSR35COVERDATE/html/index.html?page=6&origin=reader

Then it is just a good marketing exercise. If they wanted it to corner a lot they could have fitted her with jet drives and the result would have been very good.