Thanks Will

Might be a little time as away on holiday for a week at the moment, back for a week and then away again. But can't wait to see how it performs as it is different (for me) from my prop shaft models and is probably the only Huntress with a stern-drive ever built.

Chris

Well done with your progress Chris.
Exciting news that a lake test is well in your sights.
I for one am looking forward to hearing how well she performed.

Will

Flaxybuck - no problem, some folks get arsy on other forums when someone dares to go off thread but I take the view if we were face to face having a chat other things would be discussed and some useful and interesting things often come up. Some threads would be very short if we stuck rigidly to the subject!

As Rod says your hull will have no problem getting on the plane. It is similar to my Fairey hulls which are deep vee which were designed to give a more comfortable ride in rough seas than more flat bottomed boats.

Rod, thanks for your kind comments. Let's wait and see how my deep V performs. Who knows - it could yet be manned by submariners !😉

Hi Chris. My apologies for going off at a tangent about running strakes when your post is about progress on your Huntress. I really appreciate how well you are finishing your boat both inside and out. The interior is looking especially good both in terms of the neatness of the installations and the quality of your work. Well done. Too often we see boats looking good on the water only to find a snakes nest when you look inside amidst an unfinished or poorly finished interior.
I look forward to seeing more of your Huntress.😉😉

Flaxbybuck, you hav underestimated your skill as a marine architect. A deep-V hull is a type of planing hull. Simply said, a planing hull lies on top of the water, instead of in it. This makes it A LOT faster than displacement hulls, but they also handle poorly in rough water. Even with small waves, most planing hulls will be incredibly bumpy and wet. In contrast, displacement hulls are usually round on the bottom with ballast placed low in the center. At rest, round hulls tend to roll with the waves and swells.

Chris,
The hull shown in my pic is a design of my own making. It is a deep V hull and as such is not expected to rise onto the plane. Nevertheless I have included rubbing strakes in the belief that they will provide added directional stability. Time will tell !

When I was much younger I used to go windsurfing, and recall how the design of boards changed almost every year. Some time in the 1980s the equivalent of rubbing strakes were introduced, the object being to reduce or stop the board from sliding sideways across the water. At speed windsurfing boards would get onto the plane and would have this sliding tendency. The only component to counter this was the presence of one or more fins, plus the dagger board. However, when sailing before the wind the dagger board would be totally retracted, and this I guess is where the presence of rubbing strakes helped directional stability.
As to the arrangement of the rubbing strakes on my hull - to be honest, a complete guess. I have noticed that many different arrangements are used on model boats (three different ones on this post alone !)
This brings into question their very function. My guess would be:
1. To protect the bottom of the boat when grounding, and
2. To assist in lifting a hull onto the plane
in which case my use of them on a deep V hull is totally useless ! (So much for my qualities as a marine designer)
But, I have started so I will finish - the boat that is, and let you know how it performs. I have worked on the boat for two years now so please don't hold your breath !!😉

Did some Googling on strakes and as I guessed the lads with very fast/racing boats do in some cases fit strakes for purposes other than creating lift to get on the plane.

They fit them to reduce the amount of sliding and running wide in fast turns. In some cases to stop the boat tripping over its keel as it slides, forcing the boat to sit upright and causing the "driver" to lift off the power. It varies from boat to boat and not all of them benefit from or need strakes.

I know that full-sized Faireys can have different layouts of strakes on the same model e.g. they can run either parallel to the keel or the chines and finish differently at the bow. I doubt that there is much difference in practice though.

Flaxybuck, what is that hull of yours for, as it is unusual to have the strakes like that at the bow?

Here is my Huntsman 31 build which is different again!

Chris

Hi Rod C

Many thanks for your post. Flaxbybuck had a point that I did not address his query directly, - - but that is because even with scale models we must consider models and real craft quite differently.

Faced with heavy "sticky" water and effectively hurricane force winds, our tiny models certainly sail in a "challenging" environment!

As Buck says, strakes are a separate matter; and I have yet to be convinced they are strickly necessary.

Nevertheless I think we all agree that either by good hull design or by additional strakes; our models must get out of the water and on to the plane to go fast. Otherwise all our wonderful power is just wasted in making a huge wash!!

Happy sailing.

Dr John F Leeds and Bradford MBC. 😊😊😊

Rod - I think that was due more to the power, or lack of, of the engine!

When I was young we had a Fletcher speed boat which initially we fitted with a 40hp Evinrude from another boat. It did get on the plane but the performance was just adequate. We later replaced it with a 70hp Volvo Penta and it performed well, though it used to go through a 5 gallon tank of 2-stroke in a short time on full chat!

Even that is small by today's standards and some of them are the price of a small car!

Chris