HARDY 27....Is one engine better than two???

[Morpheous]

Nice. (Both)

Much smaller rudders than yotties have though. I've also wondered why mobos don't seem to get very excited about rudder profiles. Having had a dabble at dinghy building and competitive dinghy racing, rudder profile can make a noticable difference to the performance of a boat. Mobos often seem to have a slab!

 

[boatone]

The keel issue is important when it comes to low speed handling. Many sports boats have virtually no keel at all and are a real pig to handle, especially when its windy as they have little grip on the water.

The Hardy 27 is a semi-displacement design with a substantial keel running most of the length of the boat - from the looks of the pics of the Mariner 26 I would say the 27 has a more substantial keel profile.

However, handling any sort of motor boat is a very different experience to motoring in a sailing boat and needs getting used to.
I speak from experience of both as I used to sail Hurley 22 and 26 on the Hamble in years gone by.

 

[boatone]

Nice. (Both)

Much smaller rudders than yotties have though. I've also wondered why mobos don't seem to get very excited about rudder profiles. Having had a dabble at dinghy building and competitive dinghy racing, rudder profile can make a noticable difference to the performance of a boat. Mobos often seem to have a slab!

Deep Keel yachts can carry deeper rudders as they are protected by the depth of the keel. On a mobo the deepest part of the boat, and therefore prone to damage, is usually the stern-gear and rudder.
Also, the flow of water over the rudder is generated directly by the prop when motoring whereas the sailboat needs a bigger area to achieve directionality when ghosting under sail.

 

[boatone]

Found a pic of the underside of my 27 which shows the keel

 

[Firefly625]

...........The Hardy 27 is a semi-displacement design with a substantial keel running most of the length of the boat - from the looks of the pics of the Mariner 26 I would say the 27 has a more substantial keel profile.

wouldn't surprise me as Hardy's aim with the Mariner was to have a higher cruising speed than that of the 27 & they worked on the hull profile and fitted a more powerful engine to achieve this.

 

[SHUG]

Nice pictures from Firefly 625. Can the round bar connecting to the rudder take the loads if drying out?

 

[Morpheous]

Deep Keel yachts can carry deeper rudders as they are protected by the depth of the keel. On a mobo the deepest part of the boat, and therefore prone to damage, is usually the stern-gear and rudder.
Also, the flow of water over the rudder is generated directly by the prop when motoring whereas the sailboat needs a bigger area to achieve directionality when ghosting under sail.

Good points, but you would still think that an aerofoil shape would be more efficient than a slab even behind a prop

 

[PaulGooch]

Nice pictures from Firefly 625. Can the round bar connecting to the rudder take the loads if drying out?

I was wondering that. It can on mine, i can even plough over the odd sandbar, where depth is about a foot less than draft <oops>

 

[bluejasper2]

done the same eyemouth harbour last summer trying to get in to soon

 

[Firefly625]

Nice pictures from Firefly 625. Can the round bar connecting to the rudder take the loads if drying out?

thanks!, and indeed it can, I won't say how I found out..

 

[Firefly625]

Found a pic of the underside of my 27 which shows the keel

now thats a keel..!