- Joined
- Apr 13, 2011
- Messages
- 6,347
All Outboard Tunnel Racers, we need you help. Seems like I opened a can of "Outboards" with my post below. This has all been taking place under another thread but I thought it warranted exposure to everyone. Please read below and let us all know how you think as this very topic can affect how we think about outboards today. I think its very obvious, an outboard is mounted outboard on a boat, and a inboard is mounted inboard on a boat. This to me is so obvious I didn't think it needed to be clarified in the rule books, but with the answers below and the lack of a fully staffed technical committee at the IMPBA, (the hydro and technical director positions are vacant), it may come to just that...........
I have included what I felt to be very clear rule descriptions when it comes to outboards below:
Wikipedia description:
Outboard Motor
An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine,gearbox and propeller or jet drive, designed to be affixed to the outside of the transom and are the most common motorized method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust. The skeg also acts as arudder when the engine is not running. Compared to inboard motors, outboard motors can be easily removed for storage or repairs.
When boats are out of service or being drawn through shallow waters, outboard motors can be tilted up (tilt forward over the transom mounts) to elevate the propeller and lower unit out of the water to avoid accumulation of seaweed, underwater hazards such as rocks, and to clear road hazards while trailering.
Transom
In naval architecture, a transom is the surface that forms the stern of a vessel. Transoms may be flat or curved and they may be vertical, raked forward, also known as a retroussé or reverse transom, angling forward (toward the bow) from the waterline to the deck, or raked aft, often simply called "raked", angling in the other direction.[1][2][3] The bottom tip of the transom can be approximately on the waterline, in which case the stern of the vessel is referred to as a "transom stern", or the hull can continue so that the centreline is well above the waterline before terminating in a transom, in which case it is referred to as a "counter stern"[4] or "cutaway stern."[5]
I have included what I felt to be very clear rule descriptions when it comes to outboards below:
Wikipedia description:
Outboard Motor
An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine,gearbox and propeller or jet drive, designed to be affixed to the outside of the transom and are the most common motorized method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust. The skeg also acts as arudder when the engine is not running. Compared to inboard motors, outboard motors can be easily removed for storage or repairs.
When boats are out of service or being drawn through shallow waters, outboard motors can be tilted up (tilt forward over the transom mounts) to elevate the propeller and lower unit out of the water to avoid accumulation of seaweed, underwater hazards such as rocks, and to clear road hazards while trailering.
Transom
In naval architecture, a transom is the surface that forms the stern of a vessel. Transoms may be flat or curved and they may be vertical, raked forward, also known as a retroussé or reverse transom, angling forward (toward the bow) from the waterline to the deck, or raked aft, often simply called "raked", angling in the other direction.[1][2][3] The bottom tip of the transom can be approximately on the waterline, in which case the stern of the vessel is referred to as a "transom stern", or the hull can continue so that the centreline is well above the waterline before terminating in a transom, in which case it is referred to as a "counter stern"[4] or "cutaway stern."[5]
Last edited by a moderator: