Print Page | Close Window

Seabird sailing/rowing dinghies question

Printed From: The Fishing Website
Category: General Forums
Forum Name: The Boat Shed
Forum Description: Discuss all things boating.
URL: https://www.fishing.net.nz/forum/forum_posts.asp?TID=134865
Printed Date: 25 Feb 2021 at 9:50am


Topic: Seabird sailing/rowing dinghies question
Posted By: Bounty Hunter
Subject: Seabird sailing/rowing dinghies question
Date Posted: 13 Jan 2021 at 6:29pm
random question for anyone who has had one of these - particularly the larger 3.6 or 3.8m versions

when used as a motor boat - will they plane with enough hp on the transom? perhaps 6 or 8hp?


-------------
Death - Our community's #1 killer



Replies:
Posted By: OneWayTraffic
Date Posted: 14 Jan 2021 at 10:04am
The characteristics of a good displacement rowing/sailing boat are in opposition to a good planing boat. It almost certainly has upturned buttocks aft, in which case it will not plane.

If the hull bottom is curved like a banana over the last half of the hull it's displacement. 

Straight with no rocker: planing. 

Semidisplacement are in between. 








See the difference?


Posted By: OneWayTraffic
Date Posted: 14 Jan 2021 at 10:16am
That last one is 22' long, and specifically designed to go at a speed of 10-20km/h. At those speeds it's smooth and non pounding. As soon as more power is applied, it climbs up on its flat rear sections, sticks its bow in the air and gets up to 40km/h. 

The first one is my little D5 dinghy. It is very smooth and easy to move at low speeds as the curved stern provides little drag, but apply more throttle and it just digs a hole and burns fuel. 

The middle one is the one I'm building now. Hopefully it will plane!


Posted By: pjc
Date Posted: 14 Jan 2021 at 10:16am
Originally posted by Bounty Hunter Bounty Hunter wrote:

random question for anyone who has had one of these - particularly the larger 3.6 or 3.8m versions

when used as a motor boat - will they plane with enough hp on the transom? perhaps 6 or 8hp?

no will not plan and if like the one used for netting in the 89s bloody
unstable

-------------
Sex at 58.Lucky I live at 56


Posted By: old timer
Date Posted: 14 Jan 2021 at 7:48pm
No they don't plane. Best with abbot 4hp on the back and chug along.
I have put heaps of hp on the back and it just makes it handle terribly



Print Page | Close Window