Showing results 1 to 12 of 12
Search took 0.00 seconds.
Search: Posts Made By: Last Tango
Forum: Engines & props 28 October 2017, 18:33
Replies: 57
Views: 9,668
Posted By Last Tango
There's obviously a bit of distortion from the...

There's obviously a bit of distortion from the wide angle lens but the layout looks "bow heavy" and it looks like that's an extended tiller meaning, you're probably not sitting where we might have...
Forum: Engines & props 24 October 2017, 12:07
Replies: 57
Views: 9,668
Posted By Last Tango
That is complete overkill (as is jackplates and...

That is complete overkill (as is jackplates and the like) for the OP's problem and will cost five times the price!

Porpoising is the result of a fairly minor trim issue that doesn't take much to...
Forum: Engines & props 21 October 2017, 20:08
Replies: 57
Views: 9,668
Posted By Last Tango
Power trim/tilt ? There'll be gasps of...

Power trim/tilt ?

There'll be gasps of horror at this suggestion as plainly from previous discussions people have had mixed effect from them, but Doel fins are cheap, easy to fit and removable if...
Forum: Engines & props 20 October 2017, 11:46
Replies: 57
Views: 9,668
Posted By Last Tango
It will try harder to lift the bow you want to...

It will try harder to lift the bow you want to fill with ballast.:thumbs:
Forum: Engines & props 20 October 2017, 11:37
Replies: 57
Views: 9,668
Posted By Last Tango
The OP is having this problem with his wife and...

The OP is having this problem with his wife and kids, anchor, and 12 galls of fuel all moved forward (200Kg ?). just how much weight would you propose moving there?......300-400Kg?

This is a...
Forum: Engines & props 19 October 2017, 20:07
Replies: 57
Views: 9,668
Posted By Last Tango
Probably setting the engine cav plate a bit lower...

Probably setting the engine cav plate a bit lower will help as it lifts the bow but moving weight forward will undo that benefit and make things worse again.
Only two thing cause this 1) Trimmed...
Forum: Engines & props 19 October 2017, 12:43
Replies: 57
Views: 9,668
Posted By Last Tango
I wouldn't do anything quite as drastic as that...

I wouldn't do anything quite as drastic as that yet. Just try rearranging the loading a bit to get more weight aft and that will probably solve it.
It may not need as much as you think.:thumbs:
Forum: Engines & props 19 October 2017, 11:37
Replies: 57
Views: 9,668
Posted By Last Tango
Yeh, but it'll also force the speed down, so you...

Yeh, but it'll also force the speed down, so you apply more power to compensate...and the bow starts to lift.....etc. So you end up back in the same situation just using more power to get there
...
Forum: Engines & props 19 October 2017, 10:48
Replies: 57
Views: 9,668
Posted By Last Tango
No. You're not trying to hold the bow down, the...

No.
You're not trying to hold the bow down, the intent is to stop it "falling" cyclically.

Mechanics of "porpoising"

As the speed increases the wet surface of the boat moves progressively...
Forum: Engines & props 19 October 2017, 07:39
Replies: 57
Views: 9,668
Posted By Last Tango
No I meant "aft". I think the OP misunderstood....

No I meant "aft". I think the OP misunderstood. ;)
Forum: Engines & props 18 October 2017, 18:03
Replies: 57
Views: 9,668
Posted By Last Tango
Sorry. I meant to move weight back to stop...

Sorry.
I meant to move weight back to stop porpoising. You want to get the centre of gravity behind the leading edge of the whetted area.
Too much weight forward will cause the problem:thumbs:
Forum: Engines & props 18 October 2017, 12:11
Replies: 57
Views: 9,668
Posted By Last Tango
You've not got a lot of weight up near the bow? ...

You've not got a lot of weight up near the bow?

The porpoising starts when the leading edge of the whetted surface falls behind the centre of gravity of the boat and it's relying solely on the...
Showing results 1 to 12 of 12

 


All times are GMT. The time now is 08:02.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.