Which way to carry a tinny on the roof?

If you have it the "rightway up" the wind will tend to lift it to your vehicles stabilty detriment. I have never ever seen one carried like that and probably for that reason

Have also seen it asked why carry a tinny for 50,000k to use it for just a few days. If going for an extended trip it may turn out that you will be well overweight if you take too much. We found we had to even leave the roofrack behind, never mind a tinny and outboard. Most 4x4 have a hard time staying legal when loaded plus a van.

Something to consider also.

Unless the boat has a close fitting cover, the transom will catch so much air you'd thing you were dragging the anchor.
Upside down is the only way to go if you are car-topping it.

Possibly a better option would be a "Porta Bote"
Sits flat on the roof and less weight.



Ron

Not sure how they have taken off but these load right way up. Australian made.

http://www.mozzi.com.au/

They talk about the aero effect on the site.

Not giving any opinion but they caught my interest when I first saw them.

Dave

Have seen a fair few recently the 'right way' up , most of these are still actually on their light weight trailer with just the wheels and mud guards removed and carried inside the boat itself ….. then again as others have said ,you really need to use the damn thing to justify the extra weight / fuel and a 12ft boat with 16ft lizards ?

I have been to various fishing places on Cape York,12ft tinny high sides,always carried it upside down,the thing that you have to get right is how far the tinny sits out over the windscreen, get this right & the extra fuel consumption is not worth worrying about, my vehicle was Hilux extra cab 3ltr turbo.Friar.

We carry a tinnie on the roof, upside down and use a Custom Auto Loader to get it on and off. Drop it straight into the water. Been away 5 weeks so far and the boat has been in the water for over 3.

Fuel difference is around 1 - 2 lt per 100k, so average is around 19 - 20 lt per 100k.

Eggo, my thought would be that a continuous streamline formed by the car windscreen and the bow of the up- turned boat would present less wind resistance than the air trap created by the windscreen and the bow with boat upright.

Time for an update.
I have given this a lot of thought, made a couple of mockups and trials and have finally finished the first prototype. Took it for a test drive yesterday and I must say I am surprised.
No noticable difference to handling, performance or noise.
Some details ... Patrol has an upgraded OME suspension, Tinny plus all roof gear weighs approx 100Kg's, fully loaded we are sitting pretty well spot on GVM for the Patrol 3020Kg's. Test run yesterday performed at various speeds up to and including 105 Kph even went along the beachfront to see what effect a side wind had on stability. We will be towing a Hybrid off road van so we will not be breaking and land speed records (most likely we will be sitting on 90-95kph). Again we will be within both GVM and GCM specifications.
As you can see the tinny has a custom made waterproof tight fitting cover.

I do intend to have the rack fabricated by a local engineering firm to ensure the load is distributed across the roof evenly.

Thanks to everyone for there thoughts and comments.

See you on the road somwhere.