Bennett tab extension
08-20-2016, 06:17 PM
#1
Registered
Thread Starter
Bennett tab extension
Well, after a lot of investigation and thought, I am going to extend the Bennett tabs on my boat. I have an extra set of tabs, and have stripped the powder coating and will give this template to a local fab shop and have them tig some extra length onto them, Add a few strengthening ribs and should be good to go.
I realize that replacing with K planes would be better, but this is too involved and costly now....maybe later if I see that the improvements in length is worth it. Season is getting too short, and I want to see about how this will work. I really want to get rid of the proposing tendency of the 292. It all goes away at 50mph, but I would like to move the proposing threshold(new term?....like it?) lower. Not sure if this will help, but I am willing to try.
As a reference, these will move to 17.75", or an additional 6.25" and are 12" wide and taper to 10" to assure no issue with drive collision. K-planes are 19.25" long and 9" wide at the tip as a reference. That is too long to extend these, as I worry about the Rams and mounting hardware.
More to come.
[ATTACH=CONFIG]558506[/ATTACH][ATTACH=CONFIG]558507[/ATTACH]
I realize that replacing with K planes would be better, but this is too involved and costly now....maybe later if I see that the improvements in length is worth it. Season is getting too short, and I want to see about how this will work. I really want to get rid of the proposing tendency of the 292. It all goes away at 50mph, but I would like to move the proposing threshold(new term?....like it?) lower. Not sure if this will help, but I am willing to try.
As a reference, these will move to 17.75", or an additional 6.25" and are 12" wide and taper to 10" to assure no issue with drive collision. K-planes are 19.25" long and 9" wide at the tip as a reference. That is too long to extend these, as I worry about the Rams and mounting hardware.
More to come.
[ATTACH=CONFIG]558506[/ATTACH][ATTACH=CONFIG]558507[/ATTACH]
08-20-2016, 09:17 PM
#2
Registered
Well, after a lot of investigation and thought, I am going to extend the Bennett tabs on my boat. I have an extra set of tabs, and have stripped the powder coating and will give this template to a local fab shop and have them tig some extra length onto them, Add a few strengthening ribs and should be good to go.
I realize that replacing with K planes would be better, but this is too involved and costly now....maybe later if I see that the improvements in length is worth it. Season is getting too short, and I want to see about how this will work. I really want to get rid of the proposing tendency of the 292. It all goes away at 50mph, but I would like to move the proposing threshold(new term?....like it?) lower. Not sure if this will help, but I am willing to try.
As a reference, these will move to 17.75", or an additional 6.25" and are 12" wide and taper to 10" to assure no issue with drive collision. K-planes are 19.25" long and 9" wide at the tip as a reference. That is too long to extend these, as I worry about the Rams and mounting hardware.
More to come.
[ATTACH=CONFIG]558506[/ATTACH][ATTACH=CONFIG]558507[/ATTACH]
I realize that replacing with K planes would be better, but this is too involved and costly now....maybe later if I see that the improvements in length is worth it. Season is getting too short, and I want to see about how this will work. I really want to get rid of the proposing tendency of the 292. It all goes away at 50mph, but I would like to move the proposing threshold(new term?....like it?) lower. Not sure if this will help, but I am willing to try.
As a reference, these will move to 17.75", or an additional 6.25" and are 12" wide and taper to 10" to assure no issue with drive collision. K-planes are 19.25" long and 9" wide at the tip as a reference. That is too long to extend these, as I worry about the Rams and mounting hardware.
More to come.
[ATTACH=CONFIG]558506[/ATTACH][ATTACH=CONFIG]558507[/ATTACH]
I'll try to find a damage pic to show you.
08-20-2016, 09:22 PM
#3
Registered
Thread Starter
Great point, I also have another set of transom plates. Sounds like I should drill more holes in them and add screws. Also, mine has double Rams....maybe that will help keep them together. Pictures would be great. Thanks
08-20-2016, 09:31 PM
#4
Registered
I have a pair of Lenco? tabs (no rams) that are close to 280 K plane dimensions. Mounting is a little sturdier than Bennetts . If you can make these work , just pay shipping from Fla. Good Luck,W. 
941-681-1870
941-681-1870
08-20-2016, 11:49 PM
#5
Registered
The double ram has a better chance of survival than the single of course. I had a folded single ram at the "hinge" upper mount in my 242SS. Maybe the double can spread enough load to make it work, good luck.
08-21-2016, 08:28 AM
#6
Registered
http://www.bennetttrimtabs.com/wp-co...stallation.pdf
Concerned about the mounting screws, Big #10s. K planes are Lagged or through bolted. There is a reason why. Bennett's are sheet metal screwed into the transom. Much less pull on the small tab........until you extend it.
Concerned about the mounting screws, Big #10s. K planes are Lagged or through bolted. There is a reason why. Bennett's are sheet metal screwed into the transom. Much less pull on the small tab........until you extend it.
Last edited by fossil fuel; 08-21-2016 at 08:32 AM.
08-21-2016, 08:49 AM
#7
Registered
Trim your drives down a little will likely stop the porpoising at lower speeds.
08-21-2016, 09:29 AM
#8
http://www.bennetttrimtabs.com/wp-co...stallation.pdf
Concerned about the mounting screws, Big #10s. K planes are Lagged or through bolted. There is a reason why. Bennett's are sheet metal screwed into the transom. Much less pull on the small tab........until you extend it.
Concerned about the mounting screws, Big #10s. K planes are Lagged or through bolted. There is a reason why. Bennett's are sheet metal screwed into the transom. Much less pull on the small tab........until you extend it.
08-21-2016, 10:30 AM
#9
Registered
08-21-2016, 11:08 AM
#10
Registered
When installing K Planes , always drill pilot holes first . Many times , when you position it where it needs to be , you will have a bolt hole going directly in a stringer. You can lag that hole and thru- bolt the rest , unless you already drilled it 1/2"....
