Fascadale
Well-known member
I have assembled a Jordan Series Drogue. There are more details here.
I now have to work out the details of the attachment system. Don Jordan recommended.............
..........................“The optimum attachment for the drogue is clearly a strap similar to a chain plate, bolted to the hull at the corners of the transom as shown in the sketch. This arrangement feeds the load directly into the hull and imposes no bending or pullout loads on the hull or deck. For a load of 14,000 lbs a strap 1⁄4 x 2.25 x 18 inches attached by six 3/8 inch bolts would provide a conservative design.”
To this end I have had fabricated two stainless steel straps, about 4.5mm by 60mm by 18 inchs. These will be held on with four or perhaps three countersunk M10 machine screws through bolted with suitable backing plates. (I sail a heavily built long keeled 26ft MAB, displ. 5,130 lbs plus kit)
My question concerns bedding the straps to the hull. They will be mounted on a virtually flat area just below the toerail.
Should I put anything between the strap and the hull and if so what? Something which will set solid or something that will retain some flexibility? Recommendations please.
I suppose the same question applies to the backing plates.
Thanks
I now have to work out the details of the attachment system. Don Jordan recommended.............
..........................“The optimum attachment for the drogue is clearly a strap similar to a chain plate, bolted to the hull at the corners of the transom as shown in the sketch. This arrangement feeds the load directly into the hull and imposes no bending or pullout loads on the hull or deck. For a load of 14,000 lbs a strap 1⁄4 x 2.25 x 18 inches attached by six 3/8 inch bolts would provide a conservative design.”
To this end I have had fabricated two stainless steel straps, about 4.5mm by 60mm by 18 inchs. These will be held on with four or perhaps three countersunk M10 machine screws through bolted with suitable backing plates. (I sail a heavily built long keeled 26ft MAB, displ. 5,130 lbs plus kit)
My question concerns bedding the straps to the hull. They will be mounted on a virtually flat area just below the toerail.
Should I put anything between the strap and the hull and if so what? Something which will set solid or something that will retain some flexibility? Recommendations please.
I suppose the same question applies to the backing plates.
Thanks