Tweakin the XF20 Jack Plate / Tunnel setup

[Hunch]

Hunch,

I would suggest you post on one of our Texas forums. Over here we run a lot of tunnel boats. That is why my Scout Flats boat has a tunnel and I'm building one in my GF16.

Try www.2coolfishing.com You'll have to register, but there is a boating forum. You may want to just put it on the TTMB forum as the boating forum there is not super active.

Just an attempt to help you out.
Tim

Will do thanks

[Hunch]

Finally ironed out most of the kinks in the plate install.

Uploaded a pic of my XF20 to the gallery. Best guess 45+ and stable as a rock.

[redfish55]

Hunch

Give us the details. What are you using for a prop, jackplate, how high have you got it mounted and how is that tunnel working.

45 mph sounds good. From previous conversations with the designer that boat is not designed to go that fast. I know you beefed yours up though. Does she feel solid at those speeds.

Just looked at your new pics. Damn she looks good!

I have decided to try building mine myself. If ya'll can do it I can too.

[Hunch]

Hunch

Give us the details. What are you using for a prop, jackplate, how high have you got it mounted and how is that tunnel working.

I used the short height version of the transom. 16" to top of tunnel and 20" to bottom of hull. I like the look of the lines but the jack plate (CMC) needed to be drilled to get the cavitation plate where I wanted it, even with bottom of hull in the lowest position and 2" above top of tunnel at the highest position. Hole shot to plane in less than 2 boat lengths and will run in 5-6" of water maybe less if I want to cut a wheel ditch.

Prop is 13.5 x 17 (5000 rpm max) which will be changed out to a 4 blade for better raised performance. This prop did not work with the Detwilers turbulance. It will be a good spare.

Steering is slippery and I'm glad I added the runners and keel for lateral stability.

So far no stress indicators and no hull twist in a chop. I added to the framing but kept it somewhat light compared to my other boats.

I couldnt ask for better balance and trim. The boat is absolutely stable at rest and at speed. Dry as a good Martini.

Hunch is happy