I'm thinking these gas boats being heavy,compared to nitro, need the CG further back.With your 58 ,make the radio box as far back as you can in case you need to go 31-32% as Dave recommends,,happy building lol
Nice one Dave,Yeah,I can imagine those gas engines weigh a bit,needing to be placed rearward,and also I notice your boat has long horns and shorter tunnel lenght compared to the old Sprincats,putting the CG further back.I get what your saying about corner bog,,cheers
I'm glad you're inspired to get your 2 boats running lol,,After thinking about making 2 engine mount positions,it might be tricky to set up the flex shaft and tube,because of the steep shaft angle and engine height,,I measured the CG on my boat,and its 12.5" from transom,and being a 35"...
Yeah,,That other 42 inch sounds like the old 90 size sprintcat,,if you can fit a gasser in there,,probably work out,,maybe some extra reinforcing braces around the engine mounts,,as long as you can get the engine back far enough for the CG
My 35" .45 Sprintcat is around 35-40% from transom using a low lift prop and strut angled up slightly to lift bow,Won and finished many races while others blew over in windy/rough water conditions,,Ive even added a 1/2 pound of lead in the nose in bad conditions,They can be tricky to set...
Hi Derek,,I've never used JB,,but the best epoxy I've used here in Australia is Selleys Araldite Super Strenght 24hr epoxy,,strong bond ,never gets brittle and is fuel resistant,,I used it for laminating plywood/boatbuilding and also made a ramp for a drum rotor,,no other 30 min type epoxies Ive...
I'm happy to help Toru,,The image describes what I thought,,2 boost ports with a bridge in between ,so the teflon pad can't fall out or get caught on an edge.
Cheers
The other way around(intake side),,as it would get caught in the exhaust port or fall out and do damage,,I'm assuming it's like a Kand B engine with a free floating wrist pin with teflon pad,,Does the piston only have 1 hole or 1 blind hole or a C-clip on one side ? Maybe post some pictures of...
I get close with a vernier caliper,then use the solder trick down the plug hole to recheck,,make sure the solder is touching the cylinder wall,,biggest problem is with the piston pushing the liner up at TDC because of the nip,,Either shim up the liner a 1/4 inch and subtract or with the head on...