gilbert galli
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have you tried another spark plug
Something New that i am working on.
- Thread starter Mike Hughes
- Start date
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Mike looks great as usual !!!
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I will give that a try. I know the right one works. So I will start with that. I do have some back ups.
Mike
gilbert galli
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I had two ngk cmr7h spark plugs that cracked, the engine was running fine when empty, but once in the water it had no power, it had the same symptoms as a too rich carburetion
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Thats is exactly how it is acting. Seems like it rich and wont spool up.
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OK, got some good and bad news. Good news is I was able to mount the left back up and run some fuel thru it with the right spark plug. Motor acted like it was suppose to. Problem is that I also ran the right spark plug after the left and it seem to be working fine as well. I hate it when the problem is not repeatable. Since there is no way to troubleshoot it at that point. Frustrating.......'
Mike
Mike
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Besides my motor issue, I made a few changes to help with the ride. It was pulling to the right hard under acceleration. I must of been drinking lots of beer when I laid out the bend on the turn fin. I usually have the top of the fin parallel with the bends. That way I can reference it to a straight line from boom to boom. The booms are level with ride. I had the sponson off the boat and the turn fin did not look right. It was tucked back and pulling the sponson down and right. Got out the measuring stick and sure enough. Dumbass crew chief is fired......LOL I also made a shim for the turn fin to put more left in. Easier then drilling booms and reversible. I also put some tuck in the rudder. This too was done with a shim that can be reversible. I also lower the angle of my rears shoes. There are a couple of Buaas props being built as well. Now just have to wait 2 weeks till the next race and she should hall the mail.
Mike
Mike
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Don,
Yes they did. Still not done. Need some new props. I think they are too beefy. Going from 3016-20-50 to 3017-19-38. Mark is having good luck with his 2917-19-38. I think they should pull the 30s nicely. I also have a 1.5 rudder to bolt on. Was going to run Sunday in Eugene, but it going to be 110 degree. F... that. No AC in my car with a 4hr drive after spending the whole day in the sun. NOPE
Mikey,
When you ever going to finish that sp20?????
Yes they did. Still not done. Need some new props. I think they are too beefy. Going from 3016-20-50 to 3017-19-38. Mark is having good luck with his 2917-19-38. I think they should pull the 30s nicely. I also have a 1.5 rudder to bolt on. Was going to run Sunday in Eugene, but it going to be 110 degree. F... that. No AC in my car with a 4hr drive after spending the whole day in the sun. NOPE
Mikey,
When you ever going to finish that sp20?????
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Bad **s boat Mike! Good luck with exorcising the gremlins!
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Mike
I am running 3017-19-38s. Spins them up good. Got the new fin cut out tonight. Will sharpen and bend tomorrow. We need to go testing. I have a chase boat.
Mark
I am running 3017-19-38s. Spins them up good. Got the new fin cut out tonight. Will sharpen and bend tomorrow. We need to go testing. I have a chase boat.
Mark
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How about the 3rd?
eagletwin90
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Great looking build Mike
boat looks fantastic in those colors
Love the blue.
James
boat looks fantastic in those colors
Love the blue.
James
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Just got back from the pond. the boats are working great. We need to make some minor changes to them. Marks fin needs a little more bend in it. I need to work on keeping the struts from moving. The right one tilts forward and start to bind up some. I also need a non trip wedge added to my left outside sponson. It is tripping sometimes. They both are strolling with the 3017-19-38 on. I had some spark plug issue in the middle of testing. Just ordered a bunch more so I can replace them when needed. These twins are ready. Cant say the same for my nitro. It is doing weird **** that has me and Mark scratching our heads. Done with it. Oh yeah. we got Fuzzies A stk lynx figure out too. It was a pack of 3 for that boat. Too cold of a plug, bad fuel, and waded up cable. Worst was the used fuel. It now going to be weed killer.
Mike
Mike
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Mike, looking at the bottom of your sponsons, it looks like you use a ride pad or "shingle" that is wider than the body of the sponson.
Could the edge of the shingle be tripping it ?
would cutting it flush with the side of the sponson cure it ?
not sure I understand fully what tripping is unless it's digging in the water unexpectedly in the turn ??
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A trio of twins tested today. Funny how small the twin 80 boat looks. Looking forward to racing these things in September! For boats that were an idea a few months ago, I am more then pleased how they are working out. Mike and I do things a bit different, but both boats are working well. Don Maher, Mark Bullard, and Brian Buass have helped out a ton with this project answering all of my dumb questions. Mike is a rigger guy, it has been 30 years since I designed one. That was a three point 40 boat. This is new ground for me. Going to start on a new one soon. I have more ideas.
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Frank you nailed it. Mike is going to bring the non trip down closer to the running surface. It never really trips over, but it is catching at times. I am not a fan of overhang on the outside of the left sponson.
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Nicely done guys!! Been following the builds and it's nice to see you guys hitting the water and getting good results!!
As much as I love nitro, I believe we are staring square into the face of future twin rigger racing hulls right here.
The larger scale of the hulls combined with the ease of running gas engines, (not to even mention the nitro motor availability situation now) is going to push a lot of people to start building and running boats like these...
Racing will improve as reliable boats finish more heats and hopefully bring back the fun of driving in close races with more than 3 boats..
