Search found 106 matches

by mcmbuilder
Sat Jan 31, 2015 7:37 pm
Forum: Metal
Topic: Welding terms and technique
Replies: 5
Views: 3459

Re: Welding terms and technique

Unless a person is a very seasoned professional welder then they should avoid "whipping" with MIG wire. If you do it in a manner that changes the stick out enough to change the amperage input or interrupts the shielding gas coverage it will trap gases and form porosity. If you are doing so to get a ...
by mcmbuilder
Mon Jun 23, 2014 1:51 pm
Forum: Metal
Topic: Powder Coat or Hard Anodized
Replies: 3
Views: 3142

Re: Powder Coat or Hard Anodized

Uncoated aluminum will last a long time but it will eventually start to corrode and look like crap. Powder coating is tougher than anodized. If you can get a small enough amount to do the job you can also use awl-grip paint. Make sure you do all the prep work and it will last a long time.
by mcmbuilder
Sun Apr 28, 2013 7:05 am
Forum: Metal
Topic: 19.5 foot Rogue Runner
Replies: 26
Views: 11926

Re: 19.5 foot Rogue Runner

Looking good. If you have not done so, I would reccommend you weld up the scored length. Even though the boat has plenty of tranverse and longitudial members the very bottom is going to be a high stress point. With a 1/16" of material taken out you have a place a crack can get started and propogate ...
by mcmbuilder
Sun Apr 21, 2013 6:59 am
Forum: Metal
Topic: 19.5 foot Rogue Runner
Replies: 26
Views: 11926

Re: 19.5 foot Rogue Runner

Looking good so far........ Just a question about design. I know boats are often designed for the area and waterway they will be operating in, but I have never understood the blunt type many of the "sled" style boats employ. WHat is the purpose of the design. I have thought about building a similiar...
by mcmbuilder
Wed Apr 17, 2013 6:10 pm
Forum: Metal
Topic: Norwester
Replies: 15
Views: 6600

Re: Norwester

Most 450-600amps machines will be 3ph power. Make sure you have it available before making the purchase. Even if it available to you, if it is not already ran into your shop it will be fairly expensive to get it hooked up.
by mcmbuilder
Fri Apr 05, 2013 10:33 pm
Forum: Metal
Topic: Norwester
Replies: 15
Views: 6600

Re: Norwester

You are not really going to have a lot of issues with the distoration using 1/4" plate. EIther process would do a good job but with either I will second what Kevin said and really encourage you to go get some training. Most schools will let you just take the training session you need and not have to...
by mcmbuilder
Thu Feb 14, 2013 8:26 pm
Forum: Metal
Topic: Aluminum cost ..$$$
Replies: 15
Views: 13702

Re: Aluminum cost ..$$$

If you are lucky enough to be in an area covered by Eastern Metal Supply you can get 5052 plate for about $1.65/lb. I just ordered about $1000.00 of plates and extrusions. Two 5' X 16' X .125 5052 plates weighing 140lb ea. cost me $440.00 They are routinely 30-40% cheaper than any other vendor I dea...
by mcmbuilder
Sun Feb 10, 2013 7:59 pm
Forum: Design Modifications
Topic: wildcat performance ?
Replies: 3
Views: 2166

Re: wildcat performance ?

I have posted this in all of those forums. Yet to have an answer. In the plans section there is a photograph gallery for each of the plans. At one time there was an aluminum wildcat built by someone at a marina on a large lake out west somewhere. I tried to contact the owner several times to inquire...
by mcmbuilder
Sun Feb 10, 2013 8:21 am
Forum: Design Modifications
Topic: wildcat performance ?
Replies: 3
Views: 2166

Re: wildcat performance ?

Just resurrecting this question. Really wanting to build this boat but would like some feed back on performance before proceeding.
by mcmbuilder
Sat Oct 20, 2012 6:25 pm
Forum: Metal
Topic: Welding panels before or after?
Replies: 5
Views: 4890

Re: Welding panels before or after?

If you do have to weld any full length panels together you will better off to use some type of stiffeners on the back side or weld them to the frames first. If those options are not practical then be sure to leave a gap between the plates (~.125), and stagger the welds, otherwise you will have huge ...
by mcmbuilder
Wed Sep 05, 2012 1:24 pm
Forum: Metal
Topic: Building a "Sweet 16" in steel ... thoughts ?
Replies: 11
Views: 6563

Re: Building a "Sweet 16" in steel ... thoughts ?

I am with Kevin on this. When I built my first boat I had spent years welding in nukes, refineries, chem plants, power plants welding all types of carbon, stainless and aluminum pipe. Had even been teaching welding for about 5 years. To this day I would love to buy my first few boats back and sell t...
by mcmbuilder
Thu Aug 09, 2012 7:05 pm
Forum: Metal
Topic: mig welders
Replies: 2
Views: 2184

Re: mig welders

Keep your eyes on craigslist and even ebay. I recently saw a Lincoln PowerMig 275 with a 1lb spool gun for $1750.00 on craigslist. I have seen Millermatic 250s with the XA spool gun for $1500.00. Even though the 250 is an older model it is still a tough excellent welding machine,, I like it a lot be...
by mcmbuilder
Wed Aug 08, 2012 8:00 am
Forum: Metal
Topic: Aluminum cost ..$$$
Replies: 15
Views: 13702

Re: Aluminum cost ..$$$

I presume with a drift boat you are building a freshwater boat? Another option would be to use 5052. Usually about 30% cheaper than 5084 stuff. I have a pile of freshwater boats I have built using 5052 and have never had any issues as far as strength of hull, or corrosion.
by mcmbuilder
Mon Aug 06, 2012 9:06 pm
Forum: Metal
Topic: Aluminum Pram question
Replies: 1
Views: 1833

Re: Aluminum Pram question

Not real familiar with the style of boat you have but I assume it is a flat bottom boat. If so the easiest one is to take angle iron and weld it to the bottom. Turn it so the corner is pointed down and weld both flanges to the bottom. Do not weld it solid but about 4" on every 12", staggering the we...
by mcmbuilder
Sat Aug 04, 2012 2:22 pm
Forum: Metal
Topic: How to keep a raw aluminum outer hull looking good?
Replies: 5
Views: 4019

Re: How to keep a raw aluminum outer hull looking good?

See, I told you he is very sharp on this kind of stuff.