R/C Naval Combat

Here's the start of my Mogador build thread. No pics yet but I'll get some up as it progresses.

Over the weekend I drew-in the frame locations and my target waterline which is about 1/4" higher than the design WL on the plans. Last night I floated the hull weighted to the target WL and measured the result this morning at 3.2 pounds so that's my target build weight. So far my components are coming in at a bit under 3 pounds so I may be able to meet the 3.2 pounds. If not, the rules allow an extra 1 pound over the heavy displacement which gives me a little over a pound to play with.

This week I'll be installing the sub-deck by laminating with basswood strips and Goop.

FYI, the bare BC Mogador hull weighed in at 1.15 pounds.

Steve

Scale model weight for Moggy is like 3.52, max model weight is 4.87. I wonder how deep she'd sit at scale weight? No rule about minimum weight, just interesting. I am certain you can make your desired weight, it's not that hard if you have a lightweight regulator.

I have found it much easier to make the lightweight DDs using 1/16" bass or ply for the decks and ribs, doubling or tripling the ribs to make them thicker on the edges where the balsa attaches. 

I've got a Genuine Innovations 32gram composite regulator shipping in from the UK.  It’s been looked at before on this site and had an issue that I think I can work through (leakage by the puncture seal).  Funny thing, I can get a product produced in the USA cheaper from the UK (including shipping) than I can get from the manufacturer.

http://www.reallyquiteuseful.co.uk/composite-regulator-from-innovations.html

First pics. These show the sub-deck being laminated in. The strips are 1/8" x 1/4" basswood and will be cut/sanded flush to the deck edge. One of my limitations on this project is no odors in the house so this part is being done in a store room at work as the E-6000 adhesive is solvent based. The location also provides an unlimited supply of lamination clamps!

Steve

I appreciate the comment on my "mad-crazy-good wood working skills" but unfortunately I currently do not have access to my shop or tools. My wife and I are giving city-living a try and are in a condo on the DC line. The shop (and the house in front of it) has been rented out and all my beloved stationary power tools are in storage or sold off. This Moggy build is going to be relatively tool free except for what shop time I can grab from Frank or Marty on Friday nights. Most of the build will be on a pull out craft table I ordered from Walmart (aka, a sewing table) and a collection of hand tools. Should be fun!

This BC Moggy hull is thick on the ends but thin in the middle (1/16").  I'm debating whether to back the ribs with reinforcement, especially since it appears to made from only spray-chop.

Steve

I think 1/4" is more than enough. The BB has to be able to go completely through the hull skin.

When I build a wood ship, I tend to go with 3/8" wide ribs which sets the internal armor back 3/8".  On fiberglass hulls, I use 1/4" square stock to back the ribs.

Must be on the same wavelength. I bought the 1/16" aluminum last week.  Since it's a tried and true method I'll move ahead with it.

Steve

Hull structure build on the Tyng Mogador continues:

Laminated subdeck is cut/planned/sanded to the deck edge.

Midships frame is installed.

First look at the 30mm Pro Boats props.

Testing drive motors in the rig.

More to come...

Posted By Steve Tyng on 10 Jan 2011 01:39 PM
You mean everybody doesn't measure thrust? ;-)

Yeah a lot of people don't for some reason, I dont understand why.  It's simple to do and it it gives you some good information for system design/optimization.  Now if only the stupid chipmunks and field mice would stop jumping into my test tank.....we've got us a floater....