Billing Boats - Slo-mo-shun IVPosted by xilsoe Jan 19, 2012 19:29:59
A few pictures of the progress on painting the new figure for Slo-mo-shun IV. It will probably be some time before he can race the boat...
Billing Boats - Slo-mo-shun IVPosted by xilsoe Dec 12, 2011 14:27:22
After a few days I managed to mount the new rudder. At first I had to remove the old rudder. Not too hard except that the mounting screws weren't too good. Then I needed to find some new mounting screws. After seeing the screws I decided to go for some stainless steel 3mm wood screws. That proved hard to find and obtain, so I ended up buying some 3mm X 18mm self tapping titanium screws. They will not rust.
The new rudder only takes two mounting screws and at a different hole distance from the old rudder. This meant I needed to fill out 3 of the old screw holes. That was done with a medical needle and some epoxy so I could fill the screw holes from deep within.
Then after letting the epoxy set for 2 days, the mount surface had to be flattened and painted. Needle files were used for flattening and Humbrol no. 191 was used for paint.
After two layers of paint the rudder was ready to be mounted. That was actually quite easy. At first I made sure that the remaining screw hole was big enough for the new screw. That was done with a 2mm drill. Then I secured the mount bracket with one screw in that hole. With the first screw and the mount bracket in place, I drilled a hole for the second screw and secured that screw so the bracket was in place.
Then it was just a matter of putting the rudder on the bracket.See the pictures below for illustration.
As can be seen in the pictures, I also started painting the driver. I am not in a hurry to get the driver ready. The boat will run fine without the driver, if the driver isn't ready for the launch.
The next thing to do will be to stabilize the rudder push rod inside the hull. This rod has become rather long after I moved the servo towards the bow.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Dec 02, 2011 20:01:54
Yesterday my e-bay rudder arrived. I had noticed that there was a drive dog set on the pictures, but thought this was not included. It was included! and it was for an M4 propeller shaft! So now I have two dog drives and prop nuts
All of the parts seem top quality. The rudder seem light as I was hoping it would be but fearing it wouldn't. It seems adjustable in all the ways I could want. The only shortcoming seems to be that the lower screw is metal instead of Nylon. I would want the screw to be nylon so this would be the break point in case the rudder hits something so I'll probably replace that screw.
Another improvement would be to sharpen the leading edge to reduce drag.
Here are some pictures:
Now I'll look into getting it mounted.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Nov 19, 2011 15:42:26
I finally got to make the new servo installation in my Slo-mo-tion IV. I made it in a way so it is rather easy to remove the servo if needed. I guess this is based on experience. I have learned that these kind of things should be accessible and replaceable for easy maintenance.
Here are some pictures of the servo installation:
I tried installing a 1,5mm brass rod to control the rudder. It seems that turning left will be OK, whereas turning right isn't OK. The rudder installation will block the servo when turning right.
I also noticed that the new propeller will be further back and may interfere with the rudder. For this reason I ordered a new rudder. The new rudder has water pick-up for cooling. At first I won't be using that. If it proves that the current pick-up won't work, I'll look into using the water pick-up in the rudder instead.
To make a better weight distribution I have decided that the ESC will be placed in front of the motor. I haven't started looking into that yet, but I know I'll need to remove the motor to get the ESC in that position.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Nov 17, 2011 18:29:16
Today the e-bay drive dog and nut finally arrived along with some Teflon 4mm washers.
The parts looks fine, but I will have to adapt either the drive dog or the propeller. See the pictures below. My preference is to modify the prop as it has more material to give from.
The drive dog needs a bit more shaft so I will need a new prop shaft.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Nov 13, 2011 11:45:58
As I may have stated before, I am trying to move the centre of gravity forward in my Slo-mo-shun IV. The first project is to move servo further ahead, so I am making a new servo mount.
I also started working on my new figure. So far not much has happened except gluing and and filling. The figure also features a set of racing goggles that I didn't make a photo of.
I don't know how high the figure will need to be yet so there is no point in trying to extend the body yet.
Here are some pictures of it all:
Billing Boats - Slo-mo-shun IVPosted by xilsoe Oct 29, 2011 14:38:16
Yesterday and today some new parts for my Slo-mo-shun IV arrived. Among those is a new propeller. It is a 35mm pitch 1,4 brass propeller. And as always these things need sharpening, balancing and polishing. The prop has a 4mm bore and needs a drive dog. This means that I will be looking for some way to mount the prop. Perhaps a spare shaft is the easiest way ahead?
The prop wasn't hard to balance so I like it so far. Performance wise I'll wait until May when the outdoor model boat season starts.
I also received a new figure that I'll intend to use as driver. It's a 1/12 scale racing pilot by the Williams brothers. It is shown in the pictures above. That was the best thing I could find after Bernhard made me aware of how wrong the current driver was looking.
Besides that I received some hardware I intend to use for mounting rudder servo in the new place I have decided for.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Oct 13, 2011 17:41:38
To change the centre of gravity on Slo.mo-shun IV, I have decided to move the RC components further towards the bow. The rudder servo and the ESC will be moving forward as may the receiver do. So far I have removed these components. Besides that I removed some of the balsa that was placed under the hood.
Here are some pictures:
Thanks for looking