Billing Boats - Slo-mo-shun IVPosted by xilsoe Jul 05, 2012 17:58:07 Last Sunday I brought Slo-mo-shun IV to the model boat pond to try out the hull modification and to try recording some video with one of my 808 #16 spy cameras.
I think the hull modification works really well. The oat seems to stick better to the water with the bow. Perhaps the propeller also contributed to this. I was running with a Graupner 34,5mm 1,4pitch hydro propeller.
Now it seems that motor temperature is an issue. To try to solve this I intend to try out some motors with lower kV ratings. The current motor is rated at 1600kV. A new motor will be a winter project. Instead I might try some more hull modifications.
The camera was placed in a Tic-Tac box I made for my Sea Wolf. On the Sea Wolf I seal the Tic-Tac box with Vaseline. I hadn't sealed with Vaseline last Sunday because I wasn't expecting water ingress when used on the surface. When I got home, I did however find some water inside the Tic-Tac box. So when using the camera on Slo-mo-shun IV, the Tic-Tac box should be sealed with Vaseline.
Video (Cut down from 36 minutes):
As there is no display on the camera, I didn't know what I was filming before I downloaded the video to my computer. Next time I will point the camera a little more downwards. Hopefully this will give a better sensation of speed
Billing Boats - Slo-mo-shun IVPosted by xilsoe Jun 24, 2012 13:01:51 Recently I bought some 808 #16 cameras. For this reason I have decided to put one of the cameras on Slo-mo-shun IV to see what videos that will give. The way I figured I would do that was by putting some Velcro in the driver's position and make a foam camera mount. This can be seen on some of the pictures below.
Last Sunday I brought Slo-mo-shun IV to the model boat pond to try out the modifications I have made throughout the winter. It seems that the balance in the boat has become better. It is still a bit jumpy to my taste. I am however not sure whether I'll be able to move more weight forward so for now I'll leave the weight distribution as it is.
Instead I decided to carry out an experiment with what I understand as the front lower spoiler. I have added two pieces of polystyrene to make the rear edge of the spoiler sharp and to form a cavity in front of the vertical rear wall of the spoiler. This can also be seen in the pictures below.
When I was at the pond I also tried out a Prop-shop propeller for what I believe is a cleaver/hydro propeller. Bernhard had it along. As far as I recall it was a 3 bladed 4217 propeller. That made the boat really fast, but it also made the motor really hot. So that prop/motor combination don't match too well. For this reason I am begining to think that I should be looking for a lower kV rated motor or learn how to wind a brushless motor myself, so I can modify the motor performance.
PS: I also went to the pond today. As one can see in some of the pictures, the boat became more wet on the top, than on the bottom
Billing Boats - Slo-mo-shun IVPosted by xilsoe Jun 15, 2012 21:47:28 Surfing youtube the other day I came across this video of Slo-mo-shun IV being moved. I find it shows some details I have not seen in any other videos or pictures. Some of the interesting details are the skid fin and the entire left hand side.
Billing Boats - Slo-mo-shun IVPosted by xilsoe May 05, 2012 19:29:57 Today my goods from prop-shop arrived as I mentioned in my previous post regarding PT-15 Japan Torpedo Boat. Along with the parts for PT-15, I also ordered a new propeller and a drive shaft for my Slo-mo-shun IV.
The propeller specifications are ø: 35mm, 3 bladed, pitch 1.4 in stainless steel.
Billing Boats - Slo-mo-shun IVPosted by xilsoe Mar 25, 2012 19:27:18 To further improve the balance in my Slo-mo-shun IV I decided to move the ESC in front of the motor. This means that the ESC will not be easily accessible. Hopefully I won't need to access it a lot. It took me some hours to install it there. Maja helped me out as her hands are smaller than mine.
This means that Slo-mo is prepared to run again. I am however waiting for a new shaft and propeller from prop-shop, but that's not really necessary just to run.
A few pictures of the new RC installation in Slo-mo: