Topic: Bobby Police Launch (Read 24137 times)

escipion · « **on:** April 13, 2015, 06:41:57 pm »

Hi Guys!!!!
I decided to start a new project, a Bobby Police Launch, the plans are for free in the net, it is a simple design, but my objective is to make her with no wood, I’m using expanded PVC (known as sintra too) and styrene. The plan mark that she should be built with balsa wood, most of them ¼”, the PVC is about 1/8”, so I’ll have to glue two layers.
The original plans was inside the July 1977 Model Boats Magazine, to print them I had to reduce to 30% the archive

Best regards

escipion · « **Reply #1 on:** April 13, 2015, 06:45:34 pm »

Hello!!!
Here you can find the plan, sorry, it was too heavy, didn't let me insert it

http://www.rcgroups.com/forums/showthread.php?t=1435002&page=4&highlight=bobby#post19783234

Best regards

roycv · « **Reply #2 on:** April 13, 2015, 06:57:20 pm »

Hi, I built two many years ago, the remaining one has a brushless motor and goes very well!
regards Roy

TheLongBuild · « **Reply #3 on:** April 13, 2015, 07:06:49 pm »

Welcome to the Bobby appreciation society

first rc boat I built..

escipion · « **Reply #4 on:** April 14, 2015, 03:37:27 pm »

Hello!!!!
Thank you guys for your comments
The next step was to make and install the keel (it is in two parts), these are made with PVC, then made the hole for the prop tube, by now I’m gluing both sides of the boat, this is with styrene
Best regards

escipion · « **Reply #5 on:** April 15, 2015, 03:53:26 pm »

Hello!!!!
The next thing was to install the propeller tube, I had a Robbe shaft and tube stored in a drawer that fit all right

escipion · « **Reply #6 on:** April 15, 2015, 03:57:44 pm »

Hello!!!
Next was to made and install the knees under the chine, the plan marks that those should be of 1/4", but decided not to use two layers of PVC

Best regards
.

escipion · « **Reply #7 on:** April 17, 2015, 12:51:30 am »

Hi Guys!!!
By now I build the bottom of the hull, this is made with styrene, made it a little larger then trim it

escipion · « **Reply #8 on:** April 20, 2015, 04:22:46 pm »

Hello!!!
After ending the bottom of the hull, I noticed that the expanded PVC use to keep all the scratches, even if you make them with the nail., my intention was to let it in the deck because of his texture, but I found out this inconvenience and already have some little scratches, so decided to use a thin styrene that I have in stock.

Best regards

escipion · « **Reply #9 on:** April 20, 2015, 04:25:24 pm »

After installing the new cover of the deck I made and installed a couple of belts in the hull

escipion · « **Reply #10 on:** April 20, 2015, 04:27:19 pm »

And began making the cabin

Best regards

escipion · « **Reply #11 on:** April 21, 2015, 05:21:55 pm »

Hello!!!!
Other think I made was the ruder, it's all made with brass and a little tin solder.
I made it as the plan said, but I'm feeling it's a little small

, what's your experience guys???

Best regards

TheLongBuild · « **Reply #12 on:** April 21, 2015, 05:40:49 pm »

I think possibly a bit bigger.

Netleyned · « **Reply #13 on:** April 21, 2015, 05:56:20 pm »

Make the rudder longer to line up with the lower edge of the prop.
A little wider would be OK too.

Ned

escipion · « **Reply #14 on:** April 21, 2015, 10:10:56 pm »

Ok, thank you guys

I will do it again with your advices

Best regards

TheLongBuild · « **Reply #15 on:** April 21, 2015, 10:15:00 pm »

Have found mine, I will do a water test tomorrow to give you an idea on the water level.

escipion · « **Reply #16 on:** April 22, 2015, 03:41:25 pm »

Wooow, thank you very much, maybe this weekend I'll begin painting the hull

Best regards

escipion · « **Reply #17 on:** April 27, 2015, 02:52:56 am »

Hello!!!
Hope you all are fine
By now I´m building the main cabin, decided to use more formers in the center cabin, they all are made with PVC, the cabin is styrene

Best regards

escipion · « **Reply #18 on:** April 28, 2015, 04:59:53 pm »

Hello!!!
By now I'm working on the cabins roof, as I'm using styrene it's a little difficult to glue it because of the rigidity of the material, I was thinking about using a thinner material but the one I have is too much thin and don't want to buy a new canvas, so I had the idea to use a couple of small presses through the width size in order to bend the material as was needed then glue it. As I only have two presses needed to do it by segments

Best regards

escipion · « **Reply #19 on:** April 30, 2015, 10:33:46 pm »

Hello!!!!!
The next thing I did was the front of the cabin, Don't know you guys, but I made as the plans said and the sides didn't fit anywhere

, I had to do it again, first I made it with cardboard a little bit bigger and show it up to the rest of the cabin to in order to give it the needed size, at the end everything fits all right

Best regards

escipion · « **Reply #20 on:** May 04, 2015, 06:10:27 pm »

Hello!!!
The next thing I did was the cabin roof, the same way as the rest of the cabin, had to use the two presses, at the end I let it a small sun shade in the front
I even installed the belt that goes around the cabin

Best regards

TheLongBuild · « **Reply #21 on:** May 04, 2015, 08:13:31 pm »

Hi

Build looking good

You asked about water line etc, these are some pictures I took with all the gear I use in the boat..

Also a shot of the rudder for reference..

escipion · « **Reply #22 on:** May 04, 2015, 10:47:14 pm »

Wooow, thank you very much for those pictures

, now I can see where the water nine goes, even the size of the ruder and some details that need to be done

I'm extremely grateful
Best regards

roycv · « **Reply #23 on:** May 05, 2015, 01:13:36 pm »

Hi escipion, no picture but I fitted a 3mm x 3mm. spray rail starting 6cm down from the bow and arriving at the lowest level of the hull at 23 cms from bow, continuing to the stern, it also protects the corners.
The waterline follows this down (it is curved) lower hull colour below this spray rail. Then I continued the waterline at about 6cm down from deck.
If your boat is fast you will benefit from a spray rail.
Sorry noy replied before but I have been on holiday.
regards Roy

escipion · « **Reply #24 on:** May 05, 2015, 05:11:27 pm »

Thank you very much Roy, really appreciate all the information

.
I was thinking about using a spray rail in the top of the hull to protect her, but you have an interesting idea.
I'm planing using a speed 400 electric motor, don't know how fast she will run. Other problem is that my little daughter (6 years old) is telling everybody that it's going to be her boat

, so maybe I'll try not to do a fast boat and think about putting both spray rails. I´ll keep in mind the distance of the waterline that you are telling me

I'm extremely grateful
Best regards

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Author Topic: Bobby Police Launch (Read 24137 times)