31" Catamaran Scratch Build - Fireball
IMG_3080.jpgIMG_3084.jpgIMG_3123.jpgIMG_3171.jpgNew here to OSE, want to start out by thanking everyone out there who shares his or her knowledge and experience. We decided to take up a new hobby back in March when quarantine had us stuck at home so we started building our first ever RC boat. My 11yr son and 10yr daughter did most of the work. Used some of the rough outline plans found online (honestly can't even remember where we found them but they were more of a guide specific plans to follow). Now after about 3 months the boat is running!
We decided to 3D print the structural cross members in ABS plastic which offered a good opportunity for the kids to do some design work and use a 3D printer. The rest of it is mostly plywood 1/32" and 1/16" thick ordered online from an RC airplane shop. The hatch cover is 3D printed in PETG in two pieces and glued together. We followed a lot of the recommendations on OSE forums for Z-poxy coating, stuffing tubes, etc. I don't think we could have done it without SIG-MENT glue - that stuff is good, we give it 5 stars.
Most of the hardware components we purchased from the OSE Shop which we are very impressed with. We may have cheaped out little too much on the ESC/Motor but they are running well so far. We are using a Traxxas radio and transmitter (since we already have a Traxxas truck we can use it for both). My daughter designed the hull paint job and then masked and painted the flames with an airbrush herself. They named the boat Fireball.
Some trial and error we seem to have a decently fast boat that is tons of fun. When it planes up on the water it moves!
We plan to add an external whip mast for the antenna as the range is currently more limited than it should be. We are new to LiPo batteries - suggestion for anyone else out there also not familiar with LiPos read a lot about them before using and check both ESC and charger settings. If we did it over again we would have increased the hull width between the sponsons to better accommodate all the stuff inside.
Here are some videos:
https://youtu.be/Nw9YT8JDCHQ
https://youtu.be/wsw7nBFcfvs
Here is a component list from the build:
ose-83347 OSE Dual pickup rudder assembly
SPDS-007-187MR .187 Mono Speedmaster Large 3/16" (.187) Strut
oct-ocfhe1815 Octura Coupler Flex Hex 1/8" to .150 Cable
grp-2317.40 Graupner K Series 40mm
ose-80200-b Fiberglass, Water cooled heavy duty motor mount for 36mm motors
pow-arm-25t Power HD Aluminum Metal Arm D, 25T Black Servo Arm
ose-cable-150L OSE .150 cable with 3/16" prop shaft 2.25" long
ose-83389 OSE 4 Piece Hatch Bolt and Nut set
hh-tkr5126 Tekno RC Antenna Tube Universal w/Caps (5)
hh-4-40-3753 Great Planes 4-40 Linkage Rod
ks-brass-tb-12 K&S Brass Tubing 12" long (305mm)
ose-80895 OSE Aluminum Small Water Outlet
ose-tubing-7/32-clear OSE Medium 7/32" Silicone Tubing
pow-arm-25t Power HD Aluminum Metal Arm D, 25T Servo Arm
Traxxas Receiver Micro TQ 2.4GHz (3CH) TRA6519
Traxxas Waterproof Digital High Torque Servo TRA2075
GoolRC Waterproof Brushless Motor 3650 3900KV 60A ESC Combo
Youme Li-Po 2S 7.4V 6200mAh 50C
The kids are getting excited for another build, maybe a V hull - any recommendations on some V hull plans to reference?
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