Ragnarok - 65M Trimaran
 

Good news, finally the first hull set of my fiber glass Tri RT65 is off the moulds.

http://www.rcsails.com/build/ragnarok.jpg

More pictures can be found on my site.

I will describe the assembly in this new thread, the build log of the prototype can be found here

http://www.rcuniverse.com/forum/m_8747898/tm.htm


Happy Sailing:D

RE: Ragnarok - 65M Trimaran
 

Holy cow!! theres no stopping you Sirit, you on fire??, incredibly fast first build from moulds.

Really good looking Tri BTW.

Gary

RE: Ragnarok - 65M Trimaran
 

YESSSS!!!

- This man is really able to ROCK the world of RC-Models!
It is a pleasure to have you with us!

Happy sailing

Idealist

RE: Ragnarok - 65M Trimaran
 

Phancita,

Awesome work. The finished hulls look good. Have you had chance to sail one of the first moulds yet? I'm sure that they will be able to out sail the prototypes. Can I ask what weight of glass you used in the layup? Are there internal bulkheads installed for the radio/servos/fin? Are you going to fabricate any in carbon fibre/epoxy?

TBK

RE: Ragnarok - 65M Trimaran
 

@ Gary
the picture shows the tri parts just lifted off the moulds - I have not started the build yet.

@TBK
thanks, I wish you luck with your RT65.
I have not sailed the glass boats already - like always can't wait and have started the build already.
I used two layers of 125g/sqm glass and do not plan to do them in carbon - would be not much gain in weight because of the small size.


Happy Sailing:D

RE: Ragnarok - 65M Trimaran
 

1. Keel box
Take the carbon keel molding, wrap with 6 or 7 layers of cling film and lubricate with mold release wax or petroleum jelly.
Cut 3 pieces of glass cloth (100g/sqm – 200g/sqm) to rectangles 20 by 12 cm and laminate with epoxy resin on a flat surface.
Fold the wet laminate around the leading edge of the keel and clamp behind trailing edge. You can add a layer of peel ply to get a smooth surface.
Wait until the resin has cured, then gently remove the keel and discard the cling film. Trim the ends of the keel box. The keel box exactly fitting your keel is ready to laminate into the main hull now.

RE: Ragnarok - 65M Trimaran
 

2. Main Hull Assembly
Take the main hull and mark the centerline. Measure the location for the keel and the rudder along the center line of the hull according to the plans.



Carefully drill and cut the holes for keel and rudder shaft.


Prepare the keel with mold release wax,insert it into the slot in the hull and slide the keel box onto the keel from inside the hull. The keel box should extend about one inch above the hull.




Level the main hull to waterline and beam then fix it in this position. Now level the keel according the plans and laminate the keel box into the main hull with two layers of 1 inch wide 100g/sqm glass tape.
Level the hull can be best done in a sort of cradle or a boat stand, the keel can be locked in position with masking tape.
Wait until the resin has cured and remove the keel fin with gentle force.




Today I will install mast tube and rudder

RE: Ragnarok - 65M Trimaran
 

thanks for a good thread Sirit, nice to see a project in from start to launching.
Take plenty of photo's and keep em coming.
deano</p>

RE: Ragnarok - 65M Trimaran
 

Mast tube installation:
The mast tube depends on the rig you intend to use. The RT65/RT65R kit comes without rig and sails, you can build a rig according to the sketches included with the plans or use an existing RG65 rig for the boat.
The mast position the mast rake of 5° according to the plan is important.

Take the mast tube of your choice and fix it direct in front of the keel box aligned with 5° rake and 90° to beam according to the plans, exactly in line with the keel with the help of a 5° balsa wedge and some cyano glue. Now laminate the mast tube to the keel box with 2 layers of two inch wide 100g/sqm glass tape and epoxy resin.
Double check alignment and allow the resin to cure.

RE: Ragnarok - 65M Trimaran
 

Rudder tube installation:
Sand and clean the inside of the main hull around the hole for the rudder.
Take the rudder and the supplied brass tube out of the box and thoroughly clean and sand the brass tube. Clean the rudder shaft from resin residues and test fit the brass tube, it should slide on smooth. Prepare the rudder shaft with mold release wax, slide the rudder shaft into the hull from outside and slide the brass tube onto the shaft from inside hull. Secure the brass tube on the shaft with masking tape. Now align the rudder with the keel according to plan and glue the brass tube to the main hull with epoxy. Double check alignment and allow the resin to cure.

RE: Ragnarok - 65M Trimaran
 

Nice work Sirit, keep it coming.

Gary

RE: Ragnarok - 65M Trimaran
 

Servo tray installation:
Cut the servo tray from a piece of 3mm ply wood according to the template supplied with the kit. Test fit your servos.


Now mark the hole for the mast tube on the main hull deck. Carefully drill the hole and test fit the deck, with the servo tray laid in, the rudder tube protruding the tray about 5mm level to water line. Sand the edges of the servo tray down until smooth fit without deforming the hull.
Glue the tray to the hull with epoxy, temporary tape the deck to the hull to ensure that the hull does not get deformed.


Next I will assemble deck and main hull

RE: Ragnarok - 65M Trimaran
 

Assembly of main hull and deck:
Mark the position of the access hatches and the sheeting guide according to the template provided.

Cut the hatches carefully.

Prepare the hull for glueing together:
Sand the joining surfaces thoroughly to remove mold release residues and ensure the epoxy sticks to them well
Use foam tape to increase glueing surface at the joints where no joining surfaces are provided . These joints are the keelbox and mast tube, the bow and the transom.



Tape the hull and deck with masking tape to avoid resin spills stick to the hull.
Apply epoxy to all joints and assemble the two parts. Secure the joints by taping in position with masking tape. Allow the resin to cure and remove the masking tape.



Trim and filler the joints and sand the hull with 400grit sand paper. Your hull is ready for the paint job now.



Next I will assemble the floats

RE: Ragnarok - 65M Trimaran
 

Float Assembly
Test fit the hulls and decks and make them fit properly by sanding off protruding parts.


Tape the hulls and decks of both floats with masking tape to prevent resin spills stick to the hulls.
Sand the joining surfaces like you have done with the main hull and enlarge the joint surface at bow and transom by sticking some foam tape to them.
Apply epoxy to the joints and assemble the floats. Fix the joints in position by taping with masking tape. Allow the resin to cure and remove the masking tape.


Trim and filler the joints and sand the floats with 400grit sand paper. Your floats are ready for the paint job now.


Next I will install the carbon tube beams and RC equipment

RE: Ragnarok - 65M Trimaran
 

Beam Assembly
Take the 6mm carbon tubes out of the box and insert into the holes in the main hull. Now stick the other end of the tubes into the holes of the floats. Align the three hulls to be parallel, the centerline of the main hull 280 mm apart from the centerline of float centerlines left and right. Mark the positions and glue the tubes into position with epoxy resin. Double check alignment and allow to cure.


Your Trimaran is now ready to install your rc equipment and rig.

RE: Ragnarok - 65M Trimaran
 

RC Installation
There is plenty of room to stow batteries and receiver, the servos go to the precut slots in the tray. I use a standard size standard servo with a 35mm arm for the sheets and a mini servo for the rudder. Install the batteries as far aft as possible to ensure CG at about 240mm from transom.


The Tri is ready to rig now

RE: Ragnarok - 65M Trimaran
 

My Ragnarok RT65 ready to sail


Video clips of the launch and free self building plans can be found at http://www.rcsails.com/rt65/htm

RE: Ragnarok - 65M Trimaran
 

Great work. The new boats look really good. Only thing I couldn't see in your photos was how/where the radio and batteries were placed. I'm sure that this is detailed in your plans, but not obvious from the photos. Given the very light weight of the overall boat itself, placement of the battery pack (heaviest single part) could have a dramatic impact on performance. Any details you can share??

TBK

RE: Ragnarok - 65M Trimaran
 

Dear TBK,
I have placed my receiver besides the arm winch and the batteries in transom below the rudder servo. I use a 5-pack of AAA NiMH batteries. With this setup I get the center of gravity at about 240mm from transom.

I hope this helps you.
BTW have you started to build one of the little ones already?

Phanchita

RE: Ragnarok - 65M Trimaran
 

Thanks Phanchita

I hope to get started building one of these within a couple of weeks. I'll post some pics as I go through the build. Still having too much fun sailing my Nightmares min 40's.

TBK