P offshore scratch cat build thread

[Jesse J]

Well, so still not done, but some updates.
Now direction is to battle the twin velos in our club.
Set the motor mounts in jb weld and skinned the front sponsons deck in 3/32" balsa, while the rear sponsons deck in 5/64" bass wood. Gonna run two proboat 1500kv motors and their esc's on 6s2p. Will need external bec, but should not provide any smoke, just magic.

Props: first pair 442, with 45mm on hand in case we need more blade.
She is up on the shelf curing now, pics to come.

[eric113]

Where the pics Jesse? I didn’t get that rigger.

[rayzerdesigns]

6s wouldn’t be legal in p offshore.. but yes.. pics and video please

[Jesse J]

Ray, thanks for the comment. The twin 6s is intended to race a club member and his twin zelos (not in any specific class). As you can see there is copious amounts of space, which equals flexibility. I'll probably add a center motor mount for either p lim offshore or full p offshore.
I'll get some pics up this weekend.
It's kinda slow right now, but I'm remembering how nice it is to work with wood!

[rayzerdesigns]

U can run twin in p.. I’m actually building a cheetah right now for p.. with twin 3674s.. I like ur build.. keep it up

[Jesse J]

Good point Ray, I could easily drop in a couple p motors and smoke some competition. The most important part for me now is to GET THIS KITTY WET!
Here are a few pics of motors and esc placement. Those are the old proboat 1500kv black jack motors and esc... don't tell anyone, but you can run em on 6s if you use external bec.

This design tends to render the space kinda tight... NOT! Tons of room...

[rayzerdesigns]

Nice!! So do u tape whole top part on?? How do i get to motors if not??

[Jesse J]

Patience my friend. I'll make progress and share the pics.

[Jesse J]

Skinned up

During the sleepless moments at night, I settled on the following technique:
The rear portions of the sides are covered with 3/32 bass sheets. I added a 4" strip of heavy glass to the underside of the sheeting. As well as sealing the wood, this hid the glass so I didn't have the hours of sanding required to get a paint ready surface. Also, this leaves me the option of having a nice birchwood deck, unpainted. Now it's super strong, lightweight and smooth.

I did a similar technique with the hatch, but with cf cloth. I learned with this part I didn't need to lay the cling wrap underneath... that's why it is irregular looking. Still need to add a canopy to the hatch... need more sleepless moments to land on a design.

You can see there is still plenty of room to get in and service or remove the motors. If I do install a single motor later, I'll leave the twin mounts in.

[Jesse J]

IMG_0534.jpg

IMG_0533.jpg

Now I have my rudder installed. Added a 3/16" cf plate inside and a layer of cf/Kevlar in the rear bay.
Realized I don't have a servo bracket... but Steve did!

[Jesse J]

Now to make the hatch flat with the deck.
Here I have epoxied a sheet of 1/32" plywood and a little weight to entice the hatch to assume the position while the glue cures.

I'll be working with Travis on a custom canopy with his mad carbon fiber skills.

[kfxguy]

Nice! Do the sides come off for easy access to the motors? That would be a nice touch.

[Jesse J]

Nope, sides are fixed... for now.
I can always add motor hatches that would screw down and be semi permanent.

[Jesse J]

Canopy

Working up a custom canopy. This is sandwiched 2" and 1" foam board, cut on the band saw following a design I drew in graphics software.
These are 5 min epoxied together and now the sanding begins.

Once I get the shape I want, I will coat with epoxy then send off to Travis for a carbon fiber shell from this mold.

[rayzerdesigns]

Looks good man.. can’t wait for u to get it running