Scratch cat 36"

[ls1fst98]

sweet, PDF works, we have a laser cutter at my buddys work and he can work with that. greatly appreciated!

[OldMann]

Hallo Jesse J
...propellers used in this application are not good. You need a propeller rotation on the left and a right.

[Jesse J]

copy that. those were two sitting around that happened to be 42mms. I have my CR props on the way from Egneg, so rest assured - props will be opposing directions. thanks for pointing that out, I figured more would have said something about it.

[Jesse J]

gettin there

So ponds thaw = back to work

got drives in (.078" wire), struts mounted, cooling tubes in and bottom ready for testing. Went with slightly staggered rear ride pads and tried a little negative camber on the inner front sponsons.

two coats of west systems seems to do it - no glass. still need to get the top deck coated and the hatch done. I formed the cowl out of construction foam and did glass that - you never know. Once upper deck is done, I won't have much room to play like I do now. All areas covered in these shots are full of foam, so I don't think there is much risk of sinking - unless somebody stands on it.

struts are starting out pretty much straight - adjust as necessary. Rudder is not impressing me with size... so it might get upgraded. Went with two Proboat motors and Swordfish 120s. Will spin x442 CR props prepped by Egneg.

[tiqueman]

Thats lookin real good Jesse. Cant wait to see it run.

[Jesse J]

Thanks dude,
anyone who has huffed sawdust for weeks/months on end will appreciate what has gone into this one... Simon has been a big inspiration with his design-oriented builds and lacquered balsa look, as well as others out there with a half inch of sawdust on everything int he shop. If it stops snowing, I might get her out in the next few days - electronically she is ready. Just need to get the hatch done and she will be sportin roost.

[dana]

nice work jesse looks like youve stepped it up a bit on this one man you love those proboat motors dont ya? hehe cant wait to see video!

[Jesse J]

thanks for the compliments guys.

video is uploaded.
Overall, she is very stable, turns good - I even pushed one turn and she kinda skidded around it not hinting of flipping. Has a ways to go to get speeds up towards 60, but I think the hull design is success - I like how she rides. Might want to raise struts a tad.

couple issues:
1) she ended up pretty bow heavy... everything as far back as possible and I barely make 33%. I am tempted to add some ballast to the rear.
2) rudder might be too small? she hooks pretty sharp. Could be partially due to negative angle on inside of front sponsons too forward COG?

Funny thing is that my Intruder 38" twin did very similar thing - and had a big rudder.
Maybe just a function of twin cats? or running too wet?

[tiqueman]

[Jesse J]

not the prettiest princess but water-tight

So after copious amounts of west systems (two coats per side) and a fair bit of bondo, she is water - ready.

The hatch was quite time consuming. I ended up using 1/8" bass wood sheet, curved to match the deck and then heavy (6oz) glass and more west systems on the bottom. More in a rush than anything, I added the white styrene to water proof the top for the test runs.

for the cowl, I traced the outline (top and side view) of the cowl on the platinum princess and scaled this to my build size. I then attached these printouts to blocks of insulation board and went to the band saw. After some 80 grit sandpaper and some elbow grease, I got it shaped pretty good. then I west systems'd with heavy glass and then coated a second time for a better finish.

To make a sturdy closure, I have a couple hooks in the front then down in back with the cowl locks (from OSE - the small ones). I also want to tape for extra strength and water proofedness, so I built up a ledge around the cowl. After some bondo and another layer of west systems, we are starting to get there.

Once I am happy with performance and looks, we will paint. For now, I added some adhesive monokote for a bit of color.

[DV8ion]

The boat looks good I know you found a set of drives already, but I thought these looked pretty good.

http://www.horracing.com/product_info.php?products_id=441&osCsid=nmosjsi51ieal2b0bnnslnjvn1

[Jesse J]

Thanks for that link.. eh! those could very easily be on my next twinskies. BUT, this build was kinda meant to be "lets see what I can do on a budget" build. I know the next one will be an HPR or something sexy like that (once I start making some real money).

[Jacked1]

The boat looks awesome!! I am deff going (to try) to make a woodie this summer when I get some time.

You could try kicking the bottom of the rudder forward a little to push the bottom of the boat down in the turns some.

[Jesse J]

Thanks for the compliment and seeing the end product - rather than the present aesthetics.

Well, my Speedmaster 21 rudder came in yesterday's noontime mail delivery - and after 4 hours of revamping (modifications and decisions, many of which did not make it to the final setup...) I got her mounted up. During the process, I noticed the low profile servo didn't have satisfactory torque, so I replaced it with higher torque laying down (Hitec 485 HB).

The good news (): it started snowing just as I got her buttoned up... now its 29F and 4" of snow... WTF???

Anybody have any good ideas about what to do with the water pickup? I have thru-hull pickups that are sufficient... now can either plug or do something fun with water spout...

[Meniscus]

Jesse, are you running 4s2p?