Bottom photos as requested…
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Finally able to buy some epoxy, this stuff isn't cheap and hands down the best in my opinion. Somewhat local purchase old skool on the phone through Merton's Fiberglass in MA, no need to order from WA state. Best part, ships ground UPS next day to Northern Vermont. System Three 1 1/2 QTs will hopefully last me for several more all wood builds that I have lined up.
- 1/12 Scale www.Classichydros.com Karleson Style kit from Doug C himself
- 1/10 Scale Wafarers Lady build
- 1/10 Pay n Pak (mostly finished, just need to build canopy area top)
- 1/5.2 Scale Sid-Craft F Hydro, Dick O'Dea
- 1/10 Scale Cozy F1 build
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
It is a far eastern built hull, which means not necessarily made from good epoxy resin, but with possibly polyester resins. The paint, build quality and overall looks and scale is stellar, super cool, trick little hull for the cost.
I'm going to reinforce with the kevlar I bought and new epoxy, but instead of ripping out all the already glued in wood and mounts, just leave them intact and reinforce and integrate. I don't really feel like creating stress cracks by removing something that is already glued into a fragile hull. This will cut down the time too.
I will leave the factory hardware installed and just use a slightly larger spec than factory 2860 motor, 2700kv on 3S. This will be a fine little runner as is. I have bigger builds that will require more mods and faster equipment. I basically bought this because it was already finished. Just needs a little internal strengthening so is can withstand some good stashes at speed and still look good afterwards.
Cheers, Thompson
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Looks like a lynx cat or mini zonda. I did mine a twin....it's a pain but looks cool.
HPR 135 redemption, HPR C5009, modded zelos 36, 32 boats and counting.
Flier ESC dealer, pm me for details.
https://www.facebook.com/groups/EliteRCBoats/
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Did a little work this rainy weekend on the baby Cat. WTHeck was Exceed manufacturers thinking using white silicone to glue in the nylon nuts??? :strange:
Had to use a little creative nut removal tool, an old Tamiya wrench. This removal redefines blind nuts. The operator is definitely blind getting the top two! Thanks to the iPhone camera, I was able to see what is still in there, still more to remove... The sharp edges of my Hudy allen wrench work pretty well at removing the white silicone. Fortunately, this comes off really easily.
Planning to get some 1/8" birch ply, carbon kevlar and epoxy back there.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Nice work.
I wouldn't use ply in there. I've found that after a while the ply tends to compress where the nuts are & so they, in effect, become loose. Then you have to get in there again & re tighten them. Carbon or aluminium would be better.
See the danger. THEN DO IT ANYWAY!!!
https://forums.offshoreelectrics.com/...hp?albumid=319
https://forums.offshoreelectrics.com/...hp?albumid=320
Good call on the aluminum plate, thanks!
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Here is a transom piece of 6 layer 1/8" birch ply (not lite ply) and measurements if anyone is interested. This fits well in the back, but took me several cuts to get one that fits! I just need to get more layers of ply (or hardwood block) behind to fill the square area and then get longer socket head bolts and add a 1/16" aluminum plate over the plywood after it is finished—like a giant washer for the nuts.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Good one.
Make sure you seal it well with epoxy. Especially the edges. It will get wet from time to time
See the danger. THEN DO IT ANYWAY!!!
https://forums.offshoreelectrics.com/...hp?albumid=319
https://forums.offshoreelectrics.com/...hp?albumid=320
An option to aluminum is Lexan. I've used this in several models that have survived high-speed crashes at over 80mph. I know that a lot of folks may have issues with polycarbonate cracking, but the thicker Lexan has served me well. It may weigh just a tad more, but I doubt it will make much difference for such little material as is used on an application such as this. In my applications, I haven't noticed any loosening of the nuts.
IMPBA: 7-Time FE World Record Holder "Don't think outside the box. Rather, refuse to admit that the box exists in the first place!"
MGM Controllers - Giant Power Lipos - ML Boatworks - Wholt's Wire Drives & Struts - Nano-Oil
That's interesting using thicker lexan. Hmm. I'll have more progress and photo over this weekend, thanks for the tips.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Looking good man !!
love this little cat
.NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s
Finally had some time to get back on this project!
Opened up the wood channel for 3S 4000mAh 20C battery.
Carbon fiber kevlar prep
I was able to get two strips almost down the length of each sponson, just shy of the tip by about 2.5"
Chopped glass, 1/8" birch ply transom added with poured in epoxy.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Added a separate water pickup for either the motor or ESC. Curved at the bottom and flush. Used CA glue to fix position, then epoxy with ply reinforcements.
Didn't like the Z bend on the rudder connection, so soldered a tight clip—no play now! Graupner/SJ 658 BB MG servo.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Added flotation
Turned out I didn't even need to add an aluminum plate on the backside of the new ply transom. The epoxy / chopped glass filled the void and I even added a second layer of ply before to the transom just in case. I used the stock length bolts and just tapped the epoxy / chopped glass. No need for nuts!
Installing a water cooling tube on the transom water inlet proved to be a little challenging, no room for fingers. This was also tapped into the epoxy, so to be a water tight fit. Idea! I used a slightly larger brass tube over the silicone tubing and pushed it on.
Specs
- Turnigy 2860 2700kv motor with 28x58mm water cooling jacket from OSE.
- Turnigy Marine 120A ESC, Graupner 658 BB MG digital servo, Airtronics / Sanwa MX-V 3-channel radio.
- Battery: Zippy 3S1P, 4000mAh, 20C with 4mm connectors.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
More...
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
And finally a video of the maiden.
In the video, I used the stock 432/3 carbon prop, stock 4mm flex cable and shaft.
I have a 436 CNC and 436/3 TFL (needs balancing). Might try these both.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Swapped to a CNC Aluminum 436 prop.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Was this on 3s ?
looks good man !
.NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s
Thanks! Just need to pull out all the blue flotation foam and add CF/Kevlar epoxy to the sponson tips and front area. Don't want to have this happen if I catch a tip WFO…
http://www.rcgroups.com/forums/showp...&postcount=720
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Thoroughly enjoyed the read-up on this build. So much great info and excellent pics! I just recently picked up this boat and am going to apply what I learned here to take a shot at doing a CF inlay.
Bit of an older thread now, but would love to hear an after-action on how you liked the boat and its performance, given all the work you put into it.
Mark
@Davey80 - Thanks! There was only one item that I neglected to fully address, getting enough epoxy down into the sponson tips, before adding the flotation foam. I did add some epoxy, but could have added a little more. You don't want to add too much weight though. The CF reinforcement definitely helps, just keep the epoxy application light.
It's a fun little scale hull and certainly fast. I was about at the limit with power and battery, as you can see in the video, the torque roll was significant on full throttle. I've since sold this on, so can't really help out with further performance tuning.
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
Cheers, Thompson
1/10 1954 Breathless U-22, Tahoe Yacht Club | 1/16 1958 Dumas Thiftway Too, built in '92
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