1:12 us coast guard airboat - Page 6 - RC Groups
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Sep 23, 2012, 12:09 PM
Semi-Official Tinkerer
Subdave's Avatar
BTW
What did you use for the non skid?
Emery cloth?
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Sep 23, 2012, 05:04 PM
GET BACK IN THE SHOP!!!!!!
CaptDH's Avatar
Just got back from a lake run. Still getting a TON of water through the rear hatch. I just need to silicone it down then all should be fine. What I really liked about the model was it is heavy and really needs power to get it going. It felt very realistic getting it on plane and then backing off the power. All stayed pretty cool and I'm thinking the 35 amp ESC is fine considering I normally run this motor on a 20 amp esc with no water cooling. This model is twitchy and needs to be driven the entire time. Sort of like an RC helo compared to an airplane trainer. I actually used my dual rates to slow down the turns.

D
Sep 23, 2012, 05:17 PM
Grumpa Tom
Kmot's Avatar
Congrat's, she looks great!

What pond were you running at?
Sep 23, 2012, 05:43 PM
Registered User
Sea_Horse's Avatar
Excellent Mr. D, wonderful job on the boat!
Sep 23, 2012, 06:02 PM
Semi-Official Tinkerer
Subdave's Avatar
Very nice my friend.
If you have ever driven a hydrofoil it is like that.
You have to fly the boat rather than just drive it.
Can it do a sliding turn in reverse?
Or would it flip.
Sounds like the key is keeping the CG low. Dave.
Sep 23, 2012, 07:21 PM
GET BACK IN THE SHOP!!!!!!
CaptDH's Avatar
Thanks..


This run was at Cerritos Regional park. My bet is it would flip on a left turn and maybe not on a right. This is a narrow, top heavy boat so drive it scale.
Sep 24, 2012, 01:06 AM
Taking care of the pond.
MILLERTIME's Avatar
Looks great on the water.
Sep 24, 2012, 09:01 AM
boat butcher
the goon's Avatar
Very nice. Wish you could have brought it to the Inland Nautical Society regatta.

Mark
Sep 25, 2012, 09:47 AM
Registered User
Sea_Horse's Avatar
Progress so far...but going slow. Added the upper rudder support



D, tried the 6 x 4 prop but she's fitting too tight so Dave and I are goign to try a 5 x 3.5 from Cox. I'll let you know how that goes
Sep 25, 2012, 10:07 AM
GET BACK IN THE SHOP!!!!!!
CaptDH's Avatar
Seahorse,
I used the 6-4 and just cut the blades down 5mm and balanced. As for the non-skid, just grip tape from a skateboard shop.

D
Sep 25, 2012, 12:20 PM
Registered User
Sea_Horse's Avatar
D, I thought about trimming down the prop, SubDave suggested it too. I may go back to the 6x4 if the new prop doesn't work out. Thanks for suggestion and for the the non-skid tape tip!, that material should hold up for a long time.

The prop I ordered has a little more girth to it:

Sep 25, 2012, 04:10 PM
GET BACK IN THE SHOP!!!!!!
CaptDH's Avatar
I can tell mine is revving a bit high but also noticed the heat is down. Plan to try the APC 6x4 trimmed to compare noise..

D
Sep 25, 2012, 06:54 PM
Keep a Steady Strain....
capntroy's Avatar
Nice pics Darrin, she looks great on the water...
Sep 26, 2012, 03:37 PM
Semi-Official Tinkerer
Subdave's Avatar
I think I will experiment with two props back to back in a 6 blade setup.
It would look cool for sure.
Not sure if the prop adapter is big enough though.
I did this years ago in a ducted fan design but cut the blades way down for that.
The motor we are using will more than handle the two props. Dave.
Sep 27, 2012, 12:35 PM
Registered User
Sea_Horse's Avatar
D, I'll keep you posted on the Prop trials. I'm looking for a "good" tube bender, I bought a K&S bender, works nice but only on soft brass. Got any suggestions? Thanks
Last edited by Sea_Horse; Sep 27, 2012 at 01:18 PM.


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