Old member....new build....scale build...

[ScarabChris]

That's one of the coolest RC boat videos I've ever seen!

Did you notice my s**t eating grin when I shut the camera off? LOL. That face shows how I felt about the run. Wait until I get the splashing from the trim tabs eliminated, you will be able to see the mechanics much better.

Did you see my on board videos from many years ago on the RC Scarab? I'm repowering this one too.

https://www.youtube.com/watch?v=-iVAx02PH1c&t=53s

https://www.youtube.com/watch?v=Y-A_3Bo-PLs

https://www.youtube.com/watch?v=YCilsao6d8k&t=168s

[srislash]

Very nice vid, love the action viewpoint. I should try that on my drives to see how they act. I notice those tend to move up and down a bit. Is that th3 built in kick up Chris? Mine just have a bit of slop in them, lol.
Now I have to watch your others

[ScarabChris]

Very nice vid, love the action viewpoint. I should try that on my drives to see how they act. I notice those tend to move up and down a bit. Is that th3 built in kick up Chris? Mine just have a bit of slop in them, lol.
Now I have to watch your others

The drives move up and down because I have a machine screw just stuck in hole that the trim goes in to hold the drives at the angle I want. I have a couple O-rings on the screws to space them so the movement is the thrust of the props compressing the O-rings. I'll get that sorted out too.

They will kick up if I hit something. Also giving the motors to much reverse will cause the props to suck the drives up.

[Kmot]

For some reason I stopped getting notifications of posts to this thread, from many weeks ago. So I dropped in to check and wow, your boat is completely changed now from the Graupner's! Your method of installation really looks cool. My pond has been unusable for months and have not even run mine a second time yet...

[ScarabChris]

More videos. Moving the trim tabs up made a world of difference. Now I need to angle them down slightly to stop the porpoising. In the last run the port motor threw the U-joint which you can hear. The flung U-Joint also took out the water cooling hose for that motor which is why you see water in the hull. The GPS clocked 32 MPH max speed and I did not even give it full throttle.

https://www.youtube.com/watch?v=cDcdBggfr0E&feature=youtu.be

https://www.youtube.com/watch?v=qD-BBCVg4YA&feature=youtu.be

https://www.youtube.com/watch?v=As_Vq_m_80g&feature=youtu.be

https://www.youtube.com/watch?v=QDbQhnlMJGg&feature=youtu.be

[ScarabChris]

For some reason I stopped getting notifications of posts to this thread, from many weeks ago. So I dropped in to check and wow, your boat is completely changed now from the Graupner's! Your method of installation really looks cool. My pond has been unusable for months and have not even run mine a second time yet...

Yeah man I tried real hard to keep the Graupner drives but they just aren't made to handle the power of the motors I'm using. The moment I got the gears meshed just right it ran sweet but not for long. All those Graupner drives need is hardened steel gears and they will be able to take the power. I am going to keep them and store them in hopes one day I come across some really good gears for them and then I will use them on a future build.

The AMPS drives are built to take the power of a big nitro or 30cc gasoline engine so they can take the power of these brushless motors. That doesn't mean they are without flaws. The shaft seals aren't the best so water gets into the gear oil after each run. I really wish they had true seals on the upper input and prop shaft.

[Kmot]

I hope my old school brushed motors don't ruin the gears in the Graupner's. I believe they were made for those motors so hopefully mine will be okay. Your boat is looking awesome!

[CraigP]

Brushed motors develop torque slower, which should be much easier on the gearing in the drive. I think that’s a good choice! You can also reduce the rapid rise in torque on a brushless (or any motor) by slowing down the speed of the throttle channel, a feature many xmitters have.

[srislash]

More videos. Moving the trim tabs up made a world of difference. Now I need to angle them down slightly to stop the porpoising. In the last run the port motor threw the U-joint which you can hear. The flung U-Joint also took out the water cooling hose for that motor which is why you see water in the hull. The GPS clocked 32 MPH max speed and I did not even give it full throttle.

https://www.youtube.com/watch?v=cDcdBggfr0E&feature=youtu.be

https://www.youtube.com/watch?v=qD-BBCVg4YA&feature=youtu.be

https://www.youtube.com/watch?v=As_Vq_m_80g&feature=youtu.be

https://www.youtube.com/watch?v=QDbQ...ature=youtu.be

Well that certainly cleaned up the water running everywhere on you.

It looks like it wants to run light for sure. Very light adjustment on the tabs. It doesn’t usually take much

[ScarabChris]

Well that certainly cleaned up the water running everywhere on you.

It looks like it wants to run light for sure. Very light adjustment on the tabs. It doesn’t usually take much

Yeah for sure the tabs needed to be moved up. I think I got the drive angle perfect, just need to move the tabs down a little. Hard to see in the videos my wife took with her phone but when it's "gettin it" the hull is riding on the last 3 inches of the keel.

[zooma]

Hey, Chris, hate to see you running in salt water. Are you aware of the RC boat lake at West Delray Regional Park?

[ScarabChris]

Hey, Chris, hate to see you running in salt water. Are you aware of the RC boat lake at West Delray Regional Park?

Nothing wrong with running in salt water. Yes I know of plenty of lakes but I have no desire to load everything into my truck and drive, especially to the one 30 minutes away in Delray. I have lots of water right in my back yard so why would I want to load all my crap and take a long drive to test my boats when I can walk out back and toss them in the canal? I got into RC boats because I grew up on real boats and I like bringing my RC boats out in open water on my real boat.

I don't see salt water as a problem, it's just water. I rinse and flush the salt water after each run. All my boats run in salt water and I have never had a salt water related problem.

[emspjay]

Awesome build! That is so cool!

[ScarabChris]

Thanks for the compliments. I'm almost done with the mechanics. Next is the cosmetic stage. Stay tuned....

[ScarabChris]

Working on the cosmetic end of the build. While waiting on a new wrap from MonoJeff...I'm doing something different with the hatch. I never liked the huge scoops on the engine cover part of the hatch on these Apache 50's. So I cut them off and put in some clear blue acrylic. I haven't trimmed it out yet. I'm in the marine LED business so I may put some LED strip lights inside just for the "cool factor" which is demonstrated by putting a flashlight in the hull.

I though it would be cool to be able to look in and see the motors.