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Hi guys, first post, and first "fe" boat build, please be kind.
About a month ago I ordered the hull from Brandon at Mountain Hobbies, arrived in 3 weeks. Looks nice, but received a bit of bow damage in shipping. Looked like it had been dropped on the bow, cracking it in a few spots, and the deck was separated from the hull in the stern. Luckily I had some West System epoxy here from a sailboat I had just built, so a day or two later everything was fixed up.
I chose a "larger" hull as I'm not getting any younger, and my eyes aren't what they used to be, so, bigger is better, small screws / bolts don't interest me anymore.
I bought this to have a "faster" sport boat that I could get going at a good speed, but most of all just have fun with on the water. I'm new to rc power boats, so haven't done any racing. None of the guys I rc with have any interest in boats, so I'm on my own here, and have be scouring these forums for information and ideas.
So, for the boat I decided I was going to run a 12s setup, I have 6s batteries from my 500 and 600 helis. After much internal debate I decided to go with a TP Power 5650 850kv, instead of a Leopard 5692 (similar kv). I had read some good things about the TP motors, and it was going to be a bit cheaper than the Leopard. Seeing as this is just a sport boat I didn't see the need for anything more / better. I went with a YEP 180a HV esc from Hobbyking, I use them in all my helis and really like the way they perform. Steering servo is a Savox SW-0231, 208oz torque at 6v. The esc has no bec so I'm running a 6v 1600mah nimh pack for the receiver and steering servo. All the hardware, rudder and stinger came from Promise Hobby as a package, I did get a stepped down flex shaft from OSE so I could run some 3/16" props.
I'm using a Spektrum DX3C transmitter with a Orange 3 channel land/marine receiver.
Went today for her maiden run, more to see if it would move, and hopefully stay afloat without filling up with water. The batteries were 6s, 5000mah and 4400mah (40c) in parallel, x2 , then series, (1 pair each side), so 12s 9400mah. Prop was a trial prop, x457 to start. I also have a x460, x463, x467 and a x470. The 67 and 70 are 1/4" so I'd need to bush the shaft if I was going to try them, or just put the 1/4" shaft in the boat. I have a Quanum Gps that I used for speed recording. I have turn fins and trim tabs but haven't installed them yet, wanted to see how she ran without them. The batteries are also a bit tired, there ok, but a few years old and have quite a few heli runs on them. I ended up using EC5's for parallel and series connectors, I have 6mm and 8mm bullets on a slow boat from China, but after running today I don't think I'll need them.
The lake was very flat, with just a slight breeze, nothing to be worried about. Plugged everything in, set her in the water, no leaks anywhere so off I went. Got her up on plane and got to about half throttle, holy crap this thing moves, better just go for a minute and check the temp. Bring her in and everything is cool to slightly warm at best to the touch. Go back out for about another 2-3 minutes, not much over 1/2 throttle, come back in, temps still the same, I'm liking this. Decided I'd recharge the batteries, fire up the GPS and see how fast it's going at 1/2 throttle, but it's moving pretty good.
Get her back in the water with charged up batteries. Run for about a minute, take her further out in the lake, point her towards me at shore, and get on the throttle to just over half and it's coming at me at a good clip, 3-4 secs maybe and I'm off the throttle. Pick her up, back to shore, on the stand, check the GPS, 82.1 kph (51mph), big grin on my face. Back in the water for another 4-5 minutes of ripping around pretty good, bring her back in and everything is just warm, batteries are at 3.75v per cell. I'm very happy with how things turned out. A 20lb, 51" boat going 50mph is basically all I wanted, and so far it's working great. I do have a EagleTree logger on the way, hopefully get some more numbers when it arrives. All I know for now is that she does 50mph at just over 1/2 throttle, and I can run for about 5 mins on somewhat tired batteries, that's ok with me for now.
She was "skipping" a bit in the turns, and bouncing a bit at "my" just over half throttle runs, so maybe I better put the trim tabs and turn fins on, they should help with that?
Here's a few pics.
20140704_115906 (Custom).jpg20140704_153256 (Custom).jpg20140704_153308 (Custom).jpg20140704_153320 (Custom).jpg
Thanks for reading...
Glen
Have to put the rub rail on as well. I have a Mobius camera, Ill see if I can get someone to take a video next time I'm out.
About a month ago I ordered the hull from Brandon at Mountain Hobbies, arrived in 3 weeks. Looks nice, but received a bit of bow damage in shipping. Looked like it had been dropped on the bow, cracking it in a few spots, and the deck was separated from the hull in the stern. Luckily I had some West System epoxy here from a sailboat I had just built, so a day or two later everything was fixed up.
I chose a "larger" hull as I'm not getting any younger, and my eyes aren't what they used to be, so, bigger is better, small screws / bolts don't interest me anymore.
I bought this to have a "faster" sport boat that I could get going at a good speed, but most of all just have fun with on the water. I'm new to rc power boats, so haven't done any racing. None of the guys I rc with have any interest in boats, so I'm on my own here, and have be scouring these forums for information and ideas.
So, for the boat I decided I was going to run a 12s setup, I have 6s batteries from my 500 and 600 helis. After much internal debate I decided to go with a TP Power 5650 850kv, instead of a Leopard 5692 (similar kv). I had read some good things about the TP motors, and it was going to be a bit cheaper than the Leopard. Seeing as this is just a sport boat I didn't see the need for anything more / better. I went with a YEP 180a HV esc from Hobbyking, I use them in all my helis and really like the way they perform. Steering servo is a Savox SW-0231, 208oz torque at 6v. The esc has no bec so I'm running a 6v 1600mah nimh pack for the receiver and steering servo. All the hardware, rudder and stinger came from Promise Hobby as a package, I did get a stepped down flex shaft from OSE so I could run some 3/16" props.
I'm using a Spektrum DX3C transmitter with a Orange 3 channel land/marine receiver.
Went today for her maiden run, more to see if it would move, and hopefully stay afloat without filling up with water. The batteries were 6s, 5000mah and 4400mah (40c) in parallel, x2 , then series, (1 pair each side), so 12s 9400mah. Prop was a trial prop, x457 to start. I also have a x460, x463, x467 and a x470. The 67 and 70 are 1/4" so I'd need to bush the shaft if I was going to try them, or just put the 1/4" shaft in the boat. I have a Quanum Gps that I used for speed recording. I have turn fins and trim tabs but haven't installed them yet, wanted to see how she ran without them. The batteries are also a bit tired, there ok, but a few years old and have quite a few heli runs on them. I ended up using EC5's for parallel and series connectors, I have 6mm and 8mm bullets on a slow boat from China, but after running today I don't think I'll need them.
The lake was very flat, with just a slight breeze, nothing to be worried about. Plugged everything in, set her in the water, no leaks anywhere so off I went. Got her up on plane and got to about half throttle, holy crap this thing moves, better just go for a minute and check the temp. Bring her in and everything is cool to slightly warm at best to the touch. Go back out for about another 2-3 minutes, not much over 1/2 throttle, come back in, temps still the same, I'm liking this. Decided I'd recharge the batteries, fire up the GPS and see how fast it's going at 1/2 throttle, but it's moving pretty good.
Get her back in the water with charged up batteries. Run for about a minute, take her further out in the lake, point her towards me at shore, and get on the throttle to just over half and it's coming at me at a good clip, 3-4 secs maybe and I'm off the throttle. Pick her up, back to shore, on the stand, check the GPS, 82.1 kph (51mph), big grin on my face. Back in the water for another 4-5 minutes of ripping around pretty good, bring her back in and everything is just warm, batteries are at 3.75v per cell. I'm very happy with how things turned out. A 20lb, 51" boat going 50mph is basically all I wanted, and so far it's working great. I do have a EagleTree logger on the way, hopefully get some more numbers when it arrives. All I know for now is that she does 50mph at just over 1/2 throttle, and I can run for about 5 mins on somewhat tired batteries, that's ok with me for now.
She was "skipping" a bit in the turns, and bouncing a bit at "my" just over half throttle runs, so maybe I better put the trim tabs and turn fins on, they should help with that?
Here's a few pics.
20140704_115906 (Custom).jpg20140704_153256 (Custom).jpg20140704_153308 (Custom).jpg20140704_153320 (Custom).jpg
Thanks for reading...
Glen
Have to put the rub rail on as well. I have a Mobius camera, Ill see if I can get someone to take a video next time I'm out.
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