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RE: the unofficial home of the dumas dauntless - 4/23/2012 7:05 PM   
Sound Sailor


 

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Status: offline 		Sky, since you already have a 12 go with the same or else  they probably will not turn the same rpm. If running with a single throttle you want them turning the same rpm. Those motors will take more than their rated voltage with no problem and the rating is probably about the mid point of their voltage range. For instance my 700's are 9.2 and i am running them at 12v.

Rich, I just googled a pic of a vintage fighting chair and did a SWAG on measurements based on 1:16. Made the seat first and sort of eyeballed from there. I used scrap poplar I had around and stained it. Since I am not going to put that canopy over the cockpit I put the chair in the center figuring the flag would be stowed while fishing anyway.

I am contemplating trying 1 1/2 3 blades before doing major work to put in cooling. Conventional wisdom says when running bigger high speed motors to use smaller props to cut down on overheating. If nothing else it will be an interesting experiment.

Bill

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RE: the unofficial home of the dumas dauntless - 4/23/2012 7:46 PM   
Rich404



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Status: offline 		Hi Bill,

I'm thinking about fusing the ESC's and Power Distribution Panel. I know nothing about fusing but I know that you did it to your boat.

Can you tell me a little about the process and add some pictures to help me understand how to do it?

Thanks bud!

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/23/2012 8:14 PM   
Sound Sailor


 

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Status: offline 		Rich, there are various types of fuses you can use. I.E. there are the glass cartridge fuses  such as were used in autos in the past and there are the spade type that are used in todays cars. The spade type come in two sizes and I used inline holders from the shack in mine. I just used one fuse in each battery feed. In your case you are more concerned about hiding the wiring etc so you probably are better off going with the glass type with multiple ones on a fuse board or panel. The ones I used are quite bulky.
If you are using the Harbor distribution panel I thought that was fused.
In the photo you can see the spade in line holder to the left of the rudder servo. It is wired right off the + side of the battery lead which then goes to a terminal strip. You can see it is very bulky. The ESC is  wired to that TS.
I'll look on my camera since I think I have a photo of a very neat wiring job from the E. S. show using small glass cartridge fuses. There are some wiring diagrams also online and I believe that is on Action's site.

Bill

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RE: the unofficial home of the dumas dauntless - 4/23/2012 8:22 PM   
Rich404



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ORIGINAL: Sound Sailor

Rich, there are various types of fuses you can use. I.E. there are the glass cartridge fuses  such as were used in autos in the past and there are the spade type that are used in todays cars. The spade type come in two sizes and I used inline holders from the shack in mine. I just used one fuse in each battery feed. In your case you are more concerned about hiding the wiring etc so you probably are better off going with the glass type with multiple ones on a fuse board or panel. The ones I used are quite bulky.
If you are using the Harbor distribution panel I thought that was fused.
In the photo you can see the spade in line holder to the left of the rudder servo. It is wired right off the + side of the battery lead which then goes to a terminal strip. You can see it is very bulky. The ESC is  wired to that TS.
I'll look on my camera since I think I have a photo of a very neat wiring job from the E. S. show using small glass cartridge fuses. There are some wiring diagrams also online and I believe that is on Action's site.

Bill


Hi Bill,

Thanks for the info! The Harbor PWR Dist pnl does not come fused. The box is locked up with no way inside and there are no fuses on the wires.

So the fuse holder only gets installed on the positive wire between the battery and the accessory?

Is this it?

If so I will need 3 fuse holders plus fuses.

-Rich.


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RE: the unofficial home of the dumas dauntless - 4/23/2012 8:36 PM   
Sound Sailor


 

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Status: offline 		OK Rich, I just checked and the lower voltage ouputs are thermal protected (circuit breaker) on the distr. panel but not the 12 in or out.
When fusing any circuit either ac or dc only the hot lead or + is fused. I only used the one fuse on each battery feed since I am not running anything else but the motor/esc off the battery. If running other things they might require different amp fuses than the main. Think of your house wiring. Some appliances may need only a 15 amp breaker  but some may need a 20. A fuse is the same as a breaker only not resettable. Before breaker panels we used screw in glass fuses in the house. Hopefully all your gadgets came with a reccomended fuse use.

Bill

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RE: the unofficial home of the dumas dauntless - 4/23/2012 9:00 PM   
Rich404



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Status: offline 		Hi Bill,

Thank you for the info. I have to check the accessories to see if there is a recommendation for fusing. I think the PWR dist pnl will be fine because there will be very little bit of amps drawn from it. The pwr dst pnl will run the Robbe decoders for a bunch of wheat lights, the radar motor, the receiver and 2 12V fans for the engine room. I think that is it but it is still too much to tie together with my motors using one or two batteries. I think I will put a 25-30 AMP fuse on that and be done with it. None of those items will ever draw much...knock on wood....

The motors on the other hand will be on their own seperate line. This will be the ESC's with  deactivated BEC on each one, the sound module and a motor. The Sound module comes with seperate cables to attach to each ESC. This gives a few detailed wiring diagrams so I will follow that to my proposed set up of individually powered motors. I think a 30AMP fuse will be chosen for each one because the ESC is rated at 30 AMPS.
 
To boot the ESC's will be water AND fan cooled to help keep them cool and happy. This should hopefully minimize glitches.

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/24/2012 1:14 AM   
Apismelifera



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Status: offline 		Have a look here for more information on where to put the fuses, and why.

http://www.rcgroups.com/forums/showthread.php?t=783582



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RE: the unofficial home of the dumas dauntless - 4/24/2012 2:55 AM   
Rich404



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Status: offline 		Thanks John! I saw this post a long time ago but forgot about it. You are right this is useful for fuse placement and is consistent with what I described earlier except he describes putting a fuse on both sides of the ESC which is good to know.. It's good to cross  reference great posts like that one.

Thanks again!

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/24/2012 12:10 PM   
Sound Sailor


 

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Status: offline 		Having the 2 fuses is a very safe way to go and protects the Esc from the motor going bad. If you are running a very high amp rated Esc it could be considered overkill, IMHO. The rating on the ESC is not what it draws but what it can withstand. A 35 amp Esc will tolerate at least 30 amps draw from a motor and that is quite high although it could happen with say a fouled prop. This is my only boat with ANY fusing since all the others are ARTR and they did not come with fuses. I have had a fouled prop on my tug that has a 15 amp Esc, no fuses at all, with no damage to anything.  Fusing is basically a protection for the electronics but if it blows there is obviously a problem already. Of course with lipos there is a bigger danger of fire.
Again it is sort of like your house. You have a main breaker which is like the fuse I have on the battery side, and you have distribution breakers which is like fuses on your individual electronic devices
I'd say go with you are most comfortable with.

Bill

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RE: the unofficial home of the dumas dauntless - 4/24/2012 2:41 PM   
Rich404



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Status: offline 		Hi Bill thanks for the additional details. The ESC's that I am using are the Astroflight HarborMaster 208D which is rated at 30 AMPS. Should I go with 25 or 30 Amps?

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/24/2012 5:58 PM   
Sound Sailor


 

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Status: offline 		Rich, it is usually reccommended to go 5 amp under the rating of the ESC. Gives a cushion so as not to blow the ESC up.

Bill

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RE: the unofficial home of the dumas dauntless - 4/24/2012 10:58 PM   
Sound Sailor


 

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Status: offline 		Well Dauntless has been sharing the shipyards attention lately with Whim the lobster boat. I made some details and also added a couple of dollhouse items since she is 1 :12 scale.
I made an engine box since it never looked correct without one. Then took the free standing bait/banding station ,cut the legs and added it to the top of the motor box. Two small items every lobsterman has are the length guage and the claw banding tool so I fashioned them out of scrap brass. You can see them on the station.  Also added a hose for washing down after a day of fishing and a pair of work gloves. Not visable is the fire exstinguisher and a cup of Dunkin Donuts coffeee for the skipper since the day starts so early for  a boatman. Just visable hanging from the port handrail is a set of 4 ball fenders. She should fit right in when I take her to Maine in June.

Bill

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< Message edited by Sound Sailor -- 4/25/2012 1:00 AM >

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RE: the unofficial home of the dumas dauntless - 4/25/2012 3:07 AM   
Rich404



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Status: offline 		Hi captains,

I have to do a demonstrative speech in my public speaking course so i'm thinking about doing it on the Dauntless. I'm wondering, what can I demonstrate on Dauntless? I am thinking about a 'how to" but what should I base it on? Ideas are welcome...

I have to send the professor an outline this week and do a presentation next week.

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/25/2012 5:17 AM   
dauntlessfan



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Status: offline 		How to scale any full size object to 1:16...? So many details you could use as examples by having both your boat and some printed prototype photos in front of you...?



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RE: the unofficial home of the dumas dauntless - 4/25/2012 8:21 AM   
Hydro Junkie


 

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Status: offline 		Rich, can I throw in my .02 on wiring and fuses?
I would recommend that you power up each circuit/accessory individually and find out the actual current draw of each. By adding up the draws, it will give you a baseline on how heavy of fuses and supply wires to use. I'd hate to see all that work go up in smoke or down to the bottom due to a mis-sized wire or undersized fuse as I've seen others do in other projects

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RE: the unofficial home of the dumas dauntless - 4/25/2012 2:53 PM   
Rich404



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ORIGINAL: Dauntlessfan

How to scale any full size object to 1:16...? So many details you could use as examples by having both your boat and some printed prototype photos in front of you...?


ooooohhh that's a very good idea!  I'm glad I ask such questions..

-Rich.


< Message edited by Rich404 -- 4/25/2012 3:58 PM >

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RE: the unofficial home of the dumas dauntless - 4/25/2012 4:36 PM   
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Status: offline 		Bill,

Where did you get your sitting Lobster-man?  I've seen one once before but have not been successful in locating one.

Bob


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RE: the unofficial home of the dumas dauntless - 4/25/2012 6:14 PM   
Sound Sailor


 

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Status: offline 		Bob, both my figures came from George Turner Models in the UK. He did fantastic work but unfortunately he stopped making figures and went back to doing autos. He did prototype work for companies like Matchbox etc.
Some other guys have used commercially available figures of the McKenzie brothers from TV.
Bill

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RE: the unofficial home of the dumas dauntless - 4/25/2012 7:20 PM   
Rich404



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Status: offline 		Hi Bill,

Where did you get the fuse & holders for your boat?

I went to Radio Shack & they only carried 110-220V stuff...
-Rich.

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RE: the unofficial home of the dumas dauntless - 4/25/2012 7:30 PM   
Rich404



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Status: offline 		Hi guys,

Last night started mapping out the electronics for the boat.

I also opened up the F-14 TX for the first time and today bought some rechargeable batteries for it.

I am torn on trying to finalize where to put the receiver. It is going either inside the map table in the main cabin or on the wall near the entrance of the engine room.

I am now leaning toward the main cabin because it is out of sight and will still be easy to run the wire outside the boat by utilizing a tall antennae on the side of the cabin..

This will allow me to run the radar motor and mast light without a chance of interference on the mast.

-Rich.

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RE: the unofficial home of the dumas dauntless - 4/25/2012 7:46 PM   
Sound Sailor


 

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Status: offline 		Rich, the  wire inline spade type fuse holders I have are from Radio Shack these you usually find in the area with the many pull out door cabinets with switches etc that they have in every store. BTW they even carry 7.2 and 8.4 RC batteries with Futaba plugs!

Have you tried the F14 on the bench with some servos yet?

Just now put 1 1/2 props on Dauntless. We'll see if it was a hit or a miss when I get a chance to run her. Should be interesting. Struck me, i wonder what dia props the real Dauntless had. Not that it would translate to the model but just wonder what it would scale to.

Bill


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RE: the unofficial home of the dumas dauntless - 4/25/2012 8:59 PM   
Rich404



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ORIGINAL: Sound Sailor

Rich, the  wire inline spade type fuse holders I have are from Radio Shack these you usually find in the area with the many pull out door cabinets with switches etc that they have in every store. BTW they even carry 7.2 and 8.4 RC batteries with Futaba plugs!

Have you tried the F14 on the bench with some servos yet?

Just now put 1 1/2 props on Dauntless. We'll see if it was a hit or a miss when I get a chance to run her. Should be interesting. Struck me, i wonder what dia props the real Dauntless had. Not that it would translate to the model but just wonder what it would scale to.

Bill



Hey Bill perhaps it's just the Radio Shack in Stamford that is lacking...I wil check the one neaar my house.  I did not bench test the F-14. I opened it up last night & found that it needed rechargable batteries so I bought some Venom Rechargables today at Hobby town.

Tonight I am going to install the switches on the F-14 and begin charging the batteries. The transmitter comes with a plug that plugs right into it. It seems like a neat transmitter. I read the manual today to get acquainted...

I have no idea what prop was on the F/Sized Dauntless...

Recently I began looking for LIPOS. I was going to go all out for the expensive ones but others in the hobby advised me not to over spend and continue to look at the hobby King Stuff. So today I found 3 batteries for $109.. Not bad at all! I think this can save the ocean Liner for now...

I decided that the batteries will go like this:

(1) 5000 MAH 25C 11.1V for the power distribution panel. This is more than plenty enough to run the accessories which are all low amp stuff.

(2) 5000 MAH 25C 14.8V one for each motor. The motors are rated to 16V and ESC's are rated up to 18V so we are within the power limits..The Dauntless will be a beast on14.8V and with the 1 3/4" props she should have a really nice wake coming from the back of the yacht and be up on plane. We are talking 'Yachts in a Hurry" speeds here.. 

I can't wait!!! I can almost taste it!!

(Picture Dauntless Here on a rainy day ) http://www.youtube.com/watch?v=OejMuAxE_vk

-Rich.




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RE: the unofficial home of the dumas dauntless - 4/25/2012 9:35 PM   
Rich404



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(2) 5000 MAH 25C 14.8V one for each motor. The motors are rated to 16V and ESC's are rated up to 18V so we are within the power limits..The Dauntless will be a beast on14.8V and with the 1 3/4" props she should have a really nice wake coming from the back of the yacht and be up on plane.  


Woops I take this back, I just re-checked the stats and a 14.8V = 18.5V fully charged. I am going to scrap the extra cell and stick with 11.1V because it is 12.6V.  So she will have 3S on the motors too. I will se if I can get  30-35C instead of 25C for the motors. The Krokers actually max out at 16V so we don't want to fry those gems.

-Rich.


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RE: the unofficial home of the dumas dauntless - 4/25/2012 10:32 PM   
dauntlessfan



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(Picture Dauntless Here on a rainy day ) http://www.youtube.com/watch?v=OejMuAxE_vk

-Rich.





Wow if only Dauntless had been as lucky as Aphrodite, handed off to those with the resources and know-how to keep her in pristine shape.

Looks like that boat displays a mast-mounted white 360 degree stern light as we were talking about a few pages ago. Didn't see a white bow light, though.

Did Dauntless have windshield wipers? If so I hope somebody can show us how to make some up . But then I'd have to install "glass" too... where's that to-do list?

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RE: the unofficial home of the dumas dauntless - 4/25/2012 11:32 PM   
Sound Sailor


 

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Status: offline 		Hey Rich, I like where this is heading! I want to be invited to the christening. ( not of the soon to be new heir but the boat)   When we taking them down to Queens?

I think I'll try to test the new props in Poughkeepsie over the weekend weather permitting. Need to try the lobster boat with the new ESC also.

Bill

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