wayn

My Feedback: (1)

Hi Ryan,is selecting the right servo for the boat important,or not, Like some servo's have metal cogs etc. I am setting up a 28 " fibre glass shovel nose boat with a feigao 540 xl motor , a etti 125a esc and i'll run 2 x 7.2v 4200 nimh batteries + metal rudder and stinger. So with this weight is it important to select a servo that can handle the pressure and force when the boat is in full power.
So what I am after is some idea's of the servo I need.
Cheers To All Wayn

ryan_t888

Yes, it is important. But choosing the wrong servo will not destroy your power system.

On your hull you could get away with running a standard servo up to around the mid torque servo range. During a crash a metal geared servo may stand up to more abuse as the rudder hits the water at different angles.

When I purchase servos I always try to stick with standard sized servos. I pay all attention to servo torque mostly, and secondly servo gearing, BB, and digital. Speed is never a concern.

Ryan

WO

Ryan:

I keep trying to send you photos of my new sk daddle. Did you get them? wo

ryan_t888

No, I have not.

Ryan

WO

Ryan:

Here are three photos of my sk daddle hull. Warren

WO

Ryan:

After running my sv 27 I was thinking of using a sub surface drive on my sk daddle as I don't plan to race anybody and all that stalling must be hard on the motor at take off. Any comments would sure help.

Warren in the Desert that does not burn as it is just sand and scrub.

ryan_t888

THe motor actually unloads on take off and increases in load when on plane. This only happens once per run for me. Go for sub surface if you wish.

Ryan

WO

Ryan:

After looking at all the boat pictures in the forun almost no person is using anything except surface drives so I will use this system too. Warren

WO

Ryan:


My sk daddle now has a speedmaster stinger installed and I just need some wire and a jr switch to test it. Warren

WO

Ryan:

My SK DADDLE is done but my Baracuda 80 will not start the motor it just makes lots of different sounding beaps. I tryed calling Castle Creations but stayed on hold for a long time and hung up. Got any ideas? Warren in the desert

ryan_t888

You can program it using the transmitter. Follow the steps in the manual to do so.

Ryan

WO

Ryan:

I am using 14 cells on my sk daddle with a Baracuda 80 esc. The instructions say to use anything higher that 12 cells cut the red wire going into the radio reciever. When you do that you have no power so I connected a battery to the receiver as they say in the instructions to connect a battery to the wire going into the receiver which will not work as the red wire is already cut. The esc just beeps and flashes and I called Castle and stayed on hold for about 20 min and hung up. I called my dealer and they told me to keep reading the instructions and call the company. I have used up all my brains and one hole day so I thought I would ask you as you are the King of FE. Warren

ryan_t888

I wouldn't actually cut it. Just push the red terminal out using a pin.

Your ESC plugs into channel one for example. Your RX pack plugs in to the batt channel. At this point you should be able to turn your steering servo to confirm the RX has power.

Ryan

WO

Ryan:

I found the problem as the Baracuda does not like 2.4 gh radios so I used my two channel HiTec surface radio and it started right up. The directions are reversed but I will find my way around that or just run it that way. A very nice member of our club showed my a small pond that is 120 feet square that I can use any time for nothing. I tried my small tower boat and it has enough room to get a fe going then you will have to lift the throttle and turn. But I can use it any day and the other optiin is Lake Hemet about fifty miles away that you can run anything on and no one *****es. Will give you a full report on the sk daddle with a 600 Kontronik and baracuda 80 after monday. Go fast or go home. Warren

WO

Ryan:

I am ready to fly with all of your help. warren

WO

Ryan:

What would be the correct prop for my sk daddle with two seven packs and a Krotronik 600 brushless motor as the boat weighs about 4.5 lbs. I tried a two blade 38 on my sv 27 and I did work just cavatated more. Warren

ryan_t888

What kv is the motor?

Ryan

WO

Ryan:

The Kontronik 600 is a 1700kv and will fly a 60 size airplane with ease. I have used their motors before and they are of the finest quaity I have used and equal to a Hacker I have been told. Warren

ryan_t888

40-42mm and work your way up from there.

Ryan

WO

Ryan:

I float tested the sk daddle in my tub and it leaked a little too much so I sprayed the back with spar urathane and got it stoped. No it is raining and cold by our standards 62 during the day and too windy to fly. How is the weather up there? Warren

WO

Ryan:

I downloaded the instructions from grim racer on ballancing props and clean up all of my props and when I was working on the last one my favorite 3 blade 40 by 52 gr I saw some casting marks on it and looked at then with a eight power tube maganifier and they were ugly. I used some 60 grit sand paper on then and finished up with 200 grit paper. I kept spinning the prop to see if my marked blade was heavy and it did not stop at the bottom but was left or right most of the time. How do you tell when a 3 blade prop is ballanced? Warren in the desert

LouDog

Ryan I have a question for you. I am new to Lipo as well as building. I am currently building a Titan29 and have a Feigao 540 XL 9X. Paired with a CC Hydra 120 ESC. I want to run 6s. A. Is this possible, with the engine and esc selection, and b. if it is would it be better to run 2 3s or 1 6s? Thanks for your advice and support to this site.

ryan_t888

WO there's a balancing prop thread stickied some where in the boating forums.

A 9XL on 4s would work very well. A 9XL on 5s is pushing it pretty hard. I would not try 6s on the 9XL if you plan to keep the setup for more than one run.

Refer to this section

Running 2 3s packs vs 1 6s pack has no performance difference provided all packs are equal. 2 3s packs may give you flexability in battery placement with in the hull, charging capabilities and use of 3s or 3s2p in another boat.

Ryan

WO

Ryan:

I tested my sk Daddle 36' today and it does not leak but the nut on the motor came loose and with two 6packs and a sv 27 stock prop the boat would not move and I took it out of the water to check the motor and it was a little warm. I ran my other two boats and called it a day. When I got home I found the nut loose when I greased the prop shaft so I will try another day. I have a two blade prop that is 44 mm and I think this will help as I could just see the top of the prop when the boat is in the water. This boat is too heavy for two six packs and a 45 esc, It will not cut it so I looked your forumula up again and will order two 3 cell lipos and a 120 amp esc plus a 42 mm prop to start again and not have a fire. The boat with batteries is probally 5.5 pounds and sv 27 guts will not cut it. Follow the rules and have a nice day. Thanks a million.

Warren

LouDog

Yeah, I was wondering if that would be pushing it a little.
Thanks,
Lou