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RE: RTR Boats - 12/4/2012 1:24 PM   
martno1fan



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Status: offline 		Best system ive used hands down is FUTABA FASST in my experience but like i said i sold mine to change to flysky after trying it with great success.I dont know of anyone who has had any issues with the Fasst system i even kept my antennas inside the radio box.Friend paid a lot of money for a spektrum radio and almost lost his boat the first day,they admited there failure but this was only after several years of people coming on this and other forums crying because theyd lost there boats and couldnt understand why.Thats the reason they finally came out with the marine rx,sory but to me it was too late, the problem was arround for along time before anything was done.

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RE: RTR Boats - 12/4/2012 3:27 PM   
StevL


 

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Status: offline 		Don't want to beat a dead horse but does anyone know if the Spektrum "Marine" Rx is DSM, DSM2, DSMX???

I'm off to research.... Thx!

BTW: Have started a conversation with Jan at Kintec Racing about a Zonda.... may be my ticket. (changed to Kintec not Kenetic)


Steve

< Message edited by StevL -- 12/4/2012 5:15 PM >

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RE: RTR Boats - 12/4/2012 4:45 PM   
siberianhusky



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RE: RTR Boats - 12/6/2012 1:23 AM   
StevL


 

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Status: offline 		Does anyone know where Kintec Racing is located (city, state)? They are in the US?

Thx,
Steve

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RE: RTR Boats - 12/10/2012 10:45 PM   
StevL


 

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Status: offline 		All done, the Zonda is ordered, my new Spektrum surface radio is here (with Marine Rx)..... will report back after I make the first runs. Thanks for the input, very much appreciated.


Steve

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RE: RTR Boats - 12/11/2012 9:23 AM   
martno1fan



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Status: offline 		Hi Steve good luck with it m8,im a dealer for the company who builds the Zonda,havent seen one in person yet interested to hear what you think of the quallity.
Mart

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RE: RTR Boats - 12/19/2012 11:30 PM   
StevL


 

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Status: offline 		Zonda arrived today! Really looks like a quality build and Jan (Kintec Racing) did an excellent job. Waiting for some bullet connectors to arrive then off to try her out. I'm guessing the 26th... this is going to be fun!


Steve

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RE: RTR Boats - 12/26/2012 10:31 PM   
StevL


 

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Status: offline 		As promised here is the Zonda RTR as supplied from Kintec Racing. I did decide to use dual antennas since it's carbon fiber, removed the Zonda vinyl from the forward deck, put a little thread lock here and there (just making sure). Also used PRC6 (6mm) bullet connectors.

More photos to follow after the maiden this weekend.

Steve

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RE: RTR Boats - 12/26/2012 10:36 PM   
martno1fan



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Status: offline 		Good luck with the maiden,not sure about the water piccups though i prefer them in the rudder or install flush ones in the sponsons,less drag also.
Mart

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RE: RTR Boats - 12/27/2012 3:22 AM   
StevL


 

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Status: offline 		Used this type of water pickup years ago on nitro boats & it worked great, the good thing is if it's a problem just install a dual intake rudder, maybe a 10 minute fix. Charged batteries tonight so I'm hoping to play tomorrow or Friday.


Steve

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RE: RTR Boats - 12/27/2012 9:46 AM   
martno1fan



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Status: offline 		Not saying they dont work for water but youd be surprised how much drag they are causing.

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RE: RTR Boats - 12/27/2012 5:06 PM   
siberianhusky



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Status: offline 		I'm also not so sure about those pickups, not a way I'd do it, spent enough time chasing down handling issues on a mono that were due to pickup drag from a similar setup. Changed to a pair of under hull pickups and it was like a completely different boat. Could not get the hull to stop running wet, tried everything then changed the pickups and the problem was gone just like that.
Been a long time since people used that pickup idea, don't even see prop wash pickups anymore, people discovered how much drag they create.

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RE: RTR Boats - 12/28/2012 1:10 PM   
martno1fan



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Status: offline 		Your not wrong a guy here is running one of my Arrow 57 hulls with piccups like this and his runs wet,ive told him umpteen times they are the reason its running wet.Some people just dont listen though,hes still not changed them,funny thing is he has a dbl piccup rudder and isnt using it for cooling .
Mart

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RE: RTR Boats - 12/28/2012 3:07 PM   
Mikeup


 

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Status: offline 		Gentlemen; Mr. Pompbled from Sneed, Netherlands uses the under the hull pickup that has 2 nozzles in one unit pickup. Now he says the 1 nozzle is for pickup and the other is exit and from what i gather is the pickup side sucks water from exit, so you have a consent flow. I read this, this past summer on another forum. I got a 29" mono from BBY and it had a under the hull system. Now if the drought can end, i can run my boats. Now everything like river beds and flood control dams will get some moisture as they are at record low levels.

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RE: RTR Boats - 12/29/2012 12:40 PM   
captncrunch1234


 

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Status: offline 		The tube pickups by far cool better then a rudder pickup something like 3 or 4 times more flow. The only people having trouble with them have them to far into the water. They should be set just above the bottom of the hull not sticking down in the water. Why do you think Aquacraft got rid of the rudder pickup and went to a tube pickup when they upgraded the SV27R. More cooling = cooler electrics = larger props = more speed.

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RE: RTR Boats - 12/29/2012 1:25 PM   
martno1fan



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Status: offline 		Anything sticking into the water causes drag so just use the rudder piccups,open up the piccups if you need more flow and more than enough water,no need for tubes hanging in the water its an outdated idea.
Mart

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RE: RTR Boats - 12/29/2012 1:46 PM   
siberianhusky



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Status: offline 		Never had an issue with flow from a rudder pickup that was set up properly, same with the flush under hull setups.
The system is only going to flow so much for a given speed considering the restrictions at the motor and esc nipples.
The smallest diameter in the ENTIRE system is what determines the flow rate, a 1/8 inlet at 40 mph is not the determining factor, it's the 1/16 diameter inlet hole in the motor or esc cooler at 40mph that determines the flow.
There are a number of on-line flow rate calculators where you can plug in the velocity and diameter and it will spit back the flow rate.
A 1/16 restriction at 40 mph will flow just about 4.5 cubic feet/hour
1/8 is about 18.
Hanging larger diameter stuff down into the water will not increase the flow of the entire cooling system, might as well size things to the size of the smallest restriction.
LOL Do you honestly believe that was a performance choice on Aquacraft? I have a couple of their boats, the choice was based solely on the bottom line, Probably costs a nickle less for the plastic & brass pipe pos water pickup!
On my Motley crew I installed an old SV rudder blade for the water pickup (direct swap) and ditched the sponson mount, the temps actually went down a couple of degrees on the esc according to my eagletree data logger! I mounted a water outlet on the side so I can see it when I pass by, there is a more solid stream of water with the rudder pickup, it's always in the water where as the sponson pickup spends a fair bit of time out of the water due to chop from other boats or wind waves.
I find under hull flush mount pickups work well on mono hulls when mounted right at the transom as low on the vee as possible.
What Mr. Pompbled is talking about I believe is called a gunderson style pickup, If I remember right they flow at a very low pressure because of the suction of the rear facing outlet, I'd actually like to try one some day, the theory behind them is very solid.
A few minutes spent with a file or dremel can make a huge difference to how the pickup on cheap chinese rudders function, and pull the nipple off the top to make sure all the chips from drilling are removed. They just run a drill into the stock, thread a hole and pretty much call it done, a little smoothing goes a long way, also properly sharpening the rudder makes a huge difference, every chinese rudder I've seen has had a blunt leading edge, creates a lot of turbulence.

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RE: RTR Boats - 12/29/2012 3:59 PM   
martno1fan



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Status: offline 		On a side note and in line with what your saying i allways open up the nipples on my motors cooling jackets and rudders even on my gas motors i open up the nipples with the next size up drill bit to increase flow,never had an issue with rudder piccups to be honest.
Mart

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RE: RTR Boats - 12/30/2012 9:32 PM   
twissted


 

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quote:

ORIGINAL: captncrunch1234

The Zonda will do 60 out of the box if you change the props to a larger size.



I have this boat and it is fsat and looks great. It uses kevlar in it's construction so it will hold up. You can always add dracing inside using 2 part epoxy. I building a 1420mm Gennesis hull at the moment and that is what I'm working on at the presant.



Zonda's are 42" long.

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RE: RTR Boats - 12/30/2012 10:24 PM   
StevL


 

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From: Irmo, SC, USA
Status: offline 		We had a maiden.... the pros and the cons;

Pros:
The Zonda is very stable
Everything worked perfectly
Rooster tail was impressive
Pretty long run time

Cons:
Not all that fast (read below)
Lost a lot of speed in the corners (more than I expected, read below)
Little water in the hull after each run (not sure where it may have come from as the hatch is taped down, maybe the drive tubes?)

Now here is the catch;
We have had some high winds (gust up to 50) the day before yesterday. Yesterday we decided to run a couple boats on their maidens. Since is was cool and still breezy we decided to run on a 5 acre pond near my home, after all, we were only going to run them twice. When the boats first launched they looked pretty good, by the time we turned them back both boats looked like they had an anchor out. I brought the Zonda in very close to take a better look (at very slow speed) and noticed a lot of pinestraw gathered around the rudder. I came in and cleaned it off, less then a minute later the anchor was back on. We couldn't run for a full minute without having pinestraw problems, and you couldn't see any straw other than on the edges of the pond. Oh well, next time I know will be better, how much better is the answer I'm looking for.

Steve

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RE: RTR Boats - 12/30/2012 10:29 PM   
StevL


 

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quote:

ORIGINAL: captncrunch1234

The Zonda will do 60 out of the box if you change the props to a larger size.




Which size (and brand) prop would you suggest?


Thx,
Steve

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RE: RTR Boats - 12/31/2012 10:35 PM   
StevL


 

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Status: offline 		Update:

Ran her again today in clean water just a slight 2" chop.... speed was way different. I'm very happy now! I have no idea how fast she is running but my best guess is about 50 maybe a notch or two higher. Still very stable but I did blow her over twice, both times she came to rest right side up

The Zonda is a good boat for someone like me, RTR, strong, reliable, and fast enough to have some fun with other boaters. I would still like prop suggestions and I may be going to five cell sooner than later


Steve

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RE: RTR Boats - 2/5/2013 7:11 AM   
Young goof


 

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Status: offline 		 Zippkits.com riggers the only way to go 21fe I think, there's a guy that will build it for you.then
you buy the stuff through it in then I tell everyone to suck your wake 


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RE: RTR Boats - 2/5/2013 2:25 PM   
siberianhusky



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From: Peterborough, ON, CANADA
Status: offline 		Check all the water line connections and the cooling jackets for leaks, I pressure test them before maiden runs now, had an Aquacraft jacket leak in my LS hydro, wouldn't leak until it had a fair amount of pressure in the system. I just use a 500cc syringe, massive thing, got it from a beef farmer buddy.
You can get small spring clamps to secure water lines to their fittings.
If that checks out you can put a small length of large diameter silicon fuel tubing over the inboard end of the stuffing tube, half on the tube and half on the flex shaft to act as a seal.
Hope this helps out a bit with the leak issue

LOL no idea what that gibberish in the previous post is about.

"Zippkits.com riggers the only way to go 21fe I think, there's a guy that will build it for you.then
you buy the stuff through it in then I tell everyone to suck your wake "

Sad reflection on the current education system.

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