Wild thing mono kit build

[moparbarn]

so true, terry. i feel priviledged to race with john here in d-12

!! he (& many others) have taught me so much.

john, "glue in the water" - are you testing in that thick azz water in greensboro?

 

[John Finch]

Terry,

I data logged on a castle controller before I blew it up, then on my swordfish before I blew that one up. Have not used the Eagle Tree yet. These products worked well by the way. It was my ignorance that took them out. Pushing boundaries beyond specifications.

Robin........actually the lake behind my house has had a lot of boilogical growth. I stopped testing there this fall. I blew up a third controller because the water pickup got filled with algie. A lot of that green stuff grows in the water down here in the South. Our SAW pond sometimes gets that way too and looks like a bowl of pea soup. Right now both ponds are clear but a bit on the hard side.

John

 

[Mike Byer]

Mike,

I pulled some data logging from past runs and expanded them so I could make a better evaluation. I noticed, only after expanding the chart to cover the 2.7 seconds that I was at full throttle, taking up the whole chart just for that time frame........I was turning an average of 34,150 rpm at 242 amps at 18.85 volts (6s)with a 2500 kv motor. That equates to 3.14 volts per cell while at full throttle. When I plugged in those figures the slippage came out to 25 percent for that run. I did another chart from another run and pulled the voltage down even further. Voltage = rpm. I guess I need to work on pumping those batteries up just before the run when running SAW. Still figuring it out one piece at a time. Heat racing motors with lower kv ratings are much more efficient.

John

A rigger with less hydro drag would be easier on the electrics than say a cat or a spt hydro?

 

[Don Ferrette]

Mike,

I pulled some data logging from past runs and expanded them so I could make a better evaluation. I noticed, only after expanding the chart to cover the 2.7 seconds that I was at full throttle, taking up the whole chart just for that time frame........I was turning an average of 34,150 rpm at 242 amps at 18.85 volts (6s)with a 2500 kv motor. That equates to 3.14 volts per cell while at full throttle. When I plugged in those figures the slippage came out to 25 percent for that run. I did another chart from another run and pulled the voltage down even further. Voltage = rpm. I guess I need to work on pumping those batteries up just before the run when running SAW. Still figuring it out one piece at a time. Heat racing motors with lower kv ratings are much more efficient.

John

A rigger with less hydro drag would be easier on the electrics than say a cat or a spt hydro?

Even a cat or sport hydro has less drag than a mono. I have done FE rigger, cat, sport hydro and scale and all were about the same set up wise, calculations, etc for me. The monos apparently require much more attention to detail if you really want to push the limits because of the far larger wetted surfaces and what it takes to break free of the surface meniscus (water tension).

 

[Mike Byer]

looking at a 4082 motor 2000kv and a 200 amp controler, would this be a good place to start?

mb

So i wonder if this package would be good for a spt 40? How do you decide the size of the motor body and length for the size of the boat?

 

[John Finch]

Don or Mike could answer that better than me as I am new to the electric stage. Don??? Mike L????

You may want to post the question in the electric forum.

 

[Don Ferrette]

NEU 1527 1Y motor on 6S would be my choice.

 

[Mike Luszcz]

I agree with Don..right on the money. Mike

 

[BobBonahoom]

John,

My 32 inch, 21 Wild Thing (ML) is coming together. I can't find anyplace in the plans that mentions where the center of gravity should be. Can you advise?

Thanks,

Bob

 

[Curtis Beaumont]

John,

I would also like to know, I am building mine from plans rather than the ML kit. I see where the center of the flywheel is on the plans at 11" from the Transom. The instructions from the Boat Modeler say install the engine 12.5" from the transom (not sure where on the engine that would be referenced to). I lined my engine up on the flywheel pulley, but not sure where to balance once it is all together.

Thanks,
Curtis

 

[BobBonahoom]

Curtis,

The 12.5" dimension refers to the center (glow plug) on the engine.

I can't figure out how to fit an 8 oz tank in the side. Plenty of room in front of the engine, but John suggests the side to help keep the CG steady as the fuel drains. Makes a lot of sense, but I may have to make custom tank to get it to work with the ML kit.

 

[Ray Sametz]

Curtis,

The 12.5" dimension refers to the center (glow plug) on the engine.

I can't figure out how to fit an 8 oz tank in the side. Plenty of room in front of the engine, but John suggests the side to help keep the CG steady as the fuel drains. Makes a lot of sense, but I may have to make custom tank to get it to work with the ML kit.

Bob, Ryan's doing 3 tanks for me now. Make you anything you need.http://lipgensfabrication.com/

 

[BobBonahoom]

Ray, good idea! I forgot about Ryan. I actually have some of his plastic tanks.

 

[John Finch]

John,

My 32 inch, 21 Wild Thing (ML) is coming together. I can't find anyplace in the plans that mentions where the center of gravity should be. Can you advise?

Thanks,

Bob

9 and a half inches from the transom is CG.

 

[BobBonahoom]

ML "Wild Thing" is ready to test. Highest quality kit I have ever seen.

 

[eekern]

Looks good bob! Jullian is starting to assemble a 20 seaducer so along with curtis, b mono should be a big and fun class...

 

[David Bryant]

ML "Wild Thing" is ready to test. Highest quality kit I have ever seen.

very nice! Which engine? Nova Rossi .21?

 

[Curtis Beaumont]

Eric,

What is Julian putting into the SD? It will be good to get this snow and ice off of the pond. Should be a great year with stocked classes.

C

 

[BobBonahoom]

Yes, an old Novarossi.

 

[John Finch]

Looking good Bob. Let us know how it works when the ice melts on the pond.

John