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Its a 28mm motor 
But I have a few 20mm motors around.
But I have a few 20mm motors around.
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Attached are some pics of one of my Carbon Fiber starships that I put a 2848 Brushless inside. I use a 3S LiPo about 2250 mAhr capacity. The motor is rated at 3800 KV and is water cooled. I have modified a Castle 80 Amp ESC for water cooling and installed the receiver in the orange balloon. I have 5 different props that I am experimenting with for this rig.
The second pic shows the modified front sponsons. This was done for straight line speed as recommended by some of the hot FE SAW recorder holder guys. The sponsons are balsa but have a strip of thin, lightweight plastic cutting board material bonded to the bottom with extended trailing edge. I think this height is a bit too much and will experiment with cutting it down a bit. Additional weight was added to the front and it varies depending on water conditions.
There is still lots of trimming to do but the boat is fully instrumented with an Eagle Tree so I can monitor performance as I change things. This is a great toy to experiment with.Comment
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How did you fit the 28mm motor? The diameter with cooling jacket would be too big to fit into the existing motor mount?Mini Cat Racing USA
www.minicatracingusa.comComment
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Ah I wasn't aware that it was a Tenshock motor. Well I'm very happy with that since they are great motors.Comment
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How much faster does it go with the modded sponsons?Legend 36 sailboat, KMB Powerjet Ed Hardy Viper, ABC jet pwrd BBY Oval Master, ABC Hobby Jetski, NQD Tear Into's, HK Discovery 500, MickieBeez pwrd Jet Rigger!, Davette/Gravtix jet sprint, KMB Powerjet Pursuit, NQD pwrd Jet Catamaran!,Steam pwrd African Queen, Sidewinder airboat, Graupner Eco PowerComment
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Good question but I have not dialed it in enough to go full throttle and find out. I believe the sponsons are a bit too high and need to be cut down about 1/4" inch. It has a bit too much bow lift now. This mod was recommended to me so that there would be more air under the hull when using a newer, more powerful motor. Now, at 2/3 throttle it is uncontrollably fast. (These SAW record holders really know their stuff!)
The stock motor for the carbon fiber and I also believe fiberglass Tenshock Starship is their TS-N1025. This is a great little motor with a 22 mm dia and a 40 mm length weighing in at 70 grams. It can handle up to 18 A continuous and 30A for short bursts. The stock KV is around 3200 and was mentioned in a few previous postes you get a "hop-up" motor that was identical in size but runs at 4200KV. (TS-N1025*13)
I actually put in a much larger motor, in fact the weight is double at 153 grams with water cooling jacket. It is 28mm dia (33mm with jacket) and 48 mm long. It will handle 40 A continuous and over 60A in bursts. (This is why I use a water cooled Castle 80A ESC). The KV is about 3900.
It was a bit of a job getting this larger motor in as you can imagine, BUT, it can be made to fit. In fact you can even get a larger one in with a few more mods however the extra weight becomes more of a problem.
The sponsons are made from balsa and do provide additional flotation to counter-balance the additional 83 grams of weight for my larger brushless inrunner.
I can still mount my EagleTree system in the hull to monitor performance as things change...but it is a squeeze and all the planets have to be aligned to do it! Will keep the forum posted on my "tweaking" process.Comment
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If it's the motor I'm thinking of http://www.hobbycity.com/hobbycity/s...WaterCooled%29 it is a good motor. The one we chose for racing the ABC Jet Ski's. We're running 5000mah 2s lipo's and the run times are exhausting. Will be trying half that size battery to save weight.
Legend 36 sailboat, KMB Powerjet Ed Hardy Viper, ABC jet pwrd BBY Oval Master, ABC Hobby Jetski, NQD Tear Into's, HK Discovery 500, MickieBeez pwrd Jet Rigger!, Davette/Gravtix jet sprint, KMB Powerjet Pursuit, NQD pwrd Jet Catamaran!,Steam pwrd African Queen, Sidewinder airboat, Graupner Eco PowerComment
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That is exactly the motor. I have had lots of success with it but found it to be very reliable. For the price it is hard to beat. In the Starship the largest battery I can fit in is about 2250 mAhr. I still get good run times. Larger battery than that I will have to tow the bigger LiPo is a trailer behind the Starship!If it's the motor I'm thinking of http://www.hobbycity.com/hobbycity/s...WaterCooled%29 it is a good motor. The one we chose for racing the ABC Jet Ski's. We're running 5000mah 2s lipo's and the run times are exhausting. Will be trying half that size battery to save weight.Comment
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That is exactly the motor. I have had lots of success with it and found it to be very reliable. For the price it is hard to beat. In the Starship the largest battery I can fit in is about 2250 mAhr. I still get good run times. Larger battery than that I will have to tow the bigger LiPo is a trailer behind the Starship!If it's the motor I'm thinking of http://www.hobbycity.com/hobbycity/s...WaterCooled%29 it is a good motor. The one we chose for racing the ABC Jet Ski's. We're running 5000mah 2s lipo's and the run times are exhausting. Will be trying half that size battery to save weight.Comment
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I will try to send along some pics. Most interesting is the extended section of "cutting board" material on the bottom. It has a satin finish, like a light hull sanding with 400 grit. The extended tab of this material appears to act as a type of "shock absorber" for small waves. I painted these balsa sponson extensions white so I could observe their position at speed. The boat actually seems to "flutter" on the back tab of the cutting board material extension on the sponson. This is just my guess based on observation but I welcome any recommendations or suggestions.Comment
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Use good hatch tape!!
Lost my Starship today was romping along when it suddenly took a dive and did not come up. In hindsight should have brought it in as the motor was gliching which is what I think started the dive Anyway was using no name hatch tape............Boat is gone I suspect that "loose" bits of tape at speed caused tape to peal and that let the water in.
Anyway thought I would warn other Starship drivers it was an expensive lesson for me.
( boy it was a fast one though!!)
PeterComment
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Sorry to hear about your Starship!!
Remember to ALWAYS put flotation in any boat! I always use swimming pool noodles and cut up pieces I can fit/glue into the hull and under the hatch.Mini Cat Racing USA
www.minicatracingusa.comComment
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Yes I use the same thing pool noodle on my other boats but as you are aware there is not much spare room in a Starship to put anything in.
In hindsight probably could have jammed some on top of the battery once it was in and connected that is about the only place. Not much room there but it might have been enough to save it. Problem really i think was the hatch tape being el cheapo and I should have quit when I noticed the motor cutting in and out.
As they say hindsight is 20/20 just wanted to post to warn other Starship users as it was an expensive mistake on my part.
PeterComment
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