is this motor ok for my 47" mono ?

[Mel279]

hi guy

I need your advise regarding the below motor, I was thinking of using the 1600kv motor with 5s setup...is that possible to push my big mono?

5840 tp.JPG

[rscheffer]

1600 kv is way to much. It wil toast almost any controler.
Better take a tp 5850 820kv on 2x10 s 5000mah http://www.youtube.com/watch?v=1HMJU...e_gdata_player
120 cm by 33.5 cm.

http://www.modellbaucenterlorenz.de/catalog/product_info.php?cPath=87&products_id=139

Or a 5850 600 kv on 1x12 to max 1x14 s
for this setups a etti 220 hv pro wil be fine.

Arround 25000 rpm under load is enough with a x457 or x460 octura.
Greatings Ramon

[Mel279]

hi Ramon

thanks for your reply, have you ever try it already? these are not like those small motor, I already have the tp 5850 820kv running 10s, Im thinking of trying using 1600kv with 5s setup and less weight compare to 10s setup

[rscheffer]

Weight is not an issue with these large hulls
With only 5 s the aps wil get to high.
Mine is 9,2 kg 115 cm 33cm wide buster mono lehner 3060 -10 2x10s5000 x460 prop 4,5 min full throttle 105 kmh runing a bit loose.....

http://www.youtube.com/watch?v=60U6GllQTBA&feature=youtube_gdata_player

Here is one of my Buster hulls build by a german tp 5850 920 kv on 1x10s witch results in max 2.5 min runningtime 100 kmh
My advise is always the 600 to 820 kv range because of the amps drawn

http://www.youtube.com/watch?v=x58Gi9_wCnc&feature=youtube_gdata_player

Now i am building a sv43 1.7 meter with 2xtp5850 600 on 4x10s 5000
Here is a french man who has build this boat with this setup already

http://www.youtube.com/watch?v=3zpqacQQu9E&feature=youtube_gdata_player

http://www.youtube.com/watch?v=YMZHfdk9rh0&feature=youtube_gdata_player

Gr Ramon

[Mel279]

Very nice,

Im not into making speed record, Im more concern regarding runtime as Im thinking of racing with those gasser with a decent speed, that longer the better without overheating the electronic system.

[Fluid]

If you want longer run time, go 10S. This cuts the amperage draw in half, meaning doubling the run time for the same speed. Even 8S is marginal for a mono hull that size if you want to keep up with the gassers and have decent run time.


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[Mel279]

If you want longer run time, go 10S. This cuts the amperage draw in half, meaning doubling the run time for the same speed. Even 8S is marginal for a mono hull that size if you want to keep up with the gassers and have decent run time.


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I've ran 10s with tp 5850 820kv, but still couldnt achieve the runtime Im looking for, maybe my motor is too high

[Fluid]

Two questions - how long do you want to run, and how many mAh were in the packs? I run a 750Kv motor in my 42" cat with 10S1P 6500 mAh packs and can finish a 6-lap gas race with full mill and cool down laps and only use 80% of the pack capacity. I am fast enough to have placed third in Open Cat at the World Championship gas race in Baytown last month out of a field of over 20 cats.



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[Alfa Spirit]

Why don' t you run a twin setup with a large hull?

2 x 4092 930kV, 10S x2 batteries

[iridebikes247]

Don't run twins in a mono under 50" just doesn't make sense to me. Have you given though to a castle 2028 on 10s2p? The motor is extremely cheap right now. The tp 5850s are great from what I've heard I would stay around 800kv. If you're set on the tp 5850 motor then run 10s2p. Leopard also makes a 56 110 motor available on this site for 220 bucks with a water jacket pretty damn good deal if you ask me.

[Mel279]

Two questions - how long do you want to run, and how many mAh were in the packs? I run a 750Kv motor in my 42" cat with 10S1P 6500 mAh packs and can finish a 6-lap gas race with full mill and cool down laps and only use 80% of the pack capacity. I am fast enough to have placed third in Open Cat at the World Championship gas race in Baytown last month out of a field of over 20 cats.



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If I can achieve 7mins would be great but that wouldn't be possible with my current setup, Im using 2p 10s with a total of 11600mah and a de-tounged x457 prop.

[Mel279]

Why don' t you run a twin setup with a large hull?

2 x 4092 930kV, 10S x2 batteries

too much work and doesn't seem fair for racing between thanks for the ideas though

[Mel279]

Don't run twins in a mono under 50" just doesn't make sense to me. Have you given though to a castle 2028 on 10s2p? The motor is extremely cheap right now. The tp 5850s are great from what I've heard I would stay around 800kv. If you're set on the tp 5850 motor then run 10s2p. Leopard also makes a 56 110 motor available on this site for 220 bucks with a water jacket pretty damn good deal if you ask me.

Yes Im using tp motor 820kv with 2p 10s, maybe I need like 750 - 780kv motor instead but I haven't dail in yet, seem to be hopping around at the moment.

[Alfa Spirit]

I stop building for other activities. Now I continue with this Fountain (4092-930kV-10S) x 2.


SUXFLY P1 42 2.jpg

[Fluid]

If I can achieve 7mins would be great but that wouldn't be possible with my current setup, Im using 2p 10s with a total of 11600mah and a de-tounged x457 prop.

The OP needs to get his boat tuned better, the hopping is very hard on the ESC and robs speed. He will never get 7 minutes of run time at a competitive speed - to do that he'd have to average just 75 amps, even with 10S that's just 2800 watts. Racing setups will seldom will run for more than 2-3 minutes and will average 130-150 amps or more.



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