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Author Topic: Lesro Javelin  (Read 15374 times)

zooma

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Re: Lesro Javelin
« Reply #275 on: May 27, 2021, 10:59:02 pm »

Hi Zooma


The 3648-1450kv works better on 3S and is a beast on 4S !!!
Try series up the 2S batteries if the ESC can handle it and drop to a 40mm prop to start with.


Canabus


Thanks Harry,

The 3648 is almost the same diameter as the 3864 but is quite a bit shorter?  I don't know what sort of difference that will make?

I will try the closest size that I have to yours (3864- 1580KV) on an S40 prop to start with and see how it goes. I hope it will run well enough and (with some luck) it will give me longer run times than I get with the Turnigy in Rapier1 (same hull).

I bought the 3864-2250KV motor on your recommendation some time back as a rival for the Turnigy 3648-1450 out-runner (as it is no loner available) to use as an alternative "powerhouse" motor that may be able to rival the out-runner for outright speed. 

At the time these motors were only £20 each so I bought one a month so I have the three sizes mentioned to see what works best in the Javelin and they will also have future homes in the Swordsman and Rapier2. With some luck I will find one that will be best suited to each hull.

The Turnigy out-runner goes really well on a two cell pack making it fast enough for our club lake and really "interesting" on three cells and likes running on a S50 or an X50 prop - but to be honest it makes little or no difference what prop I try with this motor in Rapier1 - it just goes!

Do you have any suggestions regarding propeller sizes (to start with) for the three new motors driving the 39" LesRo hulls?

3674-2250KV......

3674-1900KV.....

3674-1580KV..........S40  ?

Enjoy your weekend!

Bob.
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zooma

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Re: Lesro Javelin
« Reply #276 on: May 27, 2021, 11:07:01 pm »

Hey Bob thatís distinctive red paint! If I got my finger out and finished my Javelin I could give you some useful data on the inrunner that I have at 1900kV!  {-)


All you need is an old tin of non-drip paint and a 6" paintbrush and you could be ready to run in no time   O0
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Backerther

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Re: Lesro Javelin
« Reply #277 on: May 28, 2021, 09:21:34 am »

Hi zooma;


You have been doing very good jobs so far with Lesro Javelin and I feel you are facing very serious matters of what to select
for the drive system for the essentially important points for the RCed higher boat.
Here are the pics of my way for my Jupiter F-99(1m long) which is nearly the same length as yours of 39 inch long.
I put here the pictures of my combinations of drive system for the JupiterF-99 only for your reference.
She is a semi-scale cabin cruiser and therefore not intended for speed-seeking boat at all, but intended for a compatible speed with her graceful appearance.!! O0 %%
1;As for the motor,capable of producing 2200 KV and 1200watts
2;The batteries are 3S 5000mAh class by which she is able to run about/over 15 minutes each and  have 4-6 packs.
3;I could enjoy the sailing with these batteries nearly a day including chatting times with some fellow modelers.. {-) O0
4/5;The prop is 46mm dia with P1.4 perhaps???which I'm not sure.. {:-{
6;She could go on the rough surface of the lake by the north wind in the -mid winter like this. O0
7;My Jupiter cruising on a calm surface in a certain December..


Please feel the sailing scene and atmosphere by the following video,though the speed is not so fast but I am satisfied with this level as she is not a racer but a queen of the lake at this time.!! {-)


taka's model boat **Mr SKG's JUPITER 2 - YouTube
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zooma

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Re: Lesro Javelin
« Reply #278 on: May 28, 2021, 05:58:29 pm »

Thanks Backerther - that gives me a starting point for the 2250mah motor - I will try a 45mm prop first on 3 cells and see how it goes.
Stay safe,
Bob.
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zooma

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Re: Lesro Javelin
« Reply #279 on: June 04, 2021, 09:01:11 pm »

As I was manhandling the stand for the Javelin around in the air during my efforts to paint it (brush in one hand - stand in the other) I clouted the back end of the Javelin cabin side and snapped it off!  >:-o

I have glued it back on again and added a couple of brass pins to strengthen the repair.

It is not easy to move about without unintentionally bumping into something now and again in such a small shed(workshop) as mine, and I am usually lucky enough to get away with it - but not this time!

As I have not finished painting the stand yet (!)  I have also added some brass pins to the other side.............because you never know.....
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tonyH

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Re: Lesro Javelin
« Reply #280 on: June 05, 2021, 09:40:37 am »

While painting the Stand?
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zooma

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Re: Lesro Javelin
« Reply #281 on: June 05, 2021, 10:10:13 am »

How embarrassing!  <:(
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Stuw

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Re: Lesro Javelin
« Reply #282 on: June 05, 2021, 01:09:12 pm »

At least you are busy working on your boat. Mine hasnít succumbed to any recent self inflicted damage as Iíve been busy doing other things. I did manage to drop mine on the floor and break off the rubbing strip point at the front a few weeks ago!


Yours will be like new again soon. One does feel daft though!
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2 Lesro Javelins... and thatís it. Not even close to finished!

zooma

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Re: Lesro Javelin
« Reply #283 on: June 05, 2021, 01:47:37 pm »

Thanks Stuw - you make me feel a little bit better !   :-))
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zooma

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Re: Lesro Javelin
« Reply #284 on: July 05, 2021, 09:50:39 pm »

I have completed the repair of my self-inflicted damage so I can now look forward to making some more progress !

The motor mount has been fixed into the hull with the water-cooled alloy motor mount to keep my motor options open for the future.

As a matter of interest, Harry let me know that the Turnigy 3648-1450 is now available again from Hobby King :-))

I have checked, and they have them here in their UK stock too!

This is a monster power motor  - and not expensive either. It will shove the Javelin along at least as quickly as it does in my Rapier on 2C and on 3C it will probably grow a pair of horns and at 4C...................it will be very fast!

.............just a thought - if you have enough water to take advantage of it.

Unfortunately our water at Southport is too small to make good use of this motor (even on 2C) and is why I am running the smaller (slower) Surpass motor at the moment  -  and to be courteous to the other club members who don't want their nice scale models being swamped in my wake! 

But, I have been known to go to the lake on a non-club day when the taps can be opened-up without causing any problems or upsetting anyone, and then it is only the size of the lake that can become the restricting factor !   O0
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