Topic: Aero Naut Jenny (Read 13602 times)

Daleb · « **on:** January 20, 2017, 10:11:42 pm »

Hi all,
I'm looking for advice on motor, battery, esc and prop size for my Aero Naut Jenny build. I'd like it to have plenty of get up and go when needed but not silly fast and with a reasonable run time. Has anyone built this kit or something similar? She is based on a 1930's gentlemans racer and 730mm in length.

Many thanks, Dale

martno1fan · « **Reply #1 on:** January 21, 2017, 08:29:53 am »

Check this one out lol.
https://www.youtube.com/watch?v=KoJKWj1F9Ww

martno1fan · « **Reply #2 on:** January 21, 2017, 08:34:20 am »

To answer your question something like the setup this guys running would work well hes using Turnigy 540 L inrunner 1350 KV ,120 amp esc on 3 s.
https://www.youtube.com/watch?v=Rd9T95uZ8KY

photo album with info on setup .

https://get.google.com/albumarchive/106928653253683342269/album/AF1QipO_278iJwdJ8XK20WkIbSx64Q3_1j8xjgwjJlTn?source=pwa

martno1fan · « **Reply #3 on:** January 21, 2017, 08:49:41 am »

This motor is on at a good price at the moment and while its got more than enough power and is rated upto 6s if you run it on 3 s i think it should work well and be fast too.
3 s would work out around 15 k rpm so well within its limits and around 20 mph depending on what prop you use,but this motor would be capable of swinging most props

.

https://hobbyking.com/en_us/turnigy-aquastar-3660-1700kv-water-cooled-brushless-motor.html

Daleb · « **Reply #4 on:** January 21, 2017, 09:17:24 am »

Hi martno1fan,
thanks for the reply and info and links. I do like the blue hull combination (video) and it's certainly got some get up and go

I was hoping to avoid water cooling if possible as this is my first build of this type of sports boat and have never installed that type of motor. Much to learn and think about.

martno1fan · « **Reply #5 on:** January 21, 2017, 11:49:55 am »

Water cooling isn't a big deal and i would think preferred in this boat as theres not a lot of room so things would get hot quite quickly and i don't think having air getting in would be a good idea in case the boat flips over so an outrunner wouldn't be my choice in this hull.
You can make some water scoops under the hull using brass tubing or you can buy them,they just go underneath and catch the water as the boat moves and they work really well.

martno1fan · « **Reply #6 on:** January 21, 2017, 12:24:54 pm »

By the way you wouldnt need a 120 amp esc as he used you could probably get away with a 60 amp but seeing as the 90 amp escs are so cheap id go with that,you would however need to reduce the reverse input some if it has reverse with the brushless motor or you could swamp the boat when hitting reverse

.37-40 mm prop should work .

Daleb · « **Reply #7 on:** January 21, 2017, 05:02:50 pm »

Thanks again martno1fan,
looks like water cooled is the way to go then, appreciate all the advice and it will be taken on board (pun intended)

Do you think the ESC needs to be water cooled as well or is that OTT?

Cheers, Dale

martno1fan · « **Reply #8 on:** January 22, 2017, 12:02:32 pm »

I would use a water cooled esc theyre cheap as chips nowadays,you could probably get away with cooling both from one pickup either in one then out into the other or split the water via a plastic y splitter .I use the ones used for aquariums they work great .I use int diam 4 mm silicone hose.

these are the pickups i use .
http://www.ebay.co.uk/itm/2-Pcs-4mm-Inner-Dia-Water-Nipple-for-RC-Boat-Hull-Bottom-Pickup-/361400204852?hash=item5425217e34:m:mkjvQAZ3I1DFccU8NvWcu7w

splitter
http://www.ebay.co.uk/itm/Y-Piece-Hose-Mender-Connector-Pipe-Joiner-Aquarium-Air-Fuel-Fitting-Fish-Tank-/262568193168?var=&hash=item3d2248ac90:m:m6FovPQR7CNlBoibuAwFEiA

canabus · « **Reply #9 on:** January 23, 2017, 06:53:14 am »

Hi Daleb

The 3660-1700kv motor is to powerful for that size boat!!!!

I have started a SG&K but it's 850mm, motor 3639-1100kv, 60 Amp ESC, 3S 3700mah Lipo and a 3 blade 37mm prop.

I am running the same setup in a 850mm Sea Commander cabin cruise but with a 2 blade 40mm prop.

Very good turn of speed about 35 kph.

Daleb · « **Reply #10 on:** January 23, 2017, 10:14:43 am »

Hi canabus,

thanks for your reply and I'll take a look at the set up you've suggested

Dale

martno1fan · « **Reply #11 on:** January 23, 2017, 10:52:57 am »

Quote from: canabus on January 23, 2017, 06:53:14 am

Hi Daleb

The 3660-1700kv motor is to powerful for that size boat!!!!

I have started a SG&K but it's 850mm, motor 3639-1100kv, 60 Amp ESC, 3S 3700mah Lipo and a 3 blade 37mm prop.

I am running the same setup in a 850mm Sea Commander cabin cruise but with a 2 blade 40mm prop.

Very good turn of speed about 35 kph.

The motor isnt too powerful if he runs it on 3 s

,reason i suggested it is it can swing a decent sized prop with ease and its on at an unbelievable price. To me its a good choice i just bought one for a similar project i have in mind in the summer .this ones £31 completely water cooled to me its a bargain and yes is powerful on 6s but on 3 s its gonna be more than fine. I dont like small outrunner motors in small confined spaces personally . Anyway ill leave it to you as you always seem to be the expert so count me out im done .

Daleb · « **Reply #12 on:** March 18, 2017, 08:33:58 pm »

Well, as a relative newby to RC boats, this post didn't start too well, I was just looking for some advice hey ho...I was going to do a build log as I could do with help and guidance from you experienced guys but I'm not sure now.... I would of course expect and welcome criticism and maybe some well needed encouragement..... admin, should I start a new post or continue here?

Looks good keep them pictures coming.

ken

The box...

Phase one useng the included depron jig

Daleb · « **Reply #13 on:** March 18, 2017, 09:50:12 pm »

Stringers added

Daleb · « **Reply #14 on:** March 18, 2017, 10:20:05 pm »

Transom glued

Hull going on and weighted down to stop distortion from build jig as per instructions

Daleb · « **Reply #15 on:** March 18, 2017, 10:23:38 pm »

Worked out ok

Daleb · « **Reply #16 on:** March 19, 2017, 12:25:01 am »

Mahogany fitted to frames but protected with masking tape to avoid possible damage...

martno1fan · « **Reply #17 on:** March 20, 2017, 06:20:39 am »

You were given advice what you do with it is your decision .

Daleb · « **Reply #18 on:** March 20, 2017, 09:05:46 am »

Hi martno1fan,

I think you may have misunderstood my last post, I was trying to say that it was a shame that you and canabus seemed to fall out over it and I'm sorry for that and it put me off continuing with a build log.
I thank you again for all your help and advice which I'm very grateful for. I have purchased that motor and appropriate ESC plus all items for water cooling.

I have decided to test run a couple of set ups in another s/h boat I've bought first as the Jenny will not be easy to swap about once installed.

Thanks Dale.

Daleb · « **Reply #19 on:** March 20, 2017, 09:37:36 am »

The right way up at last...

Daleb · « **Reply #20 on:** March 20, 2017, 09:41:19 am »

martno1fan · « **Reply #21 on:** March 20, 2017, 12:02:30 pm »

No ones fallen out least not me,we can agree to disagree its all good .Not saying anyones wrong but always more than one way to do things. Don't be put off and if anything i said did that then i apologise to you and Canabus . Sometimes what we say comes across wrong on the page thats my excuse and im sticking to it lol .
Good luck with it,one things for sure that motor will be working well within itself on 3 s,should be a good running boat once done. Looks good so far

Daleb · « **Reply #22 on:** March 20, 2017, 03:42:39 pm »

Daleb · « **Reply #23 on:** March 20, 2017, 08:54:39 pm »

Build board tabs cleaned off and mahogany Transom fitted

Daleb · « **Reply #24 on:** March 20, 2017, 10:07:18 pm »

Started on the cockpit mahogany, a couple of coats of Z-poxy finishing resin slightly diluted with !sopropanol and then several coats of Ronseal yacht varnish with a light rubbing down between coats and letting cure for 3/4 days in between...gonna be a long process...

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Author Topic: Aero Naut Jenny (Read 13602 times)