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Author Topic: Motor for Aeronaut Jonny  (Read 385 times)

ahammond

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Motor for Aeronaut Jonny
« on: September 14, 2020, 02:10:54 PM »

I am about to start a build of the Aeronaut Jonny. The recomended motors in the instructions are a pair of  Aeronaut race 720 navy. However these are three times the price of Mtronik 600s. Question is are they worth the money or will the Mtroniks be just as good or ar least good enough. The model is 99cm long and weighs 14kg from the instructions
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Tug Fanatic

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Re: Motor comparison
« Reply #1 on: September 14, 2020, 02:34:55 PM »

They are wildly different motors.

The Aeronaut Race 720 Navy is a high torque low rev motor that produces its power at max 5000rpm on 12v (416kv)
https://www.cornwallmodelboats.co.uk/acatalog/Aeronaut-720-Navy-Motor-12-V-AN7000_49.html

The MTronics M600 is a high revving motor that on 12v turns at around 18000rpm (1500kv).https://www.cornwallmodelboats.co.uk/acatalog/Mtroniks-M600-Marine-Motor-M600.html

The mTronics might work (sort of) with a much smaller propeller but it isn't a choice that I would make. Others might disagree.

These are much more similar to the Aeronaut:
https://www.componentshop.co.uk/775-dc-motor.html
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ahammond

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Re: Motor for Aeronaut Jonny
« Reply #2 on: September 14, 2020, 02:55:47 PM »

Thanks for that I had been looking at the Cornwall models site and also the Bauer Modelle site in Germany.  Cornwall models are slightly cheaper as the postage from Germany works out quite expensive for small items because Bauer insist on using couriers for everything. 
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DaveM

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Re: Motor for Aeronaut Jonny
« Reply #3 on: September 14, 2020, 03:31:52 PM »

One Golden Rule applies when chosing motors - use the ones recommended wherever possible. The manufacturer has built at least one more example of this model than you have so don't waste time, money and effort jumping around the Internet looking for an alternative simply to try and trim a few quid off what is essentially one of the least expensive but most important bits of hardware. This is a four hundred and forty quid kit - that price merits the correct equipment. At least you had the sense to ask before you made an unwise purchase.
The 5000RPM Component Shop 775 would also be suitable as it has the same technical specifications, but I see they are currently out of stock.
Dave M
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Tug Fanatic

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Re: Motor for Aeronaut Jonny
« Reply #4 on: September 14, 2020, 06:10:29 PM »


............................The 5000RPM Component Shop 775 would also be suitable as it has the same technical specifications, but I see they are currently out of stock.
Dave M

The Component Shop website says that they are in stock. It is the mounting bracket that isn't.

I hear what you are saying about using the recommended motor but then I object to being charged three times the price because they have stuck a label on it.
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Taranis

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Re: Motor for Aeronaut Jonny
« Reply #5 on: September 14, 2020, 06:44:19 PM »

I will always look at brushless these days even if I'm the guinea pig. Having advice from those gone before is great and I agree with Dave's sentiments completely, otherwise you have to break new ground.

DaveM

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Re: Motor for Aeronaut Jonny
« Reply #6 on: September 14, 2020, 11:35:52 PM »

The Component Shop website says that they are in stock. It is the mounting bracket that isn't.

I hear what you are saying about using the recommended motor but then I object to being charged three times the price because they have stuck a label on it.
The nice thing about receiving free advice on a forum is that you're not obliged to take it. You are correct about the indicated stock level at Component Shop. Go ahead and do what you feel is best, but either way don't fit MTroniks 600 motors or you will regret it.

DM
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ahammond

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Re: Motor for Aeronaut Jonny
« Reply #7 on: September 15, 2020, 06:16:00 AM »

Thanks for the replies. In the past I have just chucked in whatever motor seemed right or was suggested by the kit manufacturer without bothering too much about details. I have checked out the Component shop and their motor is less than half the price of the Navy 720.  There are mountings supplied with the kit that should fit without any problems. The only slight reservation that I have is that I have vague memories of buying a Component shop motor many years ago and having difficulty getting the suppression kit soldered on to it. The casing for some reason did not want to accept the solder.  Right, now on to the next of many items on my list that I will be sourcing for this kit.  Anybody know where I can get 1/32 figures to suit? My ususal sources via Ebay etc are so far proving negative without a lot of kit bashing being needed.
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DaveM

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Re: Motor for Aeronaut Jonny
« Reply #8 on: September 15, 2020, 09:41:48 AM »

If you're using 2G4 radio then you shouldn't need any suppressor caps at all, although it's always good practice to solder one x 0.1uF disc ceramic directly across the motor terminals to reduce any RF interference for other users on the pond. Do please note that Component Shop source their motors from several manufacturers who, in turn, will have different specifications for the materials used. Unlike brushless motors (which always seem to have excellent labelling and don't need RFI suppressors), buying brushed ones is like Forrest Gump's box of chocolates - "ya never know what yer gonna get..."
DM

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RST

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Re: Motor for Aeronaut Jonny
« Reply #9 on: September 16, 2020, 12:33:41 AM »

Have to say. If you're not confident yourself I can understand why  folk just say stick with the standard specification.  I wouldn't hesitate to change myself as I am more experienced.


...but I notice also the list price of the motors from your manufacturer seems pretty steep. Did you check UK suppliers for exactly the same motor? A 10s Google check came in about 10 quid cheaper via a UK website and I ALWAYS advocate buying in country first.  I was surprised but not so surprised as Dumas seem to massively over-hype their running gear prices also from what I can see.
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RST

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Re: Motor for Aeronaut Jonny
« Reply #10 on: September 16, 2020, 12:37:46 AM »

...by the way to Dave M, the last time I heard that analogy applied to motors was with Model Motors Direct. I've ordered from component shop ever since, but hearing that now I'll think more about motor orders from component shop later also.
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ahammond

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Re: Motor for Aeronaut Jonny
« Reply #11 on: September 16, 2020, 06:17:14 AM »

It is not a matter of confidence but a lack of interest in the technical side of electrics. I much prefer electrics to be plug and play.  I have other hobbies that need a degree of specialist knowhow and I just cannot work up the entusiasm for the minutae of electrics. For instance I also run a fair size tropical marine fish tank that requires a knowledge of the chemical make up of the water and a host of other things before even getting started on fish and corals.
  I am afraid that whilst I prefer to buy from the UK my experience in the past has shown that continental retailers are often not only cheaper but also more reliable in some cases than UK retailers. Once again this applies across the board. As a for instance going back to my fish I often use a Germany based firm that will ship live fish from their premises in France via Germany to England to arrive next day. They are cheaper than most UK firms and have a much larger selection. So what am I supposed to do. Put up with UK service simply because it is UK or buy from abroad?
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malcolmfrary

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Re: Motor for Aeronaut Jonny
« Reply #12 on: September 16, 2020, 08:48:04 AM »

My first radio control was a Maplins own brand 27meg AM outfit.  Such things were very prone to interference.  Even back then, the only supression that was needed was a single capacitor across the motor terminals.  That includes even the extremely elderly Kako motor that was in my first radio'd boat.  Soldering to something big and heavy needs a big, heavy, hot iron that will place some tinning on the chosen spot quickly, before the rest of the case tries to heat up.  That, and making good and sure that there is no protective plating on the spot where soldering should happen.


Scale figures?  1:32 used to be a slot racing scale, but 1:35 is near enough for figures and much more available and probably easier to fit in the spaces available.




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"With the right tool, you can break anything" - Garfield

ahammond

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Re: Motor for Aeronaut Jonny
« Reply #13 on: September 16, 2020, 09:10:56 AM »

I did look at the slot car racing figures. But the impression I get is that they are now more of a collectors item. Especially the early Scalextric ones. I will though have a look at 1/35 scale thanks for the tip.
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Aerodecked

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Re: Motor for Aeronaut Jonny
« Reply #14 on: September 16, 2020, 11:28:22 AM »

You could try Hannants for 1/32 scale figures: https://www.hannants.co.uk/catalogue?scale_id=953&search_direction=asc (just choose resin or injection from the left side list)


Zombie pirates anyone?  :D
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ahammond

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Re: Motor for Aeronaut Jonny
« Reply #15 on: September 16, 2020, 01:03:42 PM »

i did have a lookk at Hannants. Loads of figures mainly military but none that looked easily adaptable to suit a modern tug boat.
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ahammond

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Re: Motor for Aeronaut Jonny
« Reply #17 on: September 17, 2020, 06:34:21 AM »

Thanks for that it was just what I was looking for.
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