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 61 
 on: Today at 09:34:55 AM 
Started by GG - Last Post by davidjt

hi,
I still use my 27mhz and 40 MHz am and fm  :-)) . I have also started on the 2.4 which I had 3 left me by a friend  who died , but must admit I like not having to check who is on what band. this using 35 MHz sounds good, as I have also got some of these, can I just put say hitec  40 mhz crystal  in transmitter and same in  40mhz receiver and it will work ? , 




david

 62 
 on: Today at 08:50:50 AM 
Started by roycv - Last Post by roycv
Hi all I was intrigued to read that birds have an extra colour cone in their eyes which enables them to see 'colours' in the infra-red spectrum.  As we mix colours with the receptor cones we have an extra cone must be very interesting. 
I suppose we shall never be able to perceive what those colours might be, our vision being at the yellow end.  I wonder what their ancestors the dinosaurs could see?

 However it also seems that we humans are one up on the animal kingdom inasmuch we can see the red spectrum, which they in general cannot.

One of our ancestor apes developed sight in the red spectrum which enabled judging if fruit was ripe or not, a distinct advantage. 

Which comes down to the materials that we have to make colours, we have so many colours tints and shades.  I wonder if we make some colours we are not fully aware of?  I saw a TV prog. some time ago where viewers were asked if they could see colours between red and green and also yellow and blue.  Not the paint or light mix but perceived colours.  Perhaps there are a few humans that have this advantage but are unaware of it?

As I get older I find it more difficult to judge some blues and green but mainly on a laptop screen, I inadvertantly bought some shoes on line the wrong colour a year or so back!  A mix up for me of dark brown and dark blue.  When painting model boats I have quite a good perception of colour fortunately!

So are the birds lucky seeing more colours than we do?  Studies of mating choices in same species birds suggested other unknown colours may play an influence. 
It may well be a survival factor or we may carry markers that are so obvious to birds, perhaps like the heat sensitive cameras used to great effect looking for nair do wells in Police chases.

Meanwhile the Naval guys must have a terrible battle with all those shades of grey, just like life really!
Regards

Roy


 63 
 on: Today at 08:50:18 AM 
Started by tonyH - Last Post by tonyH
Will do Akira :-)) and thanks.

 64 
 on: Today at 08:15:53 AM 
Started by Richard Houston - Last Post by DaveM
The motors, speed controllers and battery packs should all be pre-wired. My advice would be not to modify that wiring in any way, both for the sake of safety and warranty. As Chas says, the prop size will affect the current drawn.
DaveM

 65 
 on: Today at 07:55:54 AM 
Started by Captain Flack - Last Post by Captain Flack
It is the master unit that i have so am going to give it a whirl now I know the voltage etc.Thanks for the replies.

 66 
 on: Today at 07:19:52 AM 
Started by Andy M - Last Post by Footski
A different set of miniatures to be sure. I like them..

 67 
 on: Today at 06:36:30 AM 
Started by ollychap85 - Last Post by canabus
Hi All
The HPI rock crawler motor have them built in.
Canabus

 68 
 on: Today at 06:28:30 AM 
Started by Bernhard - Last Post by carlfmiller
Here's a  teaser clip of Cecilia scooting on her maiden water trial steamed at 25psi on Microcosm M29.  A few scale details to add, and bottom to be painted, but here is the proof that the LWL is Ok and the boat moves out!  Fwd/reverse/speed control all perfect. Ran 15 minutes and stopped, still had fuel and water.Thank you Jin for the steam plant! And Tippecanoe Boats for help on the boat.


All up wet weight is about 11 lbs.



https://youtu.be/BsD9RT427rA


Carl
















 69 
 on: Today at 03:27:57 AM 
Started by Martin [Admin] - Last Post by Martin [Admin]
This topic has been moved to The "Black Arts!" ( Electrics & Electronics ).

https://www.modelboatmayhem.co.uk/forum/index.php?topic=63388.0

 70 
 on: Today at 03:27:37 AM 
Started by Andy M - Last Post by Martin [Admin]

  Excellent!   :-))


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