Martin baker B57D Build

[Alan_Perse]

Hi Ron,

You also have Tracfoil (that's what I use), but I usually use those software to export the dat in the CAD program.

Hi Fred.
With Profili Pro 2 you can export everything to a dxf. file so you can use it in a CAD program.

By the way John sorry for hijacking your build log.

[Fred]

I know, I also have Profili, but for a design point of view, the features they offer are quiet limited if you want to do something that is not planned by the software, but for a quick rib print for a straight build, they work great!  

[Alan_Perse]

hmmm :?: Must have a look at Tracfoil then :?: :?:

[Fred]

Well, no, I meant Tracfoil and Profili (and the like) by that.

[Alan_Perse]

Oh I understand now. I think Compufoil can do much more.

[Ron]

Yes sorry John for the hijack :oops:

Looks like Compufoil can do more, but also looks like you need to buy the aerofoils or something on a memory stick. :?

[JohnPearson]

Hi Ron, yes it's easy to get side tracked on this forum.

Well I have managed to get things moving again ( weekend panic with the family!), I have started sheeting the fuselage and hope to have this completed by the end of the week. The plans state that this sheeting should be done with lite ply, however with the poor supply of balsa and ply up here in the North from model shops, and the increase in postage costs from across the water, I have used lite balsa, which will be glassed later for strength.



Progress so far, start of sheeting on fuselage.

I will update later this week,

  JohnP

[JohnPearson]

Well, another bit of building done tonight.



johnp

[Happy Days]

Very good john, coming along nicely I think describes this build. :clap:

I'd just like to go back to something you said a few days ago.....(I'm still trying to figure out what defines a HOT motor :? )

HET Typhoon 2W-20 3300Kv (700W) Brushless Inrunner Motor, would be a hot motor on a 4 cell lipo

I've had no experience with inrunners.(I've a fair bit with outrunners though)
 Looking at the tech. spec. of the above I see this motor has "2 wind" :shock:
What is a 2 wind motor?
And what does "2W-20" mean?

Yes, I know this is all boring stuff for you, :roll:  but Uncle Keithy needs to know these things :!:

K.

[Ron]

Yes, I'd be very interested too.
I'm not up with the latest jargon on all this motor stuff  :oops:

Ron

[Richard Boyd]

Keith, nearly every motor producer has mixed up ways of telling us data through the numbers they us for their motors !
  The Het motor is a 2 turn !
What the 20 stands for !!!!  number of wires per wind ¬! number of stators, number of how many times the little chineese man cut his knuckles whilst winding the motor ! it could be many a thing but not important.
Aiden might have the answer .
What you need to know is the Watt output, on the desired battery and prop/fan unit.
I am not a lover of Thypoon motors,
I am a mega motor fan lol.

Screaming motors should be banned !

Richard

[Happy Days]

Keith, nearly every motor producer has mixed up ways of telling us data through the numbers they us for their motors !
  The Het motor is a 2 turn !
What the 20 stands for !!!!  number of wires per wind ¬! number of stators, number of how many times the little chineese man cut his knuckles whilst winding the motor ! it could be many a thing but not important.
Richard

Yes I know all producers use different publish data about thier motors. Infuriating isn’t it! :!:

But look, ….I’m just a humble, simple minded Englishman. You have to be gentle with me.

2 turn??? Are you saying that each coil / winding would only have 2 turns?

Just need to get this right in my head.

Yours, desperately seeking answers,

Keith

[Happy Days]

Just watched that vid. He flys very nose up doesn’t he…….is that what they call a “Head Up Display” :lol:  :lol:

[Happy Days]

DOH! I've put my last post in the wrong thread.......... :!:

[Richard Boyd]

Keith, nearly every motor producer has mixed up ways of telling us data through the numbers they us for their motors !
  The Het motor is a 2 turn !
What the 20 stands for !!!!  number of wires per wind ¬! number of stators, number of how many times the little chineese man cut his knuckles whilst winding the motor ! it could be many a thing but not important.
Richard

Yes I know all producers use different publish data about thier motors. Infuriating isn’t it! :!:

But look, ….I’m just a humble, simple minded Englishman. You have to be gentle with me.

2 turn??? Are you saying that each coil / winding would only have 2 turns?

Just need to get this right in my head.

Yours, desperately seeking answers,

Keith

Hi Keith, yes it is actual 2 turns per stator !
Each turn of wire is made up off several sub wires !
Maybe this is were the 20 comes from ! :clap: