[TowerTalk] NEC rotate wire

[jimlux]

On 7/9/19 9:58 AM, David Gilbert wrote:
> 
> Yes, but what he apparently wants to do is set the wire length while 
> horizontal and then rotate the wire to the desired angle, which avoids a 
> manual calculation of the new end point.
> 
> EZNEC+ has that capability built in to its NEC interface, but apparently 
> Felipe is using a different NEC application.

In 4nec2, you can do a
SY L = 10		' length
SY ANG = 0		' direction

GW {stuff} L*COS(ANG), L*SIN(ANG),H,Radius


But if  you're running bare NEC then GM cards are how you'd do it.

I either use 4nec2, or python that builds a NEC deck. More of the latter 
recently.

If you want to know about dielectric losses, effective height, and 
feedpoint Z for short dipoles on the lunar surface, let me know.

Or the pattern when a thin wire antenna is bent by the spacecraft 
rotatational acceleration - use the python to calculate the shape of the 
wire, generate a stack of GW cards, run the model. Who cares if the NEC 
deck is several hundred lines long.

(I think that in some cases, one might be able to use the catenary card 
from NEC4 for this)




> 
> 73,
> Dave   AB7E
> 
> 
> On 7/9/2019 9:23 AM, Wes Attaway (N5WA) wrote:
>> It seems like you could just give the far end a new coordinate in the
>> desired direction and leave the other end connected to the vertical wire
>> end.
>>
>>     -------------------
>> Wes Attaway (N5WA)
>> (318) 393-3289 - Shreveport, LA
>> Computer/Cellphone Forensics
>> AttawayForensics.com
>>     -------------------
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of 
>> PY1NB
>> - Felipe Ceglia
>> Sent: Tuesday, July 09, 2019 10:29 AM
>> To: Tower and HF antenna construction topics.
>> Subject: [TowerTalk] NEC rotate wire
>>
>> Hello,
>>
>> When modeling an inverted L (tag 1 is the vertical part, tag 2 is the
>> horizontal), is there a quick way or trick to rotate the horizontal wire
>> (tag 2) and keep it connected to the vertical wire (tag 1)?
>>
>> When I try to rotate it using the move/copy (GM) it gets away from the
>> vertical wire.
>>
>> Thanks,
>>
>> Felipe CT7ANO, PY1NB
> 
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