In a message dated 2/21/2006 12:38:53 A.M. Eastern Standard Time,
[EMAIL PROTECTED] writes:
In a message dated 2/21/2006 12:15:36 A.M. Eastern Standard Time,
[EMAIL PROTECTED] writes:
Any RF
savants out there that can explain in scientific terms why a synthesized
TX RF
Hi All:
Any help locating OFB ROGER TAYLOR will certainly be appreciated ...
Roger was US Navy and retired in San Diego and worked for Union
Carbide ... heleft and moved to Las Vegas (Henderson) to do some contract
testing work on military aircraft ... came back to San Diego and moved to
The Hitec Spectra has probably had the
longest run/best chance for positive evolution. Now JR, Fut Mpx have
similar units, but relatively little consumer field experience.
Huh? Futaba came out with a synthesized module for the 9Z series of
radios long before Hitec had the Spectra
The Hitec Spectra has probably had the
longest run/best chance for positive evolution. Now JR, Fut Mpx have
similar units, but relatively little consumer field experience.
Huh? Futaba came out with a synthesized module for the 9Z series of
radios long before Hitec had the Spectra
No disrespect to the futaba module, but the hitec spectra module existed
long before
the 9Z radio hit the market. I used the hitec module on my futaba 8uaf over
10 years
ago and on my hitec radio almost 20 years ago. I think futaba is relatively
new player
in the freq. module game by
3 M fox slope ship RTF rec, bat, servos,
ect.
$355 delivered CONUS
Tom
TG32 Mount View DrAfton, VA
22920
540 943-3356
I think futaba is relatively new player in the freq. module game by
comparison.
Mark Mech
www.aerofoam.com
Sorry Mark,
I have a moduled Futaba Radio before Hitec-RCD (the company)even existed.
Brian
--
--
* Brian Chan,
*
I just exchanged emails with Steve Helms who is the head Futaba guy
(Futaba Corporation, not Hobbico) in the US and who has been in the RC
industry wince WAY back (all the way to Pro-Line back in the 70's). He
reminded me that in fact it was KRAFT who had the first synthesized
module back in
Sorry guys, neither Hitec or Futaba was the first. Kraft had the earliest version that I know of, in the 1979-1980 time frame. It was affectionatley termed "dial-a-crash" after the notion that a forgetful or malicious person could dial in a frequency that caused another to crash. This was in
Bill's Email wrote:
industry wince WAY back (all the way to Pro-Line back in the 70's).
He may WINCE when he remembers how long it has been SINCE he got into
the industry!!.
I paid $330 for a 50channel radio in 1971.
After booth review it appears that this was only a FIVE channel
[EMAIL PROTECTED] wrote:
There
used to be a bunch: Orbit, Kraft, Milcott, Ace, Heathkit, etc. Kraft as
long since gone the way of the other RC pioneering companies.
Don't forget Pro-Line. We built the first radio with dual rates back in
the mid-70's!!!
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Also don't forget EK which I understood to have the first proportional
system with their Logictrol unit, late 70's I think. That must be
erroneous though since, according to Bill, Pro-Line already had dual rate in
the mid-70's.
Historians please comment.
- Original Message -
From:
Forgot EK. I had a red brick
I'm not sure when they got dual rates, but they may well have had the
first true proportional radio, although it had to be before the
early70's. I started flying RC in 1969 with a Cannon radio that was
fully proportional. Kraft was already an established
Where is my brain?
That will teach me to start typing before I wake up
For some reason I was thinking about the recent 9c radios (I own 2)
instead of the Z. I had the first hitec radio with the spectra module and
specifically looked for synthesized modules (early 90's?) when I bought my
first
At 09:43 AM 2/21/2006, you wrote:
Sorry guys, neither Hitec or Futaba was the first. Kraft had the
earliest version that I know of, in the 1979-1980 time frame. It
was affectionatley termed dial-a-crash after the notion that a
forgetful or malicious person could dial in a frequency that
Here's a good thread with some great history and photos:
http://www.rcuniverse.com/forum/m_3678063/tm.htm
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OK, good information.
Taking Mark's estimated servo moments and converting to back to kgf-cm and
going to http://www.teaser.fr/~osegouin/aeromode/servos.phtml or more easily
(since I don't read French)
http://www.rcgroups.com/forums/showpost.php?p=5010862postcount=43 and
getting the amp draw for
In fact, I still have a Dial-A-Crash, that has all 20khz spacing 72mhz
channels, acquired around 1982-83. It has been recently tuned and is
1991 narrow band legal on all but channel 39. Coupled with a Kraft
KP-7C MkIV tx, can make a nice tug radio.
Tom Kallevang
Wheeling, IL
LSF President
Since we are into reminiscing about the good old days, I witnessed
more radio control development than most currently active
modelers. I got my first radio in 1953, It was a Berkley Aertrol
that I paid $49 for and received a bag of resistors, condensers,
tubes, and wire along with an
Prolines were build in Athens, Alabama and was built from precision lab
quality electronics and Ron Chidgney's stick assembly. The control
sticks from the Proline Competition transmitters still have not been
equaled.
I worked for Pro-Line after they moved to Phoenix and just after Jim
I really hate to interrupt the discussion on who was the first to invent the
radio (my vote goes to Nikola Tesla) but I have a question for the Supra
owners out there.
Would anybody care to hazard a guess as to what the combined weight of their
battery and ballast is? If you are flying
Mark I enjoy reading your posts, very interesting. Makes me think of Spock. :-)
What about elevator loads? And elevator servo moment? How would
that be calculated?
At 10:08 AM 2/18/2006, Mark Drela wrote:
Molded Supra launch hinge moments are listed below,
for a 200 lb tow load (hard
Just a reminder that nats entries are open and already close to fifty are in
the books from 15 states. Appreciate all the entries that have come in, all
the info is on www.silentflight.org under the 2006 Nats heading. Barry
Anderson will gladly take your entrie.
Looking forward to the
Fully molded electric version of the
Eraser Extreme. NIB fuse and elevator. Some
very minor work done on the wings. Everything is included. All control horns
have been factory installed. The workmanship is outstanding.
More information can be found at the following site:
This is without a doubt, one of the most refreshing strings we have had in a
lng time.
I flew Min-X reeds, badly, with Bonner compound escapement for rudder/elevator
and a Royal escapement, I think, on throttle in a Bill Winter designed Kracker
Jack around 1961 or 1962 and have remained
This is indeed a very interesting post by Mark Drela on servo requirements.
Did anyone else notice that the calculated flap servo torque requirement (62
in-oz) is higher than the specs on all commonly used servos other than the
Volz Micro Maxx HP. The JR DS368 is spec'ed at 53 oz-in. The thin
With my travels it didn't take long to figure out that I was going to be
sitting out while some other pilot sat on a freq all day long, especially on
slopes.
So I bought up all 50 Xtals and carried them along...but the next
realization was that I was over working the sockets...they were
This really gets one thinking about the flap servos
and what one is/has
used
for flaps.
99.9% of you guys will never build the line tension
Mark is referring to.
But...this brings to light a thread from awhile back
regarding servos and being smart about your linkage
geometry... design your
...The other factor involved IS the dial a crash potential. ALL of the
current synth modules use the tiny dials, with tiny digits...Not the Evo. interface via the LCD screen. You have to power off to change.DJA
Nor the 14MZ. Totally wireless connection. No dials, no nothing. All
electronic.
Dan Ahearn wrote:
...The other factor involved IS the dial a crash potential. ALL of the
current synth modules use the tiny dials, with tiny digits...
Not the Evo. interface via the LCD screen. You have to
Seems folks are overdure for a reality-check on the care and feeding of
their servos;
Specifications derived to advertise servo torque specifications utilize
a benchtop fixed voltage power supply which will supply current in
excess of the unit under test (UUT). Every test I have seen utilize
Hi Don,
I have been watching this one waiting for this endingbecause it
is totally out of context of what is 'needed' for our contest planes. What is
needed is 10mins exactly and 100 landing points in every round.
Every plane prior to today's ships have been 10 to 20ozs heavier,
with
Excellent post Simon!
Thanks for all that detail!
Gordy
In a message dated 2/21/2006 10:44:21 P.M. Eastern Standard Time,
[EMAIL PROTECTED] writes:
99.9% of you guys will never build the line tension
Mark is referring to.
AMEN! Good Lift!
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In a message dated 2/21/2006 10:54:40 P.M. Eastern Standard Time,
[EMAIL PROTECTED] writes:
The other factor involved IS the dial a crash potential. ALL of the
current synth modules use the tiny dials, with tiny digits. It was why I
urged all recently to invest in the Frequency
Those rotary switches on the synth modules are not designed for
continuous use. They're similar to the old circuit board mounted DIP
switches (the ones that you had to flip with the tip of a pencil),
they're great for occasional configuration changes but the contacts and
detents wear out quite
I'm building a Hobby Club Danny 3 m RES sailplane, which is one of the pod
and boom style of fuses, a la the Bubble Dancer, Topaz, Ava, etc, etc. I'm
debating whether to install the rudder/elevator pushrods inside or outside
of the boom. The pushrods I have are .070 carbon fiber from CST. I've
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