SEN 3175
- Lookin for D47 Servo?
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- Ike Winter Classic 2024
Lookin for D47 Servo?
From: Jean Luc Bodin
Hi Roger
Can you tell me which servo to replace thé D70 on your Timer for F1b
Thank you
BR
Jean Luc
Jean Luc
I assume that you mean D47. Here is a reprint of several previous SENs on that
D47 replacement
The Dymond D47 was a very popular and reliable micro servo used in both F1A and F1B models. In F1B models it was typically running on a single LiPo as the main servo releasing levers and F1A for rudder or wing wiggler. Here it probably ran on a higher voltage.
Free Flight Lore has it that prior to 2000 engineers at AeroVironment determined that it would be good for a small UAV provided a small change was made to a passive part in the servo. This was done and made it very good for the the UAV and Free Flight Models and R/C DLGs .
This servo was also sold under other labels, Ripmax etc. This servo was discontinued much to our collective dismay and people have looked for a replacement.
Recently Miha Lemut asked the Free Flight collective on the FB for suggestions. As he suspected there were quite a number of suggestions. We publish an edited list below and give credit to some of the suggesters.
There is one item that was not an issue in before 2000 was the issue of susceptivity of the servo to RF, EF or MF interference. I understand that a number (all?) of the onboard GPS systems manufacturers that we use have found the D47 susceptible to interference and recommend filters. The same GPS guys say that other (more modern) servos are better. While the FB list discussed quality and weight stated vs actual measured none mentioned this
Note the list does include some links to manufacturers and shops, this is not exhaustive and typically there are a number of suppliers. This is a few months old so things and opinions may have changed since then
Mórocz Péter
For rudder Futaba S3114 would be enough
Loet Wakkerman
KST-X06-V6
https://www.hoelleinshop.com/KST-X06-V6-mini-digital-servo.htm?shop=hoellein&SessionId=&a=article&ProdNr=KST-0053&t=182&c=187&p=187
Much better than the Dymond.
Mihály Váradi
The corona ds-843mg servo is 11 gr but some places say it is 8.5
Other Coronas may be better
Bill Kuhl
FOSA EMAX ES9051 4.3g Digital Micro Servo
Very popular and inexpensive. Used by Team Menanno on some very large AMA Gass models. I think they Pot the electronics for these models. Potting Not needed for electric and rubber models.
Michael Zagora
Emax es9051 or Chaservo DS06
https://horejsi.cz/Pages/DetailProdukt.aspx?objcislo=4044
Serg Vorvihvist
KST X06,
Mihály Váradi
https://hobbyshop.si/power-hd-dsm44-digital-servo-16kgcm-6v
Power HD DSM44 Digital Servo 1.6kg/cm 6V
Tony Mathews
http://www.chaservo.com/chaservo_Product_2064706224.html
CHASERVO.COM
LV06 Sub Micro Servos 0.05sec 17N Coreless DC Motor CHASERVO
Chase Servo have a number of different 06 models e.g. LV HV different voltages etc make sure you choose the right one
This is designed as a replacement for the Dymond D47. Very good quality and high accuracy. More expensive but higher quality materials
Bernd Hönig
A new servo series that would fit into the portfolio would be Cha Servos.
The Low Volt has been specially designed for 1S Lipo. Some F3K competition pilots report that it is very fast and accurate.
Bernd Hönig
Murphy, Jack
Roger,
I have used these servos and have been happy with them-
https://www.micromark.com/Power-HD-Featherweight-Micro-Servo-Package-of-2
Best, -j
Jack’s choice is smaller and might not be robust enough for an internal combustion engine powered aircraft. Jack is an electric flyer .
Can Tezcan
Hello,
I was also searching an alternative to Dymond D47 servo, because of all my F1B timers. I end up on a servo called Chaservo LV06, on my opinion much better than D47.
Here in this webpage there are a lot of D47 alternatives with data, comparison and YouTube videos. Maybe it helps one or other.
https://flightpoint.co/best-dlg-servo/
Mit freundlichen Grüßen
H. Can Tezcan
Hobby Club
Our options:
BLUE ARROW SERVOS (several options)
1) https://www.hobbyclub.com/index.php?main_page=product_info&cPath=24_43_190&products_id=1947
2) https://www.hobbyclub.com/index.php?main_page=product_info&cPath=24_43_190&products_id=1948
3) https://www.hobbyclub.com/index.php?main_page=product_info&cPath=24_43_190&products_id=1744
On this last one above, there are 3 different mounting options. Widely used on F3K (HLG) models.
We also do carry KST:
https://www.hobbyclub.com/index.php?main_page=product_info&cPath=24_43_234&products_id=2043
Rgds,
Alberto
………………………
Editor’s Note Alberto is a former F1A flyer and SCAT member based in Southern California and Hobby Club is an online Hobby business running for longer than I can remember.
Transparency
From: chris.edge
Roger,
Given that the proposed automated timing system based on the Neuron will provide a stated flight time, it is not unreasonable to provide the criterion on which the start and end of flight is based such that it is clear to all users/organisers/observers. Can this be done please ?
EoB
EoB
The object of the About Time project is to make the whole process of flying in major events easier and fairer for all flyers. Part of this is to make it easier for the organizers to deliver a quality and fair event. So our objective is to address outstanding issues and things that concern our community, so thanks for giving us your concerns and we will do out best to address them.
Isaacson Winter Classic
AMA and NFFS Events
Lost Hills, California, 10, 11, and 12 February 2024
National Cup Events
In Conjunction with the Kiwi Cup World and America’s Cup Events
The following events can be flown on either Saturday February 10 or Sunday February 11 and can be completed on Sunday
AMA Gas 1/2A
Golden Age ½ A Gas only
E-36 AMA rules
NOS Gas ½ A, ¼ A and Early 1/2A Combined
NOS Gas A
NOS Gas B and C Combined
AMA Gas A
AMA Gas B
AMA Gas C
AMA Gas D and Super D Combined
Classic Glider NFFS Rules
P-30
Mulvihill
Andrade
NOS Electric
A and B electric combined
NOS Rubber Large and Small combined
This year to address the request for some more events and maximum flexibility to those who want to fly in a lot these events can be flown on the either of the first two days or starting on Saturday and finishing on Sunday
Scheduled Events
Saturday February 10
AMA CLG
Gollywock one design 3X3
5X5 HLG Special event @ 2:30 P.M. at the Glider Pen ( See Tim Batiuk for rules)
Sunday February 11
AMA HLG
5X5 CLG Special Event @2:30 at the glider pen ( see Tim Batiuk)
.
Mass launch events @ 8:00 A.M.
E-36
Gollywock (tie breaker for 3X3 event)
P-30
Monday February 11
Vintage FAI Power
Vintage FAI Wakefield ( Bob White Award)
Pro P-30
Vintage FAI Power and Wakefield will be run with 90 minute rounds starting at 8:00 A.M. to accommodate those who want to fly both events. Fly off to commence one hour after regular rounds are complete. Fly off type to be decided by the participants
COVID-19 mitigation requirements will be in effect
.
AMA Events – Event Director Glenn Schneider gtodds@sbcglobal.net
For the FAI events including Kiwi Cup for F1ABCPQ, Mini events F1HGJS and F1E, see a separate flyer. Pre entry is required for the FAI Events.
No pre-entry needed for these AMA and NFFS events. Enter on the field.
Small Print section
Entry Fees $20 for the first event (can be an FAI event) and $5 for subsequent events. $5 for Juniors.
For the mass launch events the exact launch time of each event will be given later*
The E-36 Mass launch will be coordinated with the first round of F1S (which may be delayed if there is a long Kiwi Cup flyoff on Sunday AM )**
HLG and CLG National Cup Points. These events will be flown from the Glider Pen
Strong Arm Glider Challenge. Norm Furutani Trophy This is the overall winner of the aggregate results of the HLG and CLG classes. Points are awarded for the place in the event. This means first will get 1 , second 2 , etc. The winner is person with the least number of points. This award is open to flyers of all age categories. There is an additional prize for the top Youth flyer.. This is for all youth flyers in the same categories , there is a small difference in that half points are awarded for the CLG class, making this class more important as there are more youth flyers in this category. For both awards if there is a tie it will be decided by the sum of all the times. Double times for CLG in the youth category. You may fly in any number of the events, if you do not return a score you will be awarded on more point than the highest number awarded by those who flew. Remember the lowest number overall wins the trophy..
Golden Age: Any post NOS design published, kitted or flown competitively between 1 Jan 1957 and 31 Dec 1969 scaled if needed to 1/2 A size, powered by either Holland Hornet 049-051 or Cox TD 049-051. Construction must replicate the original design, no carbon fiber to be used in construction. NOS flight rules. Gas powered only for this award.
Pro-P30
Combined events will be separated for National Cup points. AMA gas events will be determined AMA vs Classic when registered for National Cup.
Glenn Schneider is running the AMA events.
Tim Batiuk is running the Glider Events
Rest of the story: As most of you know Norm Furutani, one of the founders of this event retired from running it after the 2018 event. This event is very popular along with the FAI events. Glenn Schneider has offered to run the AMA events with a number of volunteers. This is very much appreciated by me and by those who want to take part. We have tried to maintain the spirit of the event. Popular events with the largest participation are the HLG and CLG, Gollywock, E-36, Vintage FAI and Nos Rubber. At the Winter Classic in the past we have promoted special events, typically boosted by some donated $ in the prize money. This year we have the Golden Age ½ A Gas models.
In memory of our dear friends, Bob and LaVera Isaacson
SEN Status
Our new web site is online with archives of SEN going back to 1997 plus many items about FAI Free Flight. It can be found at http://www.faifreeflight.org
Existing SEN subscribers can update their preferences by following the update your preferences link at the bottom of this page.
New users can sign up at this link http://eepurl.com/crOnvj
or at the SEN website
…………..
Roger Morrell