SEN 1483
- Details
- Category: Archive 2010
- Hits: 2011
- M&K Flappers for sale
- AMA/EAA Contest for young eagles in the USA
- Fried servos on FB
- SEN 1482 etc
M&K Flappers for Sale
M&K Flappers for Sale
(NOTE: I (Rene) am submitting this message by request of my friend Roland Koglot)
For sale is 1 original M&K Flapper (Long or Extra Long, customer choice). Model is in very good and complete factory condition. Asking price 3000 Euros OBO. Model can be delivered to Max Men in Lost Hills or other contests by request.
Interested parties please contact Roland Koglot at This email address is being protected from spambots. You need JavaScript enabled to view it. or Rene Limberger This email address is being protected from spambots. You need JavaScript enabled to view it.
For younger flyers in the USA - See the AMA/EAA Young Eagles Contest
Bram Van de Kerkhof
Maybe you should make a freeflight special servo. Allard already made a digital interface. Think Rene could help here.
Alexandre Cruz
Ever tried the JR DS285MG? It is really precise and strong at 12-13g I recall
Javier Abad
Pele,all servos burned were driving the flaps?I have used HS55 & HS65 no problems so far,at 6v.
Roger Morrell
Javier maybe Pele launches harder than you? Or maybe the mechanical design of your airplane is better? The servo designer probably wonders why the freeflight guys abuse his servos. The servo sales guy doesn't care :-). I have noticed that... the HS 65 can get into a funny state where it draws over an amp. This is more likely if you are driving out side the normal operating range. This could happen if you are right at one end of the range of movement. You may just need a bigger servo. Their digital equivalent may have more power even if it is harder on the battery. Typically digital servos are more sensitive to getting good data from the timer.
Javier Abad
Roger, I keep my wings at constant camber = BE models ;-)
Per Findahl
It doesn't matter where I put the servos. I even burnt about 10 rudde r servos=no force at all ! It must be some virus ! Oskar is the same, he burnt 10 times more servos in his RC helicopters and planes then our whole club together ! Perhaps we just fly too much !
Per Findahl
But now there is a new HS 65 in the new flap-fuselage again. Hope it will last some more flights......
Allard van Wallene
I never burnt a servo. Very strange......
Roger Morrell
Maybe it is to do with the voltage, most servos will take 6 volts But not all more than that. That is probably why you do not burn out the servos Allard because of your power supply system. Hitek will not take an unregulated 2 cell Lipo. Dymond's competition servos will take 9 volts, that why the D47 is great when a reliable small servo is needed - F1B or F1A rudder. When moving from NiMH to LiPo, it is not just the voltage , the LiPO will deliver a lot more current, so in the past with a NiMH the internal resistance of the battery protected the servo against too much current. This is not the case with a LiPo.
Rene Limberger
Per, this is with M&K timer? they deliver boosted 6V to the flap servo, right?
Per Findahl
Yes, the 6 volts is part of the problem, for sure. I wanted M&K to go for 5 volts to all servos, but in the end they decided 6 volts. It is a bit high, and of course the servos suffer.....
Roger Morrell
Have you checked if it is really 6 volts, not more?
Per Findahl
No, I didn't check, I just trusted the factory !
Roger Morrell
The servos do not last forever but the ones you are using are not too bad and even with the amount you fly it seems like a high failure rate. While I can't comment on how M&K's electronics works and if you exclude obvious abuse such as co...nnecting the servos the wrong way around I would check 3 things. (1) Wear, including frayed wires and connectors, R/C connectors can last less than 100 connect/disconnect cycles. (2) Mechanically binding surfaces or using brute servo force to move a surface instead of good mechanical design. (3) Too high a servo voltage or out of spec pulses from the timer. I would think the latter is not likely as M&K would have checked that and the Hitek servos are more sensitive than some other makes and won't work if the pulses are too far out. It is possible that the passive components in the step up circuit have drifted causing a too high a voltage. All of this is probably obvious to a flyer at your level but judging by your comments you do seem to have a higher than average failure rate.
SEN 1482 and other SEN stuff
This issue was bounced by Timer-Warner/RR/Adelphia etc, we did work with our provider to try and find out what was upsetting TW/RR and have made some different adjustments. We did resend it but in case you did not get it , it can be found online for subscribers who use this ISP.
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Roger Morrell