Frank Skilbeck

 A motor Kv rating is no load rpm per volts, so if you increase the battery from a 3s to a 4s the motor will try to turn 1.33 times faster, as power (on the same prop) is roughly proportional to the square of the speed the power absorbed would by 1.33 x 1.33 roughly 1.75x the power, so you would see the amps go up accordingly. Hence the need for a smaller prop to keep the amps within the rating of the motor and ESC.  Remember its too many amps that destroy motors and ESC's not volts, but too may volts without changing the prop gives too many amps and releases the magic smoke.  Alos if you are using the ESC BEC to power the Rx and servos you need to make sure it is OK at the higher voltage.

I'm not familar with the 14 MZ but some of the top of the range Tx's do have features that some pilots would use. I.e. ability to set up several servos on one switch so they go through a sequence, e.g. for retracts with separate doors which open and close when the wheels are lowered. You could do the same with an onboard seqencer but that adds weight, complexity and has a cost of its own.   But some have them just for bling, I've seen high end radios with planes with Y leads because the owner found it too complicated to program in separate servos

Not familiar with the Dx7 but I dio have an E Flite Beaver, lovely plane, but you will need to mix in down elevator with flap and also aileron differential does help, as does using rudder in the turns (I have mine mixed with the ailerons)   You don't need a reversing Y lead for the flaps as E Flite have set up the servo mounts to use a simple Y lead.   You could Y lead the ailerons together and obtain diffential by moving the servo arm round so it isn't at 90 Deg at neutral, if you rotate it so it is towards the leading edge then you will get more up aileron than down. Its how we used to do it before programable radios.   This will let you use the flap/elevator coimpensation menu.

Wildthing, fly it, bash it, fly it.

It could also that you'd reversed the throttle after binding in which case you'd need to rebind to set the failsafe correctly. You should also check the failsafe as well when the model is in a secure location

Eagletree are doing a standalone telemtry system though  not sure it its a good idea to have an independent 2.4 transmitter in the plane though.   Also it would probably be less expensive to but a Multiplex Cockpit Sx Tx and Rx plus sensors you require, or wait until the DX8 arrives.Edited By Tim Mackey - Administrator on 06/02/2011 09:16:40

I saw the Lanc almost go it, it went into failsafe and was only recovered by pilot holding the Tx up high. B-17 went up soon after and after a good climb out seemed to lock out and dive into the ground. Display site is the local club's normal site also. If it was the radio tower then it was doing something unusual as I have in the past flown gliders from a small slope much closer to the tower on 35 with no problems. I think the stopping flying on 35 was a sensible safety precaution as they didn't know what the problem was. 

I notice that it's getting harder to balance some of my older packs, the charger says they are within 0.01v but after a while off charge my Smart Guard reports them as more out of balance. I don't think your balancer is off, unless all your packs exhibit the same problem. Note the real reason for balancing packs is to make sure you don't over charge or discharge individual cells. I still use my "out of balance" packs OK.

Phil, not sure what size batteries you are using, but on my 4s planes you get quite a spark as you plug them in as it charges up the capacitors on the ESC. The way to avoid this is to have a separate lead with a small resistor in it that you make up first, tis charges the capacitors more slowly instead of instantaneously, then you make up the main power lead. Must admit I don't use a switch and just rely on plugging them in, but I do like the separate arming plug idea.

1. Slough Radio Control Models   2. Giantcod   3. Dreamflight Alula   4. Horizon Hobbies

Myron, its not a con, HK have already relesed the DSM2 (Spektrum) compatible units and my 4 channel one arrive a couple of weeks ago, I haven't flown the model its in but it bound to the Tx (Dx6i) with no problems and seems to work just fine. But i had to wait over 2 months for it to be delivered due to the backlog.

Saturday was fantastic for sloping, flew my Le Fish, 4m Discus, Miniblade and Wildthing. Today this afternoon was too calm for sloping so had to make do with a couple of hours power flying. Excellent bank holiday weekend   

Its quite simple, go to page 68 in the manual, in the adjust list go to flaps and you can set the elevator compensation for normal and land.  Just a word of caution though each plane reacts differently to flaps, the ones I have tend to pitch up when flap is applied, so I have some down elevator mixed in for compensation.  if its a new plane I would recommend that you reduce the flap travel initially and try out the flap at height to see how the plane reacts to flap, you can then adjust the flap travel and elevator compensation to get what you need.

Dan Spektrum have built the very neat lightweight all in one RX, 2 servo. ESC unit and E Flite/Parkzone all being part of the Horzon Hobbies group have built several planes around them the micro Sukhoi being one of them.  But if you don't want to splash out on an "expensive" set or lock yourself into the DSM2 system then you can but the Tx's that come with the RTF sets separately for under £25, see here http://www.micronradiocontrol.co.uk/spektrum_radio.html#efl-mlp4dsm at the bottom of the page.

And MacGregor are covering their bases as a division, Hobbyplastic, is bring in the WFly systems probably to compete with the Planet systems from Perkins

Posted by Bravedan on 27/08/2010 07:43:03:  I like both, but I build a lot of flying wings and the 6EX does not have the elevons issue the DX6i has which require a fairly heavy work-round to overcome.  I thought that too, so kept my flying wings on my 35mhz Cockpit Sx which is still the best for these prgramming wise. But if you plug the servos into channel 1 and 6 on the Dx6i and select twin aileron wing and then go to mix and mix elevator to flap (with trim active) it works really well I've just set my Alula up this way so I can use the compact AR6110E Rx which is a very neat fit.

Good to see some more glider reviews, the Fox looks very tasty.

Barry, there is a "review" of the Dx6i in this months RCME

Posted by Chris Card - Moderator on 26/08/2010 17:37:08: Looks promising Tim, please let us know if they live up to the marketing talk as I have to say I've found Hobbyking a little, umm, optimistic, with some of their descriptions in the past. I must admit I didn't think they've been too bad, I've got some Rhino and Turnigy cells which are over two years old and I'm still running them to about 90% capacity on my timer with no problems. I must admit that I don't run them at over 10C though.

Nothing against Futaba as they make very good sets, but the 6EX isn't as feature rich as some others. For instance it doesn't do twin servo elevators very well, you can mix them in but the trim will only work on one half, for similar money the Spektrum Dx6i does this much better.The Dx6i will also do spoilerons, and like the 6EX they are on a switch, but you can set elevator compensation in very easily.  Neither the 6EX or Dx6i can't handle glider crow breaking, i.e. flaps down and ailerons raised, but to handle a 4 servo wing you'd need to be looking at something like a Multiplex Cockpit Sx, but thats in the next price bracket up, but is much more feature rich. Although I have a Spektrum Dx6i I still fly my gliders on my 35 Mhz Cockpit Sx because its got all the required glider mixes built in. If you don't need more than basic programming though the 6EX is a good transmitter.   E Flite also do a whole series of bind n fly models which only work with the Spektrum/JR DSM2 sets.

Can you check the voltage across the battery by a voltmeter, is that above 3v per cell,  i.e. if its a 4s it should be reading over 12v, if the battery is faulty then it could be causing the charger to give an error. Not impressed with the dealer though washing his hands of the problem.

Tony, when you connect with ISP mode are you still able to use the phone, if so then you are connecting via broadband. While I'm not familiar with your modem I'm pretty certain all broadband modems can't connect any otherway, if you are using the same splitter connection at the phone socket then its a broadband connection. The only other type is the old dial up and that required you to disconnect the phone so the modem could dial out. Its probably just different terminology in Windows 7.  

Posted by David Ashby - RCME Administrator on 19/08/2010 07:54:19:    The people I'd really like to speak to are the ARTF designers/developers, just to see how experienced they are and whether they can really fly all that well. Whether they really do fly all their RTF foamies as tail heavy as their instructions always seem to recommend.       Not all designers are the same, the foamys I've had from Alfa, Multiplex, E Flite and Dreamflight had the c of g pretty spot on. The instructions and design of all of these was first class as well.

This is the mixer i used http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4170, bit less expensive than a new radio

I ordered one of the 4 channel Rxs over a month ago and it arrived on Saturday, nit flight tested it but it bound straight away. It is very small.