David Jacobs

Hi and thanks for all in depth responses. Yes I use straightforward Park Fly type planes, typically using a Plush ESC (with integral BEC). In my stupidity I watched a YT review of FrSky V8R7-II 2.4G 8CH Receiver where the tuber said that that due to the voltage they could not be used in a 3 cell... Otherwise I would never have question it. Thanks again...

Yes i do mean 2 cell Lipo. Maybe I'm misunderstanding the effect. I use 4 cell lipo.

I'm moving from Spektrum to Taranis so just getting my head around various matters. I note that the X8R reciever that comes with the Radio has an operating Voltage of 4-10v - Does this mean it will only work with up to a two cell? Thanks

Cell voltages are all as they should be. I was charging at 5a - I always do and for a limit of 110 minutes. These are replacements to old ones I had so just doing what I would normally. I'll run them now that they are all fully charged and balanced and see whether the next time they will charge on the balance option . Thanks for all your help.

Denis - Its a 20a Power Supply Matty - Yeah I do have a limit for safety reasons. I t has been suggested that "Discharge some down to about 50% and charge again at .5 or 1 amp max. Problem is your charger balance circuit is not heavy enough to get these in balance. This is becoming "the new normal" due to shipping regulations requiring them to discharge much lower than in the past and causing an imbalance that many chargers cannot correct at high output charges." I'll give that a try....

Denis, Its a Hobby King HK4B6. I use it all the time works fine on my old batteries. Alan, They are all balanced @ 4.21/2 - I always charge on the balance option rather than normal charge option. I have three charge options, normal, fast and balanced. I've done a normal charge and all worked fine. Really strange why it would'nt balance charge - I guess i'll need to keep an eye on them. Thanks Edited By David Jacobs on 30/03/2017 16:55:49

Just received Turnigy 5000 4S from Hobbyking. As usual with a new battery I have Balance charged at 5a. However unusually I the charger has not reported Full (and stopped charging) after three full cycles now. I have four of these and all are doing the same. I also received some 2200 3S they charged fine. Do I continue balance charging or zap in a normal charge? I am well used of charging LI-PO's but never had this before. Any advice appreciated. Thanks

Based on the advice from DAVID!!! I bought the Hobbyking 4010 820kv 'donkey' brand I bought this. It is NOT a direct replacement and CERTAINLY not the same, it's considerably larger, it can be made to fit though you will need to fly without the Cowl and redrill the holes making the holes extremely close to the edge.... Not sure how, if you made this replacement you did not notice this....

Ok Thanks for advice.

I Bought one of these POWER-TECH 20AMP POWER SUPPLY  **LINK** about Eighteen months ago. In the past few weeks it smells like its burning but appears to be working still. Can anybody advise what I can do to remedy this as it cost around £40, also is it normal for these to go faulty after such a short time? Thanks David Edited By David Jacobs on 16/12/2014 16:08:37 Edited By David Jacobs on 16/12/2014 16:09:45

Thats fantastic. I will give it a try. Thanks

I have just built an Irvine Tutor using an equivalent .46 Electric motor. I tried it at the club and it was diving a little. Club members checked it and suggested using washers under the motor mounting bolts to counteract the dive. The problem is I cant recall if the washers should go on the lower two bolts or the upper ones. I appreciate the advice.

Used the blu-tack option worked a treat. Thanks for all the feedback.

I am using captive nuts and am trying to find a way of gluing them in without getting glue on the inner thread. Vaseline is too difficult to work with in the small area I am doing so any ideas appreciated. Thanks

Many thanks that's very helpful.

I am just building an Irvine Tutor which takes Standard Servos. I was going to buy Corona metal gear servos from HK but the STandard Corona servo is only 32mm long not standard!! I'm therefore a bit lost as I dont want to pay more the a tenner each and have used Corona successfully in the past. I was therefore thinking of keeping it simple and going for Futaba S3003 but it struck me that the fitting may not be compatible with my Orange recievers. Any advice on either point appreciated.

Many thanks AGAIN. Just one more question while I'm ordering from HK. They havent got stock of the **LINK** Servos I have used in the past. Would you advise on a suitable alternative. Cheers

Yeah I cant find the recommended motor anyway! Will go for the HK that you recommended. What size prop do you think Also do I need a prop adapter? Sorry probably V Basic questions, thanks

Hi Many thanks for all your advice. I am putting an order into HK and like the look of the one you identified **LINK** In terms of actual fitting it is likely to have the same fixing points as the recommended The recommended Given there is not a significant cost difference would you suggest going with the recommended motor? In terms of battery would this be adequate for say six minutes of flight: **LINK** Many thanks

Interesting. I'm hardly an expert solderer myself and that part does concern me. As I mentioned I am a newbee to this but surely there's still significant soldering using the sk frame? What is used for electrical distribution? Presumably still a number of bullet soldering required?

Interesting. I followed a number of Youtube threads and was directed to the HK frame Q450 Glass Fiber Quadcopter Frame 450mm - Integrated PCB Version. Was there a reason why you went for the SK450, perhaps i've missed something (highly likely) I'm totally new to this. Cheers Dave

Hi Mart, Im also looking at building a "basic" 450 what did you end up buying? I was opting for the cheapo HK stuff (total about £100 w/out battery/receiver) though I read something about the ESC being a less responsive than these **LINK** . Any advice appreciated..

I'm looking to build an Irvine Tutor. I've only been flying since the Summer and am still on the whole a buddy lead. I have a foamey Max Riot but its simply not man enough in winds of over 15mph. I have therefore been advised to buy a Irvine Tutor or similar and am wondering if I can use my existing batteries (3s 30c 2200's) rather than going for the recommended setup of 4 cells? Also what motor I may marry with this? The suggested setup is with a KMS Quantum 4120/05, they are around £60 so I wondered if I could go for a Hobbyking/cheaper alternative. Thanks for advice.

Hi Phil, Sorry for delay only just picked up response. I am of course THE David Jacobs! I read your response and will be buddying via a cable - I am totally new but dont understand this part of your response: What you need is encoder campatibility - your Turnigy will need to send its channels in the weird Spektrum order - ie throttle, aileron,elevator,rudder - electrical compatibility is unlikely to be a problem as although Spektrum and JR ppm is actually AC coupled at full battery voltage, they are quite tolerant and will work with positive or negative-going DC coupled ppm at battery or 5v levels. Does it mean that I have to set my radio so that it is aligned with the same channel order as tthe Spektrum? I'm not sure how I would do this??? I was at the club today and they plugged a Spektrum in and there was no control. Thanks David

Thanks for feedback. Not sure i'm confident or skilled enough to start cutting it up, also I dont have the relevant tools. I was hoping there may be a conversion kit. Many thanks for your advice though.