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Member postings for Shaun Walsh

Here is a list of all the postings Shaun Walsh has made in our forums. Click on a thread name to jump to the thread.

Thread: Buying LiPo`s
11/12/2019 19:02:43

If you want 3S 2200 mah lipos then hobbyking have their Rhino brand for under £7 from the UK warehouse, they have had some good reviews. I have a dozen hobbyking graphine batteries for a couple of years and they are still good. The nanotech batteries seem to have a poor reputation but I think hobbyking have brought out a mark 2 version, don't know how good they are.

Thread: Max Thrust Riot - Upgrades
03/12/2019 16:14:11

Strangely enough, mine was just fine "straight out of the box" apart from the battery box design. Was I just lucky?

01/12/2019 15:09:32
Posted by SCRCS on 01/12/2019 14:39:05:

Is it possible to use a watthour meter to check if a servo is drawing excess current because it is binding or is the current resolution too big on a watthour meter to register. Not sure what a typical servo current is but watthour meters seem to have a minimum resolution of 10 mA.

Edited By SCRCS on 01/12/2019 14:39:31

You might be better off with a dedicated servo power analyser.

01/12/2019 13:48:33

I haven't had any problems with the esc over the last 12 months flying and the stock motor draws 27 amps with an apc 12x6. Yes, changing the esc and the motor are both very easy.

Thread: Christmas Excess
30/11/2019 18:44:47

1st December tomorrow, time to put the sprouts on for Christmas dinner

Thread: Max Thrust Riot - Upgrades
30/11/2019 07:12:22

I have a MK1 Riot and the battery bay is probably the worst feature of the model. In order to fit a decent sized battery I had to cut away the base of the bay and attach a velcro strap to the ply former underneath. The other problem is with the hatch, after some use the side catches crack and break. To strengthen them I epoxied a length of thin piano wire along the sides of the hatch on the inside to act as a torque rod, this seems to work well.

The riot responds well to a power system upgrade too, I swapped out the original motor with one from 4-Max which puts out about 400 watts which enables a vertical climb out on take off although enthusiastic use of the power does reduce flight time of course. To be on the safe side I also upgraded the ESC to 50 Amps.

Thread: Getting my head around electric motors ??
27/11/2019 11:22:45

You probably need something like this, 755 watts 1250Kv


Thread: A new caption competition - winner declared!
27/11/2019 11:09:39

Please don't take a fence.

27/11/2019 11:06:46

And this is the club's re-kitting machine.

27/11/2019 11:04:49

Get orf my land!

Thread: Spektrum DX9 Crow Programming Query
14/11/2019 23:13:45

Can you not just reverse the throttle function in the settings?

Thread: How much does an RC hot air balloon weigh?
05/11/2019 18:39:00

This does raise an interesting point.

If I am not flying my model plane the regulations don't apply.

If I am flying my plane how do I know what it "weighs".

As soon as I land and can weigh it the regulations cease to apply.

An interesting conundrum.

05/11/2019 18:35:15

I think this question belongs in the same category as "If I attach a piece of string to my drone is it a kite/control line model"

05/11/2019 18:32:50

Going up it will certainly weigh less than 250g but coming down it may weigh more laugh

Thread: Orange RX R620X full range rx.
04/11/2019 10:13:47
Posted by Denis Watkins on 04/11/2019 09:46:28:
Posted by Ace on 04/11/2019 08:55:33:

However you might want to check but I don't think the stabilized 7 has a failsafe option ?

You are right ACE, no failsafe

But in this case I added the low cost add on failsafe into the throttle servo lead

You just set your throttle to low

Then press the button on the small board in the middle of the lead

At loss of signal, the required action operates

The stabilised 7 channel receiver by default will shut the throttle and maintain last good control surface position on loss of signal, however you can define your own failsafe by setting the required control positions and pressing the button on the receiver. Mine is set to low throttle and stabiliser in position 2 so, in theory, if signal is lost the motor cuts and the stabiliser rights the model and flies it straight and level until signal is regained.

03/11/2019 14:43:51

I have four Lemon receivers, two 6 channel and two 7 channel stabilised.

The 6 channel receivers have removable antennae which can easily pop off so they are hot glued on to prevent mishaps.

The 7 channel stabiliser works well and copes well with gusty conditions.

No hesitation in recommending them

Thread: speed 400 x 3!
29/10/2019 11:31:02
Posted by Alan Gorham_ on 29/10/2019 11:19:21:

Blocking current in the link you quoted is stall current Shaun. A Speed 400 cannot handle more than around 9A continuous before the brushgear gives in.

Therefore lets say you prop the motors for 8A each you can use a 30 or 35A ESC.

I did suggest the method of checking the current that you are advocating in my post of 0945 this morning....

Thanks Alan, never used brushed motors so my knowledge is limited.

29/10/2019 10:25:29

How about three small brushless motors and three ESCs? Would probably be lighter and more powerful but not in the vintage spirit.blush

29/10/2019 10:23:02

Looking at the spec for the Graupner speed 400 motor


It seems that you may be limited to a 2S lipo because of the maximum voltage of the motor. Also the max current is 21 amps which in theory means you would need a brushed speed controller with a capacity exceeding 60Amps! I wonder if the reason that the plan shows a 33 amp speed controller is because the Nicad battery pack wasn't capable of providing much more current whereas a Lipo will. Suggest you attach an ammeter and run up a single motor and prop to check how many amps are drawn at WOT, if it's more than 10 Amps you may have a problem., even if it is less than 10 amps a nose over on take off will quickly fry the ESC unless you shut down the throttle immediately.

29/10/2019 07:27:24

According to the plan it uses a Graupner Pico-Mos 33 brushed speed controller and a 6 or 7 cell Nicad battery so you could probably use a 3S Lipo but not sure how easy it is to get a brushed speed controller that big. Someone is selling a Pico-mos on ebay though.



Edited By Shaun Walsh on 29/10/2019 07:30:36

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