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Ripmax Acro.Wot Mk2 XL

servo's required

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Graham Tungatt07/07/2015 14:54:06
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Just purchased the Acro Wot Mk2 XL. Instructions are not clear on what rating Kg/cm torque servos are required for rudder, elevator & ailerons. Does anyone have better information on this?

Bob Cotsford07/07/2015 16:10:55
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8945 forum posts
498 photos

I would have thought 5-10kg would do the job, maybe a bit more on rudder if you are intending to be a hooligan with it. One elevator servo or two? If it's two, you might even get away with using 'standard' servos except that metal gears are generally recommended for petrol motors.

ChrisB07/07/2015 17:40:05
1220 forum posts
34 photos

Like Bob says, i'd go for 5-10kg. I'd go for Hitec 645mg on 5 cell on the surfaces. Just out of interest Graham have you built/assembled an aircraft of this size before?

What engine are you going to use?

Cheers

CB

Edited By ChrisB on 07/07/2015 17:44:52

Graham Tungatt07/07/2015 19:27:02
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Thanks for your recommendations guys, I was thinking myself 9 Kg/cm for rudder & elevator, 5-6 Kg/cm for each aileron with using 5 cell power.

For your information, like the Wot 4 XL I have, the elevator on the Acro Mk2 XL uses only one servo and one for rudder. I am going to install the OS 33GT petrol in this one. CB,I have built and flown this size before and even had my own aerobatic design published many years ago in one of the magazines, not RCM&E though. named PACER, you can google it I think.

Thanks again Bob & Chris.

Braddock, VC07/07/2015 19:55:29
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1687 forum posts
52 photos

Look here, nice one graham. Pacer sports aerobatic model, it's in one of the build blogs.

Geoff S07/07/2015 19:58:33
4033 forum posts
68 photos

Is that the same Pacer as sold by Maher's in ARTF form? I have a Thunderbird from the same stable that, I think, shares the same 84" wing. Mine has a Zeoah 26 for power. I was hoping to take it to the fly-in this week end but, as it hasn't been flown for a year, I wanted a few flights under my belt this week and the weather isn't being kind

I have separate servos for the two elevatore halves and a beefy 1/4 scale servo I'd intended to convert into a sail winch for the rudder. It's getting a bit tatty now and could do with recovering.

I've flown it a lot in the past and it's a very nice aeroplane. I assume the Pacer would be similar.

Geoff

Edited By Geoff Sleath on 07/07/2015 19:58:59

ChrisB07/07/2015 22:28:37
1220 forum posts
34 photos

Nice one Graham. I fancy the Acro XL myself and an OS 33. Have you run the engine yet? What are your thoughts on it and the quality of the kit. I'm currently putting the Wotty XL together and overall i'm impressed, although some of the fittings could be better.

Cheers

john stones 1 Moderator07/07/2015 22:39:11
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11915 forum posts
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I like hitec 625mg's as well they're a bit quicker than 645, pacer similar to laser 200 ?

John

Alan Pennington07/07/2015 23:31:02
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174 forum posts
46 photos

Hello Graham,

I have just been reading this post and I see you are the designer of the Pacer I thought the name rang a bell.

I am building the Pacer at the moment, I did put a build blog on about this model but I've been having health problems as well as doing alot of renervation work on are house here in France, the model has had to be put to one side. I am starting again on the model after some time, so it's blow the dust off and get cracking again. So far I've joined the wings and glassed them, the tail plan is glassed and now I'm on with the fuselage. As I said in my blog it's a great looking model.

Cheers Alan

Edited By Alan Pennington on 07/07/2015 23:31:42

Edited By Alan Pennington on 07/07/2015 23:33:28

Colin Hooper08/07/2015 12:14:59
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48 forum posts
21 photos

I have just completed the build of the Acrowot XL and have chosen to use Hobbyking sourced Towerpro 996R servos all round. I have used these in quite a few models and have had absolutely no issues with them.

The XL is fitted with a DLE35RA and needs no additional weight to achieve the CofG.

Assembly is straight forward. My only hiccup was with the elevator push rod which can be installed upside down. It then won't line up with the servo arm!! The tank fitting also needed a little thought to stop the tank going too far forward and interfering with the choke butterfly on the rear carburettor of the DLE.

It looks one heck of a model on my driveway and if the weather relents it will be maidened before the week is out.

Graham Tungatt08/07/2015 15:18:02
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12 forum posts
1 photos

Hello Colin Hooper, You haven't wasted any time putting that together, good to see you are ready for the maiden flight, best wishes with that and hope it all goes well. Thanks for your info with the servos and taken note of the elevator push rod etc.

Graham Tungatt08/07/2015 16:09:37
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12 forum posts
1 photos

Thanks for your comments questions and interest with the PACER, to see what it is like please open Albums then select my name.

IanN08/07/2015 16:35:28
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1675 forum posts
119 photos

Was that the model that featured in the "Big Stuff" series in RCMW a while back?

Colin Hooper09/07/2015 17:21:45
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48 forum posts
21 photos

Today the weather has been superb and the Acrowot XL has had its maiden flight, which was absolutely drama free. This model is a keeper as it flies superbly and has a great deal of presence in the air.

Graham, you will be well pleased with it when you get it assembled.

Graham Tungatt10/07/2015 10:26:15
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12 forum posts
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Hello Colin, thanks for your good news with the Acrowot XL, very encouraging. I was out myself flying yesterday with the Wot 4, was a great day, the last flight was a bit dramatic when one of the main undercarriage wheels dropped off during flight. Pleased to say landed safely in long grass.

Must get on with assembling the Acro, thanks again for your feedback.

Former Member13/07/2015 13:40:24
756 forum posts

[This posting has been removed]

Jon Laughton13/07/2015 16:54:18
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1241 forum posts
72 photos

Would love to see a video if possible?

Braddock, VC13/07/2015 17:26:18
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1687 forum posts
52 photos
Posted by Graham Tungatt on 10/07/2015 10:26:15:

Hello Colin, thanks for your good news with the Acrowot XL, very encouraging. I was out myself flying yesterday with the Wot 4, was a great day, the last flight was a bit dramatic when one of the main undercarriage wheels dropped off during flight. Pleased to say landed safely in long grass.

Must get on with assembling the Acro, thanks again for your feedback.

The wheel or the plane? devil

cymaz13/07/2015 18:08:51
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9596 forum posts
1267 photos
Posted by Andrew Ray on 13/07/2015 13:40:24:

I have just been assembling my fuel tank and realised that the bung is a black rubber bung just like those supplied for glow fuel, has anyone else noticed this?

A few years ago a couple of club mates had their stock bungs tanks leak badly. I always put a Dubro tank in a plane

Tomtom3913/07/2015 18:33:29
708 forum posts
1 photos

I have just bought one. I will be fitting some Savox 0254 all round (I managed to get a good deal at Wings and Wheels).

Cymaz - agree with that point. Best to fit a Dubro. Found that one out by experience!

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