E-Motor Mount for Pletti Xtra Outrunner
 

Hey Guys
Who can help ? I have a Pletti Xtra 30 Outrunner. I'm looking for the perfect Moutor Mount.
Light and strong :) I build a Rock'n Roll from Ultra RC
SR
CrazyF3A

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hi Crazy, I'm not sure if it would work, but in the Evolution with the Axi, I ran the mount from Esprit models here..
http://www.espritmodel.com/index.asp...S&Category=678

Maybe you could call them to see if they have a pletty mount. Maybe they are the same as the axi. I don't know..

You could also run a budd mount, found here....
http://www.buddengineering.com/Merch...tegory_Code=MM

Which does work with the pletty...

Good luck!!

Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Chris
I am awaiting arrival of my Plett motor to measure and determine which mount I need to order.
I'm looking at the Esprit mount like the AxI 53xx.
Do oyu have any idea of a weight for such a setup, as you're using for your axi.
I don't see any weights for the mounts on there site.

I'm gonna be running the Plett 30-10Evo, Schultze fut 32.80KA ESC and FP Evo 5000 batts
thanks
Eddie

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Eddie,
Your going to have a nice setup it sound like..
My mount is between 60 and 80 grams. Depending on the length of the standoffs...

Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Also, I took a dremel to mine so they may be a little lighter.
Also, you could use carbon plate with the standoffs to save more weight. I would do this but I quit flying my Evolution now..

Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hallo Chris
First thanks for Info
I does not think difference between the two engines is so large. Have me already considers to make this.
I have build for my E-Evolution a motor mount. Look at the Photo. But it is to heavy.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Oh, BTW, the budd mount is maybe 1.5 ounces I think.. I'll weigh it tonight when I get home if I remember..

Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Crazyf3a
Man that's perect info. a lite ply box is my other alternative.
Do you know what the weight of your motor mount box in the photo comes to?
Also dimensions would be "nice" since I'll be putting the same motor on the same plane :D and my motor hasn't arrived yet.

Chris my prebuild weight estimate at this time is 4550Gm without a tail wheel, motor mount box ,battery mount tray,prop and spinner.
I am anxious to see what my AUW ends up at and how it flies as this will be my First Electric.

thanks for the help
Eddie

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Well I don't know much about yours, but my evolution came out 11lbs 3 ounces after the gear block and the carbon gear I put in it. Not sure how it got so heavy as I weighed it early on with all the stuff and had it figured for 10lb 8 ou. LOL
Of course this is electric..

Good luck with your mount..

Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Crazy,

Here are a couple of pictures of the firewall I use with the 30-10 Evo motor, very simple, just 1/8" lite-ply with carbon laminated to each side. You have to use a backing ring for the bolts or they can easily crush the firewall, so 2mm solid carbon, or 1/8" aircraft plywood work well. The ring just needs to be big enough to support the washers on the bolts. As shown this firewall weighs 22 grams.

There is no need for a softmount with an electric motor, just extra weight and expense that is not required.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hallo Chad
My secound plane is a ZN Synergy with the Pletti Evo and.... and.... The same setup you have in your twister.
I will copy your motor mount. I saw and read in your build report from your Twister. The idea with the Ring on the backside is very good. What you think about Balsa front wood instead of plywood, with carbon.
thanks for help

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hallo Chris
I will weight my E-Evolution tonight. I have the carbon gear from ZN LIne and the Pletti 30-10 with the schulze ESC KA 32-55.
I would like to speak gladly about your experience with evolution but in the evolution forum.
Thanks also to you for your information.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hi Eddie
I will weight the motor mount tonight. I will give you any information about build.
Have a nice day

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hallo to All

Eddie:
The weight of the motor mount is 64.5 gr. ~ 2.27 oz. I have a picture in corel Draw. Please send a PM if you want the File.
I have build in aircraft Plywood 0.118 in laminated with 80 gr. (0.176 lb) Glass fiber one time.
Chris:
I have weight my E-Evolution today. The weigt is 4.783 gr. (10.5 lb) with all components. (Ready to fly).
The setup was: Pletti Xtra30-10, schulze 32-55, APC 21x14, Gear from ZN-Line, Lipo: Emcotec 10S2P Emcotec 4000mAh (1150gr.) That's it.
I hope correctly converted.

Thanks to All for infos and comments.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

I agree. Soft mounting isn't needed.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hi there Everyone,

Well, that I could have look at Esprit model (didn’t ask do if thy have one for Pletty “Ops” ) thy
don’t have one that could be use without any modification.

Well I’ve decided that will make my own.
And it isn’t that hard to made one of the back plate. I’ve only used there Rods.

A Picture can (says) describe better than word so, here follows a couple of pic’s of my set-up.
Pletternberg Extra 30-10 Evo motor and plane JM Composite Leviosa.


Regards,
Danny Koolman
www.arubarcclub.com

RE: E-Motor Mount for Pletti Xtra Outrunner
 

The setup was: Pletti Xtra30-10, schulze 32-55, APC 21x14, Gear from ZN-Line, Lipo: Emcotec 10S2P Emcotec 4000mAh (1150gr.) That's it. How's it fl;y with the Plett 30-10. I almost went with that motor but decided to get the new 30-10 EVO
thanks for all your help
Eddie

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hallo Eddie
My first Motor was the Xtra 25-13 with a RASA 18.5" x 12" prop. The power was good. One year later Pletti was comming with the Xtra 30-10. More power and the prop I have flown was from 19"x12" to 21"x14". The motor was newer constuction. I had flown last year until 130 Flights with the 30-10 No Problems. Not in one of my flights I had a problem. I dont need more power. It's enough for me but Pletti thinks differently came with a new motor. I think Its good so. In Autumn last Year after the EM in Swiss I buy the Xtra 30-10EVO. This motor is standard I think. I cannot say how the power is. I dont have flown. Everyone says fantastic I think also.
Your decision to buy the new EVO engine is absolutely correct although the power of the 30-10 is enough. That is my opinion.

SR
andreas

RE: E-Motor Mount for Pletti Xtra Outrunner
 

I wanted to show what I ended up doing.
I modified the mount from UltraRC for the Hacker to accept the Plett.
Crazyf3a thanks for all your help.
Eddie

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Our lives would be so much easier if plane designers built the fuselage to a proper length ;>

RE: E-Motor Mount for Pletti Xtra Outrunner
 

OR if the motors used anything remotely resembling a "standard" as far as mounting....jeez.

Try to design a plane to accept everything....sometimes the best solution isn't what everyone else is doing. But I do love the look of carbon, and cool supports and stuff...I just hate building it, especially when the motor is likely to be swapped out and replaced with 15 different types.

Torque on these things sucks. It scares the bejesus out of me every time I see a massive outrunner mounted only by the nose of the plane. Seen way too many fail. Seen em fail with tons of carbon and supports too.

There just has to be a better standard than mounting to a nose....

-M

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Who said mounting to the firewall was a good idea? I'm just saying that if this fuselage would be have been made 6" longer, the result would be a much lighter and simpler airplane.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hello to all.
I thought always too much over the motor mount. It give so many variants. The most important is that it holds and I can say to myself its OK.

Hello Eddie:
your ventilation is ineffectively at least for the engine or esc. I white not however which you would like to cool . Your modified cooling is good for a Hacker but not for the Pletti. Think about it. Look at the photo of the Evolution. I have only cut my spinner. It is the not beauty but effectiv.
Here are two photos from the motor mount for my Synergy. (Copy by Chad) I think It is perfect for the pletti in my Synergy. This is the only way to build a motor mount for Outrunners like Pletti or Axi ...., with a Backplate mount in a Fuselage. I think the problem for most builders is to build a motor mount that is light and good. But who said this is good or not.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

That is true....very true.

Mounting to the firewall works well, but the firewall has to be a solid brick wall. It works but best solution? Well, the best solution is.....who really knows yet, since there's nothing even close to standard about any of it. Hence why there 1001 different ways to mount it, and one that has a higher than normal risk of seperating the nose from the rest of the plane. I hate it when that happens...

-M

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Since we are discussing this, there was only 1 person that I know of that had any long term (full season) success nose mounting an outrunner without any back support. Now his plane began to structurally fail but he caught it before it tore the nose off. I think nose mounting will work only if you have a back support and only if you are using a full fuselage setup. Not a fuse with a composite nose grafted onto the front. Not enough strength with that set up. Like some others have posted, it seems there are really only 2 options: bolt motor directly to a firewall or use a mount with standoffs like the Esprit (Cambria) type mount. Mike alluded to the power and torque these motors have. Everyone who has seen one run for the first time is amazed at the power and can see why they would twist the nose right off a plane. Big outrunner + weak mounting = broken plane.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Adam & Mike
I was concerned about the firewall in the Evolution after reading Chris's evaluation with his Axi. I did add the brace Eric Henderson recomended and have read recently that Chris said it hepled on his( I missed that earlier). I only have 5 flights so it is premature to say this is gooing to hold up - but so far it feels stiff. The evolution is a ply box down thru the center of the plane with a plane formed around it by stringers on the bottom and a foam turtle deck on top.
I realise this is different than what you guys are currently discussing about the composite fuselages with the motor mounted to the nose. I just wanted to share my observations about my setup.


Hello Andreas
Yeah I know the ventilation fins do nothing for the plett. I just didn't remove them. I may end up closing the 2 holes on each side of the cowl that direct the air into these fins and thusly behind an outrunner - too early to know. Of course if I do -I'll remove the fins.

I am experimenting with a cooling spinner not too different than yours. When I have some good information to share I'll post it. So far I've only gotten 6 flights on the Evo-Plett so I haven't had time to test yet.

The opening in the cowl under the spinner is directed to the esc and the batteries. I have a baffle in the cowl to close the pipe tunnel since my batteries are inside the plane.

One of my biggest concerns was how much air would get inside the fuse to the batteries. -So far they are staying cool -but it ain't August in Louisiana YET!!

Thanks for all your help.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Mike

My firewalls are far from brick solid, simply 1/8" lite ply with 5.7 oz carbon on both sides, and mostly cut-out for weight/airflow. Pretty much everyone who has ran the Pletty has mounted it this way, I know of none that have failed in a variety of aircraft....thats thousands of flights of proof that firewalls dont need to be complicated, heavy and over engineered.

I cant speak for any other outrunner, maybe they are simply out of balance and inducing huge dynamic loads into the structure.

For anyone running a Pletti, the mount that I use works plain and simple no need to more.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Chad can you post up some pics here? Or just link to some?

I'm just trying to find solutions, definitely not trying to say "my way" is better worse or anything. I'm searching. The mount I'm using the like the Esprit Cambia mount, with long stand offs....so there is a good bit of torque out there, a pretty strong moment. A 16 ounce motor is probably not as bad as that monster AXI. I just hate taking chances, structural failure is something that I can live without...

And it has happened, with certain outrunners mounted to certain planes using the nose only. MOST don't fail, but if there's a chance, I like to take the less risky road.

-Mike

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Hi Mike

In post 10 of this thread you can see the firewall I have in my Twister (same as what I flew in Muncie). I dont know if it would work with other outrunners as I have never tried, but it works on the Plett motors quite well.

As with anything if your carbon is not well bonded to the wood you are going to have problems :)

I have the same setup on a Genesis 3D which has a much larger front end than the Twister, so far so good.

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Well, make that two people that you know of as I have run 3 outrunners nose mounted with no problems. Also, other I know of, Tom Messer, Don Atwood, Scott Covey. Well, Scott did rip the front off of his icepoint, but I figure that's just being that it was designed for glow.
There are several that are doing it successfully. Some, not so successfully. Depends on the builder. And also, I have seen people not balancing their props on the Axi. Reason being, is the 12mm hole we have to put in the prop. Some people may get their hole a little off center. Now there is the 8mm adapter available. Should help to fix the problem some I figure.

Another reason, the structural integrity of the plane. There was no way I was nose mounting it in my Abbra. Fuse is way too weak IMO. But with a firewall, it's great. I used (way overkill) double 1/4 balsa endgrain, carbon laminated as my firewall. I was taking no chances. Plus, it was pretty light.

Planes have got thinner and thinner. The props, and torque have increased so much that it's important for most to mount with a firewall IMO.. I will most likely mount from a firewall from now on as I feel it is necessary for most of todays designs.



swlarcham:

The brace helped alot with keeping the motor in the Evolution IMO. Credit to Eric for that one!! But the firewall still has quite a bit of movement.


Chris

RE: E-Motor Mount for Pletti Xtra Outrunner
 

Well, we made one with the AXI and esprit mount about a year ago, and it is still going strong as well...but it's firewall mounted on standoffs. Weight isn't an issue. You can swing that thing by the prop and the spinner never moves.

Actually Chad, I was looking for pics of it mounted in the plane?

Thanks!
-Mike

RE: E-Motor Mount for Pletti Xtra Outrunner
 

I remember the pics of it Mike. Was quite nice.

C