World Models Extra 160R

[dcoy]

GUys, I just bought my first big plane, well big since Im used to 40's type. I purchased the World Models 160R PW style. Questions are, what is the best power plant, servos and tips from anyone that has built and flown one. Your help would be truly appreciated, I dont want to mess up, since this would be the nicest in my hangar. Thanks

[Vic3D]

[dcoy]

OK, now there is a pic, sorry about that!!

[Vic3D]

Dude that planes is really nice looking! What are the specs??? Ill say it looks a bout 72-74 inch wingspan.... I'd strap an OS 1.60 or a Moki 1.80 in it...

[Vic3D]

Ok I just saw the WM website. It's an 80 inch. 3W 55 would pull that beast around very nicely. Just $535 on sale at Aircraft International.


Vic

[RustyTumbles]

I had one of those with a Zenoah G38 on it. Flew well but was way under powered. If you want to go gas I'd go for a MVVS 45, DA50. If you go glow the moki 180-210 would be good also.

[DStJohn]

I have the same model in the purple scheme and I love it. I have a Moki 2.10 with a Perry pump in it for power. It does not have unlimited vertical, but it is still very good. Plus I got it used for a very good price when the former owner needed the room in his shop

[1943]

go with the kroma 50 from drhobbies

drhobbies.com

1943 bryon

[dcoy]

Im have never dealt with GAS engines before and really have clue in tuning them. Based on the 80 Inch WS, what would be the best 3D, reliable and wont require a rocket scientist to tune. Also servo setups, if anyone has any pics on their setups!! Plzzzzz. Thx

[SleepyC]

I thought the same thing about gas engines a few years back.. but in reality they are EASIER than Glow!

Think about it... how often do you tune your weedwacker?
I've run mine for 6 years and just slap gas into it!

The same applies for RC gas motors...
Once you tweek the needles a bit.. your done...
Charge , gas and fly....

And tuning is not a mystery.
there is a few threads on this site that if you read you will understand quickly!
I say go with GAS... Best choice I ever made!

[Billa]

Have the same plane with a DA 50 upfront. Came out at around 15 lbs which gives you a wing loading of around 29 oz/sft. Sounds heavy when you compare it to the average 72" glow machine but actually isn't at this size of machine due to the Reynold's no. I started out with a Moki 1.8 upfront - had to add 11 oz nose weight to balance and was marginal on power with a bolly 19x6 prop. Now the thing will dance with an MSC 23 x8 and balances just fine with a slimline pitts muffler. In the process of lightening up the machine I went to a single Hitec 5955 TG on the elevators using a dual pull pull system - not the greatest thing when you want redundancy. I am using a 5945 on the rudder (easily enough for knife edge loops) and a 625 each on the ailerons. If you are going to buy new servos then comparable karbonite gear stuff would be the way to go as I am not happy with the play these metal gears can develop. The Titanium Gears are doing great. Also lowered the tail by an inch and half but still needed to mix out the pitch tendency in knife edge so I would not bother with that. This was also my first gasser but once you go to gas, you will probably never look back. I have just upgraded to Li-ions and am adding a TME smoke pump as I got the smoke version for the Slimline pitts.

BTW, the balance indicated in the manual at 6.5 inches from the leading edge at the root will give you a touchy machine. Between 6 and 6.25 is a better place to begin with. Low rates should be very low on the elevators for normal flying. Other fliers at our field with the same machine have gone into harrier mode on approaches because the rate was too high when flaring out and the resultant unplanned pancake was not pretty.

If you have any questions, just shoot away. BTW this plane will do the most wicked inverted flat spin ever and is very responsive in transitioning out to any other 3d manouvre such as a rolling harrier - although I must admit that you have to be on your toes when in the 3d mode with this plane.

Regards,
Aamer

[dcoy]

So basically the best thing to put in forn tof this thing is a DA50 right?

Servos:
Ailerons: 625
Elevators: Dual of what?
Rudder: 5945

I will be buying new servos, I dont have a ton of money to put into the servos, but the best bang for the buck if anyone can tell me. Also, if you have any pics on the setup of the engine, gas tank and any hardware you guys recommend. Such as horns, etc. Dumb question, but here it goes, the root for the CG, is that the leading edge of the wing???
Also, Im using a 9303JR what receiver should I drop in there?

Sorry bout all the questions, but rookie big time here.

[dcoy]

Ok just purchased the servos from Servo City:
Throtle: 5475
Ailerons: 5625s
Elevators: 5625s
Rudder: 5945

Please let me know if this is ok for the servos, thanks guys!!

[Fearless Flyer]

	Quote: Originally Posted by dcoy
	So basically the best thing to put in forn tof this thing is a DA50 right? Servos: Ailerons: 625 Elevators: Dual of what? Rudder: 5945 I will be buying new servos, I dont have a ton of money to put into the servos, but the best bang for the buck if anyone can tell me. Also, if you have any pics on the setup of the engine, gas tank and any hardware you guys recommend. Such as horns, etc. Dumb question, but here it goes, the root for the CG, is that the leading edge of the wing??? Also, Im using a 9303JR what receiver should I drop in there? Sorry bout all the questions, but rookie big time here.

I got this plane for my first 1/4 scale and it was the best thing I ever did. For the engine I am using a OS BGX1 35cc glow. I would go with a DA50 on it because there is no such thing as to much power. I have the Hitec 625mg all around, the 5945 would be a good choice for the rudder. As for hardware I used all that was supplied with the arf. The receiver that should be used would be a basic 8-9 channel. As for CG the root is the thickest part of the wings airfoil, in most cases. Use the CG that is recommended in the manual and adjust from there to personal preference. hope this helps.

[Billa]

Dcoy,

When talking about the CG, I meant distance measured from the leading adge at the "Root Rib". This I found with experiment to be comfortable at around 6 to 6.25 inches as opposed to the 6.5 inches which was written in the manual. If they have changed the manual then I am not sure as I bought my plane over two years ago. I think you got the right servos w.r.t. speed and torque but they are metal gears and not Karbonite. These MGs tend to develop more backlash in the gears with use. The 635 servos or the digital version of the same specs would have been better IMHO. The digitals will definitely have more holding torque too which is good on large surfaces. Anyway, even if you can not change them, these will provide you plenty of fun.

Hardware used was standard as supplied - have not had any major problems there. You might want to change out the metal hinges and put in Dubro heavy duty ones. That is about it. Oh and the wheels needed replacement pretty soon as we have a short concrete runway and end up swinging at the end of the roll out. Switched to Dubro light weight 3" for the mains and 1" on tail wheel and never a problem since.

If you intend to put in a DA50 then be sure to modify engine box for length of stand offs before gluing it in. If you have the Patty Wagstaff scheme then you can not push the cowl forward without replacing the trim to meet the cowling properly. If you have the purple one, then I would suggest that you mount the engine as far forward as possible so that you do not have any problem balancing the plane with those elevator servos in the tail. It is not advisable to put your receiver battery or the receiver within 12" of the ignition unit or its battery so do not count on that weight to bail you out.

Aamer