yes or no

im in the market for a 50cc ultimate.
what mods does it need.

who all makes a 50cc ultamate

I'd like some info from those who own this plane too

I had one last summer and GAVE it away after 12 flights. The guy I gave it to changed a bunch of stuff and said it was acceptable after that. I just lost patience with it. The stab incidence was way off ( he changed it ) the top alumin. wing jointer worn almost thru in 12 flights ( he fixed that ). The covering was very poorly done and kept coming off. The plywood was so weak in the firewall I distorted it by tightening up the engine mount ( I fixed that ). It came out at 17.5 lbs. ( Taurus TS 52 ) which I felt was too heavy espesecially with the added drag of the 2 wings. It flew so poorly ( mostly because of the stab incidence ) that when I arrived at the field I lost interest in even putting together ( another pain in the ***).

Other that that it was fine Some guys love them I guess but you asked for opinions and that was mine

From what I have read on RCU if I wanted another ( maybe ) I would go for the GP Ultimate.

hi guys great plane for 3d & flying around its had over 300 hard flights .The imac is a little hard i have had mine for 12months & still love taking it out & freaking people out with it they land very slow.Make sure you get a gen 2 the servos are in the wings that how you tell[8D].I have a 46 size nitro one to for fun to
power mvvs 58
hitec 645 servo allround
i got the yellow one & im building a 42% wm ulti now
good hard ware servos motor & away you go.personly you can go wrong,
you can fly this bird real tail heavy for insain 3d
cg

Yours looks different than mine. They maybe improved them, it needed it.

What do you mean "the servos are in the wings" where else would they be ?

hi mate that is the older one.i should of explained more.the servos are set inside the wings & yours were on the outside of the wings if im right it looks like they are.mine bolted onto a plate then sat in side the wings
cg

I have the 1st generation world models ulti, and it flys great! Its the same as the aeroworks offering that was discontinued. Once you dial in the proper throws. Mine tracks great, no issues w/ stab or wing incidence. Remember, this isnt a pattern plane. It felt short coupled at first, but once trimmed, balanced and set up properly, its a ball. Brison 3.2 on mine, great power, starts in two flips. A little elevator mixing and it will knife edge like a champ. Remember, this is a 27% plane, its not going to fly quite like its 33% big brother, but a whole lot easier to transport. (fits in the bed of my truck fully assembled) mine came in at 16 lbs dry. Its built light, so make sure you check all the formers. As for mods, I pulled the bottom covering off for closer inspection, and to set up the pull-pull.(its way easier that way) I re-inforced the cabane mounting. I opened up the top of the fuse and epoxied some braces (between the uprights) in there so the struts wouldnt flex side to side, then replaced the foam and balsa sheeting, no problem, stiff as can be now. Made a lite ply inspection plate at the botom of the fuse, under wing, replaced antirotation pins with threaded nylon bolts mounted in wing so I could 'sinch' the wings in, via the inspection cover. These are simple mods, do-able in 2-3 evenings.Theres alot going on aerodynamically with biplanes, so before you go nuts splitting hairs with the incidences (as long as they are not WAY off), play with the throws. On low rates it goes where I point it, a little throttle managment on landing and it settles right in. On high rates this plane can spin like a top, roll faster than lightining, Knife edge spin, tumble, you name it, it can do it, and if you have the kahones to take it on the deck for a hover.....well lets just say its name says it all. I have yet to be disapointed with any of the world models kits.

Ted

I would avoid World Models full stop,
Having had two absolutely awful kits (84 inch Extra 300s and Groovy 90).
Terrible build and covering. Splitting carbon U/C after two flights on the Groovy. NO MORE W/M rubbish for me.
Just M.O.H.O.

This is what happens when you ask a "what's it like question" You get those who love it and those who hate it. I posted the same question a year ago about a 50 cc engine. I had about 150 Yea's and no Nah's. I thought I was all set. I bought the engine and had nothing but trouble. From now on I'll pay my money and take my chances.

here are a few flights of mine.i fly them hard im not in it
about 10 months ago & i started flying 12months before these vids enjoy
cg
http://www.flyinggiants.com/gallery/...o=2194&cat=504
http://www.flyinggiants.com/gallery/...o=2385&cat=504

That's too bad.

Several of our club members have their planes including myself, and we have been quite pleased with them after hundreds of flights.
I have several of the Ultimate 40S. The plane has a nice finish. A little preliminary prep and minor re-inforcement has been all that mine have needed, to avoid problems... The "ChinaKote" leaves something to be desired, but a little clear coating helps a lot.
Other club members do likewise with other planes from WM.

does it have a flat stab or is it air foiled

HI they have a very thin airfoil same as the wings so if the motor stops the plane will not fly far.
cg

Huh?

The horizontal stab is a standard 2% flat balsa airfoil, but the main wings utilize a symetrical thin cross section naca0012 (or is it naca0010?) airfoil.

These thinner wings have lower parasitic drag in flight, and actually HELP the plane to keep speed up. The thinness of the wings makes the plane fly further, due to the lesser drag, but the offset is that the wings provide a higher stall point than thicker wings.

Biplanes posess two wing surfaces and a large frontal cross section.

The combined effect of the frontal drag from the multiple surfaces is what slows the plane down NOT the thinner wings. The thinner wings actually help if anything.

As long as you keep up speed the plane WILL "fly far"... and of course the only thing you can trade for speed in a deadstick is altitude...

[/quote]

Huh?

The horizontal stab is a standard 2% flat balsa airfoil, but the main wings utilize a symetrical thin cross section naca0012 (or is it naca0010?) airfoil.


[/quote]

I have to disagree with you on that. I don't have a World Models Ultimate, but I'm thinking of getting one, and its pictures clearly show that is does NOT have a flat airfoil as you stated, but rather has a thin symmetrical flying stab. Some other 27 -29% Ultimates such as the Great Planes version and the Wild Hare version have simple flat stick constructed stabs, the World Models version has a thin symmetrical airfoiled stab.

Well I -DO- have SEVERAL WM Ultimates... up to the 1.20 which do have the 2% flat stab tails.

If the thin airfoil is used on the 33%, that is of no matter, vis-a-vis the statement about drag.

The thinness of the wing helps PREVENT parasitic drag.


At least in the photos of the 33% there does appear to be a thin airfoil used on the tail.

I haven't seen the next smaller Ultimate yet.

The title of this thread is "World Models 50cc Ultimate" .. with that fact in mind, we are not talking about the Ultimate 120 which has a 53.5" span, but rather we are talking about the 27% 50cc Ultimate which has a 63.5" span. The stab is airfoiled.

Ok, though my reply was to addressed the misconception about the thinness of the airfoil causing increased drag.

No problem, and I totally agree with your explanation of airfoil thinness and drag. I do have a question I've been wanting to ask of someone in the know. Which type stabilizer, flat or airfoiled works best for 3D style flying? The reason I ask is because I have been collecting as much info as I can on 50cc size Ultimate and which will fly the way I like to fly best. I have downloaded a few videos of various Ultimates flying and the best 3D show I've seen was from downonthedeck.com with a guy flying a Wild Hare 50cc Ultimate which has a flat stab with flying wires. He obviously had a rearward CG and was flying in a 15mph wind, but that thing did the prettiest torque rolls Harriers and high alpha flying I've seen from an Ultimate. I watched another video with a World Models 50cc Ultimate and although it was doing 3D high alpha and the sort, it wasn't as impressive. Of course that could have been the pilot factor as well as the setup factor, and wind factors. So, I guess my question is ... does a flying stab stall as quick as a flat stab when you want to do wild aerobatics in a model?

My guess would be an airfoiled stab is better, you will have more drag but if you're into 3D that means you won't fly fast, and you WILL use some little extra lift back there

ANY THING WITH TWO WINGS WILL CAUSE DRAG THIN THICK FAT WING IT DONT MATTER
huh what do you own this plane if not dont chim in with a bs..keep speed up it will fly far lol its not a glidderi have a 46 nitro size & it has flat stabs .I have a 27% & it has not.I built a 33% & is the same as the 27% & now i got a 42% & is the same as my 27%
now go watch my vids im flying in 15 mph winds & see how i fly right stall 60% of the time.That motor stops it means crash.A mono aint the same.
even when this plane is going fast & goes deadstick you aint gunna land it where you wont.turn the plane & she will drop out of the sky.
cg

I vote NO The WM Ultimate was one of the poorest ARFS I've put together and as stated above, it's a royal pita to assemble at the field. A 2 piece wing when wingspan is only 64" - what's up w/ that?

It took me the better part of one year to complete it so many we're the fixes I deemed necessary to make it airworthy. Ironic, 'cause I had a receiver failure early into the FIRST flight so never got to evaluate its flight characteristics.

I got the Great Planes Ultimate in replacement and, WHOA - what a diference!! It went together perfectly is a snap to assemble at the field and flies beautifully. Even if thew WM flies good (which it might), I still vote for the GP version - it's in a different league.

yeh the old one MAYBE not the new one.If you dont like the new one your a fussy guy so you dont count .
we need you to buy or waste your money on a new one .
cg

you guys crack me up!

Heres a good video of the 1st generation 27% ultimate. It's the same as the Aeroworks, which isnt available anymore.
Turn up the volume, for once theres good music!!

http://www.rcuvideos.com/view_video....0aac7261a8c1bd