Playfair

My Feedback: (5)

Hey guys! I have a question I was hoping someone could help with...

I have the oportunity to pickup a pretty good condition Funtana 90S with a YS140 with older Hitec digitals.
The guy wants $350.
I'm not sure how good a deal this is for an out of production plane, but as I'm going through it I found that the cowl is pretty beat. Can't find any online!

Has anyone tried fitting the 100x cowl to the 90? If all it would take is a shot of yellow paint, then I'm fine with that!

Thanks!

Zeeb

My Feedback: (41)

Well a couple of thoughts for you;

YS engines are not for the feint of heart. They really do run well when setup properly and taken care of with a taste for 30% nitro fuel if you want 'em to really run and idle well. This is because they are high performance engines and so they are a lot more sensitive to tuning than say an OS or something, that also means they can be easily damaged by running them too lean or letting them run out of fuel in flight can cause problems due to detonation.

If you've never used YS engines or don't have access to someone who can help you determine the shape the engine is in, that'd be a deal breaker IMHO.

Next point, and it probably doesn't apply if it's been flying with a 140 size engine, is to verify it's the later model with two ribs in the wings at the aileron servo location. The original versions only had one rib and there were issues with flutter and wing failures. Horizon never admitted there was a problem, but the later models came out with two ribs at that location and the servo mounted in a box formed by those two ribs. DON'T buy one with the single wing rib at the aileron servo mount location.

I can't say for sure about the cowel fitting. Mike McConville said that the primary difference in the F90 and the 100X was the wing, it is no longer a constant camber from root to tip. This along with the SFG's was supposed to improve the flight performance in several areas. The 100X also has some carbon components that the F90 did not. That being said, one would think the cowl is the same, but I can't confirm that. If someone here can't answer your question, you might post the question over on Mike's support forum.

JMHO, YMMV....

opjose

The Funtana 100X's cowl is the wrong size.

I love my Funtana 90S and I fly it with a reliable Saito 1.00 using an APC 16x4W prop which gives it plenty of power but slow flight speeds.

The YS140 is likely to overspeed the Funtana unless you use a similiar low pitch prop, in which case the YS is overkill on the Funtana...

Zeeb

My Feedback: (41)

Opjose,

Thanks for the heads up on the cowl, I don't need one right now but I keep my eye open for stuff like that so I won't consider the 100X cowl should I need one.

I guess I should qualify my comments above by saying that I do still have a Funtana 90 and it's got a YS-110 on it for our altitude here at 4500' ASL. It's a great engine for that model and our desity altitude but there were several club members here who bought YS engines after seeing mine run and they've all gotten rid of them since they grew frustrated with setting them up.

He's also right about the 140 being LOTS of engine for the Funtana and will require some significant throttle management, but I've seen the model with Saito 150's too so there have been guys putting monster engines on 'em. Not my bag, but whatever trips your trigger I guess....

Playfair

My Feedback: (5)

Thanks guys!
This plane does have the single rib along the ail servos, with cross pieces where the servo mounts connecting it to another rib several inches away. I could see how this area could be weak causing flutter...

I did test fly the plane, and the engine seemed to run fine. The tail fluttered, but I later found a loose servo horn on rudder.

Guess I'll see if I can get him lower, or pass on the deal.

opjose

The Funtana S90 seems to do it's best and safest flying at slow speeds.

It was never designed for high speeds.

I had an overly powerful engine on mine at one point, and I noticed elevator flutter in straight passes.

I've been much happier with this plane once I put in the Saito 1.00 with the 16x4W prop which the instructions recommend.

I could see a YS110 also being a great match as well... the YS110 and YS140 are both supercharged, so they produce far more power than my Saito.

I can't imagine flying the YS140 at denser air levels though... a bit too much pitch and you are likely to loose the plane in a dive.

I'd imagine that at higher elevations though it would be a great pairing.

skyriter

I have an OS120 FS pumped on my Funtana with 16 - 4W and most of the time I am flying at 1/2 throttle. I fly mostly IMAC and no 3-D, so not sure if it would have enough power to hover or not. Veritcal is good - not unlimited, but good.

Bruce

jb86

My Feedback: (8)

wrong prop.

i have a funtana 90, haven't flown in a couple of years. i oringially set up a/120FS III pumped and 16x4w. as engine broke in, RPM went from 9400 - 9900. it had plenty of power, but not enough bite in the prop to hang. it was REALLY slow. also the a/c was too heavy - misc. equipment and the 36oz eninge.

i think a 16x6 would get the rpm about right and give some more bite. also, the ys 110 calls for a 16x6, but apc has a 16.5x5 that is recommended for it. may be a good choice. the 16x4W just isn't enough i think for that engine.

the os 120 FS is really too heavy for the power output. i used it because of the ease of operation, can't beat an OS.

i just bought a new ys 110 FS-z. runs a couple hundred more RPM's than the old 110. no timie to fly any time soon. i live in downtown washington, no where of much value to fly near here. if i didn't have a really good job that i like, i'd be gone in a minute.
jon

Zeeb

My Feedback: (41)

Well I tried the 16x4W and it wasn't enough prop for the little YS-110, spun that sucker over 10,000 RPM without even being broken in....

So I went to the 16x6 APC and it's been a great prop for me, spins in the 9500 RPM range and with my Funtana weighing in at about 8 3/4lbs. it does really well up here.

I wanted to try that APC 16.5x5 but was never able to find one. Tower had 'em listed, but always showing backordered. I never saw one anywhere else and by the time I might have really pursued it, I'd pretty much moved on to the gassers. IIRC, the last time I was on Tower's site, that prop wasn't even listed anymore, but then I don't get on Tower's website much anymore.

As for the new YS-110, yeah the gurus say it's supposed to turn several hundred more RPM, but I think they are kind of sticking to theire guns about keeping the engine in the mid-nines, or at least no slower than 9000 nor over 10,000, so I'm not sure what the best prop would be for you, but give the 16x6 a shot.

skyriter

Yes I agree - too heavy engine.. but this is what I had.

With 16-4W was in the 9400-9600 range and since I am not into 3D, this did not over-speed the airframe. I have the 1st verison with just 1 rib by the aileron servo, but I did remove the covering and re-enforce the ribs etc before the 1st flight.

Bruce

joshman123

what prop should i run on my os 108 fsr on the funtana?

fredmcl2

Hi, just got a used Funtana 90 and am setting it up. Need to decide whether to go with an OS 1.20 fs or an OS 1.20 2-stroke, since I already have those.

Does anyone know where an owner's manual can be found on-line or here in RC Universe?

Thanks. Fred in Maryland

opjose

Re: Manual

[link=http://www.horizonhobby.com/ProdInfo/Files/han2675-manual.pdf]Funtana 90 Manual Click me![/link]

The 1.20 Four Stroke should be perfect.

jb86

My Feedback: (8)

i posted earlier - the OS 120FS is too heavy for the power output, IMHO. however, i used a 16x4W turning 9900rpm. a 16x6 may have bite more. the 16X4W was really slow too, not just a little. for sure the 120AX, from what i have heard has plenty of power. i discourage the 120FS, just too darn heavy. some day, when my job doesn't take every bit of my time, i look forward to flying mine again, the YS110FZ-S will be sweet.
jon

RCAA

My Feedback: (4)

IMHO jb is right. I fly my Funtana with a YS110 and it is perfect. Does anything and everything you would want it to do and are capable of doing. I use an APC 16x6 prop and have flown it for two years now and wouldn't change a thing. The four stroke 120 is just tooooooo much and the 100 is NOT enough. [8D]

opjose

I disagree.

The difference in weight between the OS 1.20 and your engine is about 4-5 oz all told which is not going to make much of a difference on the Funtana s90.

Your engine DOES produce more power however which is always a good thing.

I flew mine with a 16x8 APC while testing ( no cowl ) and then I switched it to a Saito 1.00 with the 16x4w prop as recommended.

I was afraid of overspeeding the plane as I could hear harmonic vibration as it flew by with the 1.20 FS so I took it back down.

It does fly SLOW with the Saito 1.00, but that is as it was designed to fly. I have NO danger of overspeeding the plane, nor of flutter as reported by people that really go nuts on the power output.

My takeoffs are straight up, and if I could hold the plane, I could easily hand launch it.


I did not find this so... though I fly at low altitude ( approx 200-300ft ) so take that with a grain of salt...

With the O.S. 1.20 I moved the battery pack back into the fuse.

With the Saito I had to move the battery pack forward into the cowl and the plane ended up still being too tail heavy.

bozxky

guys, what's the prop size for the OS 120 AX (2 stroke engine)? i tried using APC 15x6 using 15%nitro, but its a bit too fast for me. I heard people using APC 16x4W, is it the right setup? i mean to hover and pull up without the engine screaming hard on that prop size? anyone tried this setup before? any other suggestion ?

I saw people using 16x4W on Saito 100, how about on OS 120 AX ?

tIANci

I flew my F90 with a YS110 and a 16x6, the prop was just nice for me. I did not find a 6" pitch prop to be too fast for the plane. I prefer the F90 with a 6" pitch prop and not with a 4W prop. The 16x6 gives better bite ...

For an OS 120AX you can use a 16x6, my TT120 was turning a 16x6 with ease. Also, over speeding or not is about throttle management, that's all. I have seen my friend fly his F90 on an OS120 FS and it was fine, he was happily hanging her and pulling out with authority. Who says the 120 FS is not suitable? :P

bozxky

are you sure 16x6 on OS 120 AX ? because OS 120 AX produce 3.1 HP@9000 rpm and for OS 120 FS only 2.1HP@12000 rpm.

Ron McGrath

My Feedback: (10)

A 16x6 was a great prop for a os 108 2 cycle

tIANci

Try this ... [link=http://www.rcuniverse.com/forum/m_3998256/tm.htm]OS 120 AX tach readings[/link]

rudderfeet

My Feedback: (7)

I just picked up an expertly built and never flown Funtana S90 with Saito 100 on it.  What a gorgeous plane - it's all I can do to slow down and take my time transitioning from 40" electric 3D planes.

opjose

Put a 16x4W pitch prop in that plane.

It is meant to be flown SLOOOOWLY.

The 4W will give it unlimited verticals and plenty of power to pull out of hovers.

My take offs with that plane are straight up after a roll of 10-20 feet to make the tail effective.

The 6 pitch props wil not necessarily overspeed the plane, but you are sacrificing pulling power on the Saito 1.00 ( which is what I use ) by going with it.

The new Funtanas are almost the same exact size as the 90, but they now recommend the 1.25 engine instead.

ZachB10

My Feedback: (9)

I just picked up a Funtana 90 not too long ago, and it's a great plane but would like to pick up a new set of main gear for it - the plane sits very low to the ground and the prop clearance makes me nervous.  What would be recommended for a good set of replacement gear?  I like the carbon fiber look but want to make sure I use a replacement that absorbs enough impact so as to not damage the fuse.  Thanks in advance!

Zeeb

My Feedback: (41)

I looked at the same question/issue with my '90 when I got it and after reading much of this thread, I decided something else was in order for the landing gear.

Question then becomes; aluminum or carbon fiber? Let me say I'm not really a fan of carbon fiber gear as most are not much lighter if any than aluminum and when side loaded they make the model hop down the runway, especially if one might be trying to do some S-turns to help slow down. They are also prone to delaminating. This is not to say I don't have models with carbon fiber gear, but that's only because they came with it and it's really spendy to replace gear on the models I'm flying now like the Comp-Arf in my avatar.

There are a couple of sources but I like TNT and they'll have either aluminum or carbon fiber for most models. For my Funtana, I got one that is T-6061 aluminum, two inches taller, two inches wider and 3/16" thick instead of the factory 1/8" thickness. You can get the 1/8" or 3/16" from TNT and I don't remember if there are other dimension differences available nor what the specs are on the carbon fiber since I didn't even look for that to fit the Funtana 90.

http://www.tntlandinggear.com/

Hope that helps....