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YS 1.10 vs. O.S. .91fx for Funtana 90s?

Old 12-22-2004, 12:17 PM
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Default YS 1.10 vs. O.S. .91fx for Funtana 90s?

First I would just like to say hello and how much I appreciate the info I have found from you all here at rcuniverse! I would also like to let you know the 'SAD' in SADmember is not sad, boo hoo, but SAD as in "Society of Aircraft Demolishers". Now on to my big question.
I have just recently purchased and built the Funtana 90S arf from Hangar 9. This will be my first 3-d plane and I have now started my big engine search. My local hobby shop here in Montana recomended the O.S. .91fx for a good motor....however the more I look into the subject of good engines for the Funtana I have seen just about every combo out there with the YS 1.10 being the predominant motor for this plane. The cost and availabilty of the YS make it hard for me to settle on however. At 329.99 plus 100.00usd for the pitts style muffler we are getting a little rich.
So my questions to all you out there with a better wealth of knowledge than what I am woking with is this: Would I be happy with an O.S. .91fx at just over 4,000ft above sea level vs the YS 1.10? Will the .91 hover this plane or is it just too little power? Would this be a good first motor for the plane as a new 3-d enthusiast or is it better to start out of the gate with a good power house? Remember too I'm dipping into savings and would also like to save a little if possible.
Thanks again for all the info I have already gathered!!
Old 12-22-2004, 04:45 PM
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tukkus
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I think you'll be happier with the Y.S. engine because of the extra power you'll need at your altitude and i'm not sure if you need a pitts muffler for the Funtana but if you don't need it then don't bother buying it, i'm sure you'll be happy with the stock.

I've seen a Funtana with the y.s.110 and i know it's a great combo but i'm not sure about the o.s.91, to me the .91 just barely meets the requirements where as the 1.10 will be better suited to give you the thrills you're looking for.

Good luck : )
Old 12-22-2004, 05:14 PM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I have the YS .63 in my funtana .40 and the stock muffler exits the vent hole I made in the bottom of the cowl. It should be the same on the larger Funtana. Go with the YS 1.10 and you won't regret it.
Old 12-22-2004, 05:21 PM
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fox35
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I have a YS 110 in a Dave Patrick Ultimate which weighs 11lb-6oz. It hovers this plane. I run it with no muffler. And with 30% nitro heli fuel, which is expensive.

I've had quite a few plugs burn out, and I've found the engine finicky to set up. Quite a few deadsticks. This has been my first and only YS, so maybe my problems are due to lack of experience.

If I had it to do over again, I'd go with a Saito 100 with a Cline regulator and 15% Cool Power.
Old 12-22-2004, 05:54 PM
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Shahid
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I have seen a YS 110 powered funatan 90, one word, NUTS
Old 12-22-2004, 08:31 PM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Does this mean you think a OS .91FX is a better choice?? I sure don't think so. For me there is nothing better then YS especially for 3d.

If fox35 can't get his YS 110 running right then try the YS forum. If that does not work send it to YS their service is great.
ORIGINAL: Shahid

I have seen a YS 110 powered funatan 90, one word, NUTS
Old 12-22-2004, 08:35 PM
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YS-I-DO
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Fox 35, put the muffler back on! That's your problem!
Old 12-22-2004, 09:21 PM
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DrFun
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I have Funatana 90 with O.S. 91FX Slimline and perry pump 15x4APC CF gear and weight saving measures, I am going to put a Y.S. 1.10 once they are available, 91FX is marginal it can hover but the pull is not good.

Weight no issue as even tough I moved the rudder under canopy I needed to put 6 oz up front, so save yourself trouble and get the ys 1.10, the video's of it I have seen is nothing like 91fx.

The price of muffler pump and O.S. 91FX is $280 close to YS 1.10 the only reason I put 91FX is I had NIB, which is a preety good reason but 91FX has a suitable home.
Old 12-25-2004, 01:37 PM
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lynnpreston
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

For the money, I would opt for the Saito 150 or Saito 180. Nominal weight increase and much more power. You can never go wrong opting for more power. You can't beat the power-to-weight ratio of the Saito's.
Old 12-25-2004, 04:56 PM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I have both the Saito-91 and a YS-63 (old version). And the YS will spin the same prop (12X8) only 200 RPM slower. So the YS-110 will be heads and tails above the Saito. Another advantage of the YS is since the fuel tank pressure is around 8psi (use seamless tanks), you can put the tank over the CG point on the plane and it's flight characteristics will not change with the consumption of fuel. Now with that said, if you have not owned a YS be careful, they tune differently than a standard nitro motor. The high speed is the same for rich/lean, but the low speed is an air-bleed setup. So CCW is lean and CW on the LS is richer. You also have a diaphragm pressure setting that can affect the overall operation. Takes a little getting used to, but in my opinion and many others, once you go YS, you don't go back. Unless your wallet says otherwise.

Mike
Old 12-25-2004, 08:32 PM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

YS. See Kyle's video in the 3D forum with a YS 120 in a funtana 90, you won't have any more questions. The pump is a huge benefit for 3D. A dead stick with the wing already stalled is a bad thing. Nothing runs like a YS.
Dave
Old 12-25-2004, 08:48 PM
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David Cutler
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Um, a Saito 180 in a Funtana 90?

Don't you think that's little too overpowered? I doubt if the Funtana is built strong enough to be able to use the extra power.

[8D]
Old 12-26-2004, 12:01 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Believe it or not this is one of the best engines to run in that ARF. It balances perfectly and the plane can handle it. Plenty of people in this forum have that setup. You have to be smart on the throttle as always on an over powered plane but from what I hear it runs great. I sold my Saito 180 to a guy on this from (3de?) and he loves it. Of course he flies at 4000-5000 feet but still many people fly at near sea level with that engine.

ORIGINAL: David Cutler

Um, a Saito 180 in a Funtana 90?

Don't you think that's little too overpowered? I doubt if the Funtana is built strong enough to be able to use the extra power.

[8D]
Old 12-26-2004, 12:05 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I am going to buy a Saito 180 on Wednesday for my Funtana S90..I know that the box calls for up to a 100 4 Stroke..But if you study all the engines. And look at the balance to weight ratio..You can clearly see that the 180 Saito will be just fine..The video of Kyle flying his S90 is great..What he did was add 3 oz of lead (dead) weight to the front with his YS 120 to make it balance out right..The decision is do you want to go with a Saito 180 or equivalent and have the same weight without adding lead weight..If anyone has any input for me please let me know..Thanks..Brandon in FL
Old 12-26-2004, 12:08 AM
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David Cutler
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Interesting.

I know the Saito 180 is about as good an engine as it's possible to get, with smooth stump pulling power, but as I say, it's interesting to hear the Funtana can handle the phenomenal torque at low revs, and hence the torsional vibration it creates. What prop size do you use?

-David C.
Old 12-26-2004, 01:16 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Like I said many have tried it and no problems at all. Use an APC 18-6W. You might want a little taller gear that's about all. You could treat the firewall area to thin CA as in all ARFs and that would add plenty of strength.

ORIGINAL: David Cutler

Interesting.

I know the Saito 180 is about as good an engine as it's possible to get, with smooth stump pulling power, but as I say, it's interesting to hear the Funtana can handle the phenomenal torque at low revs, and hence the torsional vibration it creates. What prop size do you use?

-David C.
Old 12-26-2004, 10:47 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

If Kyle had to add 3oz of weight with a YS-120 then you would have to do the same with the Saito 180 considering the Saito weighs 31oz and the YS weighs 31.2oz. It also has to do with preference, some like it nose heavy for landing, and some like it tail heavy for "hanging" on the prop. Besides, he was probably still within the CG range with or without the 3oz. As for "dead" weight, any weight is dead weight in an airplane. The YS will let you move your gas tank anywhere you want it to control balance, where as with the Saito it needs to be behind the firewall. Here is some other specs to compare. YS RPM 2,000-12,500, Saito-2,000-10,000. YS-16X8 prop @ 10,500, Saito 16X8 prop 9,400. YS pressurized fuel system won't lean when hanging or richen in nose dive, Saito exhaust pressure nuf said. Please keep in mind these are not my personal specs, but what I've been able to get from many searches on the net from companies and personal testimony. From personal experience with both a Saito and YS, the YS definitely has a quicker throttle response. Saito is a lot easier to tune and is maint free once properly broken-in which is why alot of people like them. I've found many people are not mechanically inclined and a YS does require you to keep on top of it. Which is why I get such great deals on "barely" used YS engines, they just can't get the hang of tunning them.

Mike
Old 12-27-2004, 12:00 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

ORIGINAL: powertoys

If Kyle had to add 3oz of weight with a YS-120 then you would have to do the same with the Saito 180 considering the Saito weighs 31oz and the YS weighs 31.2oz.
No the Saito 180 weighs exactly 34 ounces with muffler. I weighed it with a very accurate digital scale. Like I said it balances perfectly.
Old 12-27-2004, 02:13 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I am in the same fix... a new F90 and selecting a power plant. I am strongly leaning towards the Saito 150. Price/weight/performance all look right for me. At my low altitude, this thing outta rock. I have the following questions for the experienced out there :

Given the following...
Saito 120 = 2.2 HP @ $330
Saito 150 = 2.5 HP @ $370
Saito 180 = 2.8 HP @ $400

a. The Saito 150 is a punched out 120... will it have a shortened life or overheating problems?
b. Is the 14% increase in power worth the extra $40.
c. Will it fit without major cutting?
d. Should it, or will it need to be, mounted inverted?
d. What are the rules for cooling vents on coweled engines?


BTW: If you haven't seen it yet, Kyle is a bad-ass kid flying an F90 here [>:]:
http://www.rcuniverse.com/forum/m_24...tm.htm#2453351
This kid is like 15 years old and has been flying for less than two years... amazing! Look out big-boys... he's gonna kick you butts one day[sm=punching.gif]!
Old 12-28-2004, 06:30 PM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

you might consider a satio 100..it's a great combo and gives alot of thrust for 3d if thats where you are at..if its just fun flying and basic aerobatics use your 91 or possibly an evolution 100..Its a fabulous plane..
Old 01-05-2005, 12:53 AM
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DTB
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Definately go with the YS 1.10FZ. I have a 1.10FZ on my FT90 spinning a APC 16x4 at 10,300. I actually flew my buds FT90 again today with a Satio 100 and was once again disappointed. Hovering is capable with a 15x4W on the 100, but only at WOT. The performance really lacks compared to the 1.10FZ. The Saito 1.20 would be a better choice, but still not comparable to the YS. The Saito 1.50 is a better choice if you are comparing the YS 1.10 and a Saito. Forget about 2 strokes for 3D. You'll be more happy with the 4-stroke torque.

Just my opinion,
DTB
Old 01-05-2005, 01:47 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

I agree ..Go with the YS ...I have 2ea OS91fx and 3ea ys 110fz at sea level the ys kicks the but off the 91..the ys will spin a 17x4w APC Easy... The 91 wont....JW
ORIGINAL: DTB

Definately go with the YS 1.10FZ. I have a 1.10FZ on my FT90 spinning a APC 16x4 at 10,300. I actually flew my buds FT90 again today with a Satio 100 and was once again disappointed. Hovering is capable with a 15x4W on the 100, but only at WOT. The performance really lacks compared to the 1.10FZ. The Saito 1.20 would be a better choice, but still not comparable to the YS. The Saito 1.50 is a better choice if you are comparing the YS 1.10 and a Saito. Forget about 2 strokes for 3D. You'll be more happy with the 4-stroke torque.

Just my opinion,
DTB
Old 01-05-2005, 01:55 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

The 91FX is so much better for it. I've seen some fly with this engine and it kicks, While the YS maybe has more power, it's way heavier. 91 keeps it light and performance full. You wont regret it
Old 01-05-2005, 09:09 AM
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C140 Brothers
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Shahid where did you see this YS 110 powered Funtana 90?




Adam
Old 01-05-2005, 09:44 AM
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Default RE: YS 1.10 vs. O.S. .91fx for Funtana 90s?

Another advantage of the YS is since the fuel tank pressure is around 8psi (use seamless tanks), ( i forgot to click the quote icon).


so ys engines pressurize the tankto 8lbs? is this with just exaust pressure? i thought they used a pump? just trying to learn all i can cause i plan on my nelt engine being a ys. thanks!!

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