R C Jack

Will an OS 1.20 limit me in anyway on the Showtime in terms of 3D capability?

Thanks for the help,

Jack

Barry Cazier

My Feedback: (17)

I flew mine with a mighty 110. It was adequate power, enough, maybe even nice. But not too much. I'm at 4800' elevation. If you are lower than that I think you should be ok, but I don't think the OS makes as much juice as the 110. If you are lower you should be barely able to do every thing. One of the highest horsepower requirements is inverted flat spins (pin wheels) and waterfalls. I could do both nicely with my Showtime.

Good luck.

Thanks
Barry

nitro wing

My Feedback: (1)

Run 30% nitro,it helps quite a bit and a good balanced prop.

huey-pilot

My Feedback: (17)

My YS 110 turns an APC 16x6 prop at 9300 on 20% and my OS FS-120 Surpass III with a pump turns 9000 with the same fuel and propeller.

hobbydude214

My Feedback: (13)

do you think a flat spin really takes that much power? maybe a water fall. but definately a hover, harrier, KE harrier would take more power right?

Barry Cazier

My Feedback: (17)

hobbydude214...

Depends on how you do them. If you just flat spin down at a slow rate then it doesn't take much power, but...if you do them like I like to (pinwheel) fast and furious...then they take all the power you got...and if you want a rising flat spin...Well, I don't think you could get enough power in the Showtime to do a rising flat spin. You need a lightweight plane with lots of power...UCD60, Mayhem 3D, or maybe a profile.

A rising flat spin takes a lot more power than a hover. So does a waterfall, KE harrier. A regular harrier takes very little power. Neither does your rolling maneuvers, like rolling harriers, rolling circles etc.

Good waterfalls and rising flat spins take the most power I believe.

One thing for sure...you won't do a rising flat spin with the OS120 4 stroke.

Thanks
Barry

MIXMASTER

My Feedback: (15)

My OS 1.20 swings Zinger 17X5 up to 9500 RPM max, I richen it down to 9200-9300 for hovering. If the ST comes out near 10lbs like mine did,I dont think the YS 110 or OS 1.20 would be enough for hovering.

MIXMASTER

My Feedback: (15)

I'm talking 2 stroke -AX .

hobbydude214

My Feedback: (13)

even to pin wheel as you say you would not need (power) rather speed of the prop. yes to do a rising flatspin it probably would take more power. but a waterfall does not necessairly need all that power it just needs the right plane to do it. often you need a plane with a short nose from the LE of the wing. yes it takes power but not more than a hover would. and a harrier takes maybe nearly as much power as a hover because no you;re not holding the plane totally by the pro but it is in a stall therefore adequate power is needed. an nor will you with a 150 4 stroke. but it wouuld be intresting to find out the auctual power needed for these manuvers

Barry Cazier

My Feedback: (17)

hobbydude214...

My personal experience with my Velox was when I had a Saito 125 in it, it would waterfall but not really crisp. I changed to a mighty 110 and bingo...waterfalls are perfect, right on the wing tube and fast. This is a HP maneuver. You need to be able to "whip" the tail up and over. That takes a lot of power. I can really tell a lot of difference when you have the extra power. Doesn't mean the plane doesn't make a lot of difference. My UCD does waterfalls about as good as anything. Maybe my Mayhem is a little better in that area. Certain both those do waterfalls better than the Showtime. But they don't KE as good as the Showtime. So the airplane does make some difference.

I can harrier at just above an idle with most of my planes. If I give it any more throttle it just goes into a hover. Most of my planes will hover at about 1/2 throttle. When I do a waterfall, or rising flat spin, I use everything I got.

Thanks
Barry

hobbydude214

My Feedback: (13)

right right makes sense

seanychen

My Feedback: (4)

Barry,

I traded my NIB Harrier 90 + used Funtana 40 for a newly built, never flown Showtime 4D 90. The builder had a Saito 125 in there, but I am thinking of putting my YS 110 (currently in my UCD60) or YS 120 (currently in my Zero) or OS 120 AX. The complicating factor is that the firewall and motor mount are drilled for Saito 125. And the screws that secure the motor mounts to the firewall are *permanently secured*. To get the 120 AX or YS 120 I would need to take out the Dremel and sacrifice the mount to get the screws out. It means I might have to deprive my UCD of the YS 110.

How much power margin does YS 110 on the Showtime? Mine weighs 5.5 lb. without engine & radio. When all is said and done, it will weigh 8.5 lb. Is that in the right ball park?

Kevin23

My Feedback: (4)

I have a 1.20 ax in my showtime and it is great,I am just learning 3d,but it hovers at about 1/4 throttle,and pulls verticle until it's out of sight.I'm very glad I chose this engine for this plane

Barry Cazier

My Feedback: (17)

seanychen...

The mighty 110 will fit right in with no mods. I think it's about 20% power difference. I'm at higher elevation and I could tell a big difference. But I think the YSs loose less as you go up in elevation because of the supercharger effect. I liked the Saito but I certainly feel the mighty 110 has more power. When I put it in the Velox, BIG difference.

I can turn a 16x6 about 9700 peak with the 110. I could only get about 9000 peak with the Saito. My Saito was brand new, 30 minutes run time, but I don't think there is any way it would ever spin the same RPM as the 110. At least not up here in thin air.

But man...disable a UCD, I don't know.

I had a Showtime with the 110. Mine weighed 8lbs 12ozs, (no wheel pants). I could never fully get used to it. I loved the way it flys in many ways, but it has an awkward tendency to "snap" at the most in oportune times. I never crashed it. I flew it about 50 times and couldn't ever get fully comfortable with it. I gave it away and bought a Velox from MaxAirRC. That plane flys much better in every way.

But my mighty 110 would hover the Showtime easily, did nice waterfalls, and did great flat spins (especially with the SFGs) I liked it, a lot, except for the one little snappy thing. It KE nice, just not as good as the Velox. Velox weighs 8lbs 9ozs. For me up here, it's about 9lbs for the maximum weight to be able to fly decent with the YS.

Hope that helps.\

thanks
Barry

IMK

Kevin23,

What muffler, prop and fuel were use using on your OS 120AX?

Thanks,
Iain

Kevin23

My Feedback: (4)

bisson pitts muffler,apc 16x8 prop and wildcat 10% fuel,originally run 15%,but another one of my engines didn't like the higher nitro so I changed to the 10%.
I could tell a little difference in power,but it still has way more than I could ever use in any manuever.

IMO,if you want to run a 2 stroke,this is the one for showtime

IMK

Thanks Kevin23,

What was the all up weight with your set-up?

Cheers,
Iain

Kevin23

My Feedback: (4)

not sure on the weight,I do have a postal scale,I'll try and get it weighed tonight and let you know

Darklotus

My Feedback: (4)

I have a Satio 125 with a few gallons of coolpower 30% through it, it turns a 16x8 APC at 9300 rpm. I'm flying at 6000 feet (Chatfield, Colorado)

Here is the post when I bought the motor and was running it in, with all my tach numbers for different props.

http://www.rcuniverse.com/forum/m_36...tm.htm#3678472

I didn't test an APC 16x8 at that time, but thats what I run in my H9 stang, and it hangs on the prop easy. I have a showtime I plan on putting it into once the stang dies.

bchoper

My Feedback: (19)

The man started the post asking about an OS 1.20, so why do all the YS 110 owners have to but in?!?!?!

RC Jack,

I have an OS 120 FS on mine but I have not flown it yet. I have read here on RCU that a Saito 100 will hover it but that's IT! So that is why a robbed one of my other planes of the 120. It's all set up and ready to go I just have not made it to the field (three kids). I have run it in the back yard with a 16x4W prop and I think it the motor will be more than enough for it!!!

crhammond

My Feedback: (21)

I just removed the MVVS 160 gasoline from mine and put in the OS120AX. The little gasser was good but the plane was quite heavy with it (large heavy pipe and very heavy engine+ignition) and without the SFG's the low speed handling was kinda scary.

End of season last year I saw one with a 120AX and it was just as fast and powerfull as the MVVS on a pipe without all the weight so it just plain flew better and was a rocket just like the gasser. I just installed my 120AX about 30 mins ago. Fits great. I used a beefy 4-stroke mount but you could use the stock one. I plan to use the stock muffler as it is quiet, good performance and with it out in the air stream it will help cool things. Runs great on 10% nitro too I'm told...

Before the MVVS I had one with a Saito 125 which was very dissappointing power-wise even on 30% Heli. Tons of torque but no speed and not unlimited vertical. I sold it off and got a fresh ST on sale

I also saw one with a Saito 180 and it had big power but not as much as you'd expect. The guy only flies 3D with it... it TR'd and did rolling harriers really well... but he was a great pilot - I think it was a bit of a handfull.

I plan to use mine for pattern practice - I think the 120 will be a good match for that with reasonable running costs. If I can find a pitts muffler that might be nice for the looks though and keeping the air flow cleaner

Riverdancer

My Feedback: (5)

Good Day RC Jack..

My son (Analog-boy) flys one with a Saito 180 and it works well but it's a bit on the heavy side.. I'm certain you will have a winner with the OS120AX as it will turn a 17x6 about the same as the 180 does.. and the overall weight will be down. It would be my choice for this airframe..

Enjoy and let us know how it works out.

Riverdancer