Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Jett 90L or YS 110FZ ?

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Old 11-06-2005, 10:25 PM
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Crazy4Flight
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Default Jett 90L or YS 110FZ ?

just for S&G I got a H-9 P40 Warhawk....

Now the choice is Jett 90L or YS 110FZ
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Old 11-06-2005, 10:29 PM
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Default RE: Jett 90L or YS 110FZ ?

better sound and speed from the 110
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Old 11-06-2005, 11:44 PM
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Default RE: Jett 90L or YS 110FZ ?

I second the YS ....[sm=thumbup.gif]

FBD.
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Old 11-07-2005, 02:32 AM
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Default RE: Jett 90L or YS 110FZ ?

For a warbird go the 4 stroke
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Old 11-07-2005, 11:24 AM
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Default RE: Jett 90L or YS 110FZ ?


ORIGINAL: Crazy4Flight

just for S&G I got a H-9 P40 Warhawk....

Now the choice is Jett 90L or YS 110FZ
Ok..... I will be the advocate here.....

SJ-90L or BSE-100 - turbo-jett muffler, 14x8 or 15x8 prop. Or try a 3-blade (the BSE-120 will work wonders too)

side mount the engine - the turbo-jett should fit entirely inside of the cowl (id have to go measure it)

You have that old big-block SJ-120 too (in the F-4 phantom?) , don't you ?? I'd try that too.

Performance is about a toss up - the YS110 performs about the same. (If you have one already)

Im sorta waiting to see this new Saito 120 too..... that looks like its going to be pretty slick.

Bob
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Old 11-07-2005, 01:13 PM
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js3
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Default RE: Jett 90L or YS 110FZ ?

Bob,

What's new about the Saito 1.2?
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Old 11-07-2005, 01:32 PM
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Default RE: Jett 90L or YS 110FZ ?

there is a new version about to hit the market. It will replace the Saito 100. Remains "60" sized. Looks like its got some serious muscle, and will compete with the YS110 for market share.
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Old 11-07-2005, 01:37 PM
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js3
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Default RE: Jett 90L or YS 110FZ ?

Cool. Thanks a lot. I've never been much of a 4c guy, but I like to know what's out there.
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Old 11-07-2005, 01:43 PM
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Default RE: Jett 90L or YS 110FZ ?

Yeah, im not much of a 4C guy either - but somehow I own a few

BTW.. I goofed... its a Saito 125

http://www.rcuniverse.com/forum/fb.asp?m=3475831
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Old 11-12-2005, 01:59 PM
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Default RE: Jett 90L or YS 110FZ ?

HAY FBD:

Please give me the real skinny here. A YS 110 equal to a Jett 90L or faster? I see the 110 in your dago red, nice instillaltion. Have a 110 rusting in a U can do and wonder if its worth the effort to try and go fast with. I am aware the Sacramento boys are flying war birds with the YS, but is this just a sound thing or will they truly scoot. Sosmeone there is apparently cutting foam race wings for their war birds which helps the speed a bunch. I am torn with spending time and effort in something that in my mind will never be fast enough for my overall needs. (Domination). Might as well be honest aobut it? There is also the mechanical side of the 4 storke in racilng, how they will hold up, or blow up. Don't want to go into motor modifications to make these things go fast.
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Old 11-12-2005, 07:37 PM
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Default RE: Jett 90L or YS 110FZ ?

I think that was a setup. I saw that and went "oh man, this will be good."
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Old 11-12-2005, 07:57 PM
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Crazy4Flight
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Default RE: Jett 90L or YS 110FZ ?

today friends and I flew an old battle tested Modeltech Magic funfly. Mike put an old enya 46 4C on my old magic which i gave to him, chris reset the enya's valve lash. I did a trim in flight on a windy day 10-15 gusting 25. we had a ton of fun with it until Mike drilled it.

that old 4C put some new life into the old bird.
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Old 11-13-2005, 03:31 AM
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Harry Lagman
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Default RE: Jett 90L or YS 110FZ ?

ORIGINAL: Crazy4Flight

just for S&G I got a H-9 P40 Warhawk....

Now the choice is Jett 90L or YS 110FZ
I've got both - a cast crankcase Jett .90L (not the LX) on a Jettstream Muffler and the YS 1.10. Using Pe Reivers' prop-power spreadsheet (good for power calcs but not so accurate for thrust) to work out the horsepower, the two engines are remarkably similar in output. The Jett does at least 13,000 with an APC 12x8 (2.36 hp) and 15,000 on an APC 11x7 (2.24 hp) (15% Nitro, 18% Coolpower pink) and for comparison, the YS does 9750 on an APC 14x10 (2.3 hp) and 10,700 on an APC 13x10 (2.26 hp) (20% Nitro/20% Coolpower Blue). Within their operating rev bands, both engines have quite linear power curves.

For outright speed or pylon racing performance, I'd say that for an application requiring a 13 or 14 inch prop (for example, a scale radial engined warbird), the YS will be superior. The Jett will be the engine of choice in an airframe where an 11 inch prop is sufficient in diameter.

FWIW, I don't think a Saito 1.25, as good as it might be, will quite compete with these two engines.
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Old 11-13-2005, 05:03 PM
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Default RE: Jett 90L or YS 110FZ ?

Good post Harry Lagman.

Usually anything that might require a 13" or bigger prop on it, Id throw at BSE-100 or BSE-120 at it. They like the bigger props.
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Old 11-13-2005, 09:19 PM
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rmenke
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Default RE: Jett 90L or YS 110FZ ?

Great, thanks Bob.

Now for the ultimate question (just gotta know). In your opinion, in a hopped up streemlined airframe like the GP Ultrasport (40), what big block would be the fastest around a pylon cource? What gives me the creeps is a GP Super Sportster 40 with a bay off each wing, retracts, fillets and great build has been giving everyone fits for the past several years. First powered by a ST 40 and then ST50 when the 40 wore out. The darn thing outruns Q-500's with sport engines in them. How can that be? A one time fluke. No, time after time after time. If he just kicked my old but once in a while, no issue just because the guy is a super race pilot. Fact is the thing is really fast. A super Sportster, you have got to be kidding. No, its a local legend. Now comes a additional problem. Local go faster guy older than I am and I have been here since dirt came out with a, you aint gonna believe this, a Aero Star, K & B 48 junk with Performance Muffler, cut down wing, streemlined and is giving me a very hard time against my Yellow Jacket, and nothing is as fast as my yellow jacket, period. (At least around here in the boonies) Ok, also a very good pilot, but much toooo close to my rear. Two for two the last race, he lost overall from a cut trying to steal one. Here is my thing. While racing, I can clearly see that white Aero Star on my but due to the overall size I think. My Yellow Jacket is much smaller and even though yellow, I can see the other plane much better, I think due to the size. Sooooooooooooo, I am up to the ususal no good, make a bigger badder racer that I can see, rather than a blur. No, not getting out turned, just almost outrun, and that is just not acceptable, at least not without a fight. Its really a old timmer against another old timmer, both with too much pride, way over the hill but still on top in a small local area. Good friends off the race track, almost into a fist fight on numerious occasions through the years. Help?
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Old 11-14-2005, 12:57 AM
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Default RE: Jett 90L or YS 110FZ ?

I hate to disagree with you guys but the Jett 90 has no business sitting in a WWII warbird. Jett 90 higher rpm sound belongs in a sleek airframe like the F16. Only 4C motors should be installed in the typical warbirds. I put a Saito 100 into my H-9 warhawk and the combo of power and sound from that Saito is just right. The warhawk is a pretty light airframe. Besides, swinging a big 14x10 prop on that warbird looks way better than 11 or 12 inch prop for Jett 90 option. Just my two cents...
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Old 11-14-2005, 08:57 AM
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Default RE: Jett 90L or YS 110FZ ?


ORIGINAL: kmtranmd

I hate to disagree with you guys but the Jett 90 has no business sitting in a WWII warbird. Jett 90 higher rpm sound belongs in a sleek airframe like the F16. Only 4C motors should be installed in the typical warbirds. I put a Saito 100 into my H-9 warhawk and the combo of power and sound from that Saito is just right. The warhawk is a pretty light airframe. Besides, swinging a big 14x10 prop on that warbird looks way better than 11 or 12 inch prop for Jett 90 option. Just my two cents...
No huge argument there Here is another penny for your collection..... O There is the right engine for every application. I guess since Ive been in the sport since before 4-C engines ran with any power, I tend to use what ever seems right for the job (or more like what ever I have on hand).

Although, the BSE-100 and 120 are better suited for warbirds and aerobatic planes, the SJ-90 has been in its share of scale planes over the years. A few flying in the H9 mustang and Miss A that I know of lately. A few in Corsairs. None in the P-40 so far that I know of. Quite a few in TF warbirds over the years. Combined with the turbo-jett muffler or the "T"orque jett-stream muffler, the 90L is pretty darn good swinging a 13" or 14" prop. Even looks nice in a round cowl (right Dave ? )
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Old 11-14-2005, 10:55 AM
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Default RE: Jett 90L or YS 110FZ ?

Yep, that be my Corsair, with Jett .90.

Only flown it a couple times, and I think the Jett makes a great sound, although I may be biased. I blew an aileron servo on it, and have been just to lazy to change it out.

Too much racing going on in these parts, and although quick (Probably a little over 100mph) the Corsair just ain't quick enough for me but does look nice going across the field nice and low with out board wing tilted up slightly.
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Old 11-18-2005, 06:57 PM
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Default RE: Jett 90L or YS 110FZ ?

Any problem over-revving those 4C engines? I had a ys 140 on a kangaroo and it threw a prop thru a fin and broke off the mount at high speed.
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Old 11-21-2005, 04:44 PM
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Default RE: Jett 90L or YS 110FZ ?

THAT is the catch 22 here......

The 2C engine does not have an rpm limit. The 4-C does. The YS is tough, but Id hate to see one try to turn 13,000 for long.

Prop either accordingly, and they can both run hard.
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Old 11-21-2005, 08:40 PM
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Default RE: Jett 90L or YS 110FZ ?


ORIGINAL: jlong34016

Any problem over-revving those 4C engines? I had a ys 140 on a kangaroo and it threw a prop thru a fin and broke off the mount at high speed.

the four stroke on my Roo is a suck squeeze burn and blow type RPM limit 128,000.
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