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

kyosho Kelly F-1

Old 04-25-2008, 10:12 PM
  #251  
kochj
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Default RE: kyosho Kelly F-1

They seem to being good job at it....
I think that It would be a nitche that not many explored... H9 did it with the sundowner....\
It is a big difference though in price and everything else.... Right now there is a Electric explosion...
Everyone wants in on it including kyosho. The giant scale stuff is more in the more involved, expensive, less sales per volume
compared to there other stock of planes..... Would be nice, but I think it is pipe dreams for now....
Then again, few years back only a select few had 100cc ARF/QB planes, now everyone is making them and they are mostly very good
quality, great flying planes....
Old 06-04-2008, 10:10 PM
  #252  
jbracing
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Default RE: kyosho Kelly F-1

Finally got the Kelly in the air tonight, Os 70 Heli with a Jet tuned muffler, 10x6 APC @13400 rich.
No lead required. No trim on elevator and a few on the ailerons .

Nice handling / tracking plane and almost a 3point on landing, but not yet impressed on the speed.

Will try a 11x8 next and a little leaning out.

BTW that pipe and extension fit PERFECT! Thanks again for all your guys help.

Old 06-05-2008, 04:54 AM
  #253  
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Default RE: kyosho Kelly F-1

H-9 Sundowner 50 or the Kyosho Kelly F-1?
Old 06-05-2008, 10:10 AM
  #254  
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Default RE: kyosho Kelly F-1


ORIGINAL: panzerd18

H-9 Sundowner 50 or the Kyosho Kelly F-1?

The Kelly F-1


If you are not impressed with the speed, it is time to tweek on your power plant a bit
Old 06-06-2008, 06:10 PM
  #255  
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Default RE: kyosho Kelly F-1

I've had mine in the box for a year now [&:] Time to take that thing out and start building!
Old 06-18-2008, 08:37 PM
  #256  
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Default RE: kyosho Kelly F-1

Not sure if this thread is still alive, but.... I just bought one of these Kelly's. Should be here tomorrow. I recently completed a Cermark Sukhoi with a 26cc gas engine. I enjoy it, but it just isn't fast enough. So, I have had my eye on this plane for a few weeks. Smaller and hopefully faster. I've read through all of the threads and it sounds like the YS 110 is the engine of choice. However, I am going to use an engine that I already have to save cash. I have a Saito 91 4 stroke or an OS 108 BX-1 2 stroke to choose from. Based on how I have seen these two perform in a Tiger Moth I have, I'm going with the OS 108 it pulls this big thing verticle. I want this thing to go fast. I read that there was someone talking of putting in a 1.2 OS 2 stoke. Curious if anyone did actually put one of these larger 2 stokes in.

I guess I'll know tomorrow, but wondering if this OS will fit without eating up too much cowling.

Old 06-20-2008, 12:17 AM
  #257  
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Default RE: kyosho Kelly F-1

Mine veers to the right when pulling up into a loop. Must be that excessive right thrust? With that much fin area below the fuse I wonder if right thrust is needed at all.
Old 06-25-2008, 12:11 AM
  #258  
rompusflyer
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Default RE: kyosho Kelly F-1

Well even though no one appears to be looking at this thread... had to update on my first flight today. I installed the OS 1.08 in this thing an balanced it out (CG). Man it took off like a rocket. 15 seconds into it as I was turning downwind, I just could not keep the wings level. I got it down on the ground but it was going so fast it nailed a cedar bush and trashed the main wings. No one was at the field to witness it. I had to laugh. It was so fast and furious and all the time I spent building it just flew away in less than half a minute. Now trying to find replacement wings. I think my problem was that I put weights on the left wing to compensate for the engine and muffler hanging out the right side. Probably too much weight on the left wing caused it to toss left and right. Also this engine is likely way to big for it. I'm so tempted to try it again with this engine; maybe I should just install the .90 4 stroke Saito I have laying around instead.
Old 08-05-2008, 06:15 PM
  #259  
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Default RE: kyosho Kelly F-1

Any new info on the Kelly F-1.......

Whats the largest engine that will go in and did anyone ever get a Jett 90 in it ? or maybe a YS140?

How much better is it than the Sundowner?

Richard
Old 08-05-2008, 09:24 PM
  #260  
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Default RE: kyosho Kelly F-1

I have seen a YS-120 stuffed into one of these......

IF you set this airplane up correctly, it will fly like it is on rails...
Old 08-07-2008, 12:18 AM
  #261  
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Default RE: kyosho Kelly F-1

I cut gill-like grills in the cowl for cooling. It's a row of straight cut ironed in much like what you see on a sports car.[8D]
Old 08-08-2008, 03:25 AM
  #262  
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Default RE: kyosho Kelly F-1

My friend built his Kelly now. He installed a new OS 55AX, that I still had lying around.
Mine is still equipped witht the JETT.
I must say: mine's much faster.
But anyhow: IMHO this modell must be driven by a two-stroke engine! As much as I love four-stroke engines - with this model its different. A two-stroke just sounds "faster", more aggressive. And I am driving a 10x10 prop at 15.000 rpm. That's 140 mph of prop wash. With a typical four stroke, turning at 10.000 rpm you need a pitch of 15 inch to get the same kind of speed. And where can you find a 10x15 prop?

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Old 08-08-2008, 07:35 AM
  #263  
RocketRob
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Default RE: kyosho Kelly F-1

Beautiful photos! And airplanes[8D]

I need to get busy on mine also.
Old 08-08-2008, 10:10 AM
  #264  
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Default RE: kyosho Kelly F-1

Spuetz...

Its good to see two of those on the flight line

If you get a chance.... can you give me the measurement of your resulting pipe setup on the SJ-60L engine? Center line length from the plug to the divergent high point on the pipe. I want to make sure I have it recored correctly.

Also, the intent was to get the system quiet, and fast. How did you do sound wise with the 10x10 at 15K rpm ?

Bob
Old 08-09-2008, 07:35 AM
  #265  
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Default RE: kyosho Kelly F-1

Hello Bob,

well, yes, it is quiet enough. about 82 Dba. Not exactly "quiet" yet, but sufficient to get the "ticket". And then again, I wouldn't want it quieter...

Will measure the lenght. What or where exactly is the "divergent high point"?

Thank you,

Martin
Old 08-09-2008, 02:51 PM
  #266  
I-Love-Jets
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Default RE: kyosho Kelly F-1

ORIGINAL: Spuetz

Will measure the lenght. What or where exactly is the "divergent high point"?
Hallo Spuetz,

er meint zum einen
[ul][*] den Abstand von der Kerze zur Prallplatte des Resorohres und zum anderen[*] den Abstand von der Kerze zur Mitte des Bauches im Falle eines Rohres mit Gegenkonus (Divergenz/Konvergenz).
[/ul]
In zweitem Fall wird nämlich die Resonanzwelle zu Beginn des konvergenten Konus (= Gegenkonus) wieder reflektiert.

Ich vermute jedoch in Deinem Fall ein Rohr mit Prallplatte. Zu messen ist stets entlang der Mittenlinie (centerline) von Krümmer und Reso, damit die Resolänge genau ermittelt werden kann.

P.S. The Kelly F-1 fuselage as well as the wing thickness will be too draggy for a 10x15 prop size combined with a suitable 4-stroker => this combo would be too inefficient and will not nearly achieve same top speed as your current JETT .60 LX + 10x10“ setup.

P.P.S Why didn’t you mount a JETT .60 LX FIRE engine with a fully integrated tuned pipe?
Old 08-09-2008, 04:39 PM
  #267  
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Default RE: kyosho Kelly F-1

hello Jetlover

thanks for the clarification.

Well I did not mount the fully integrated version because of noise. We have to stay below 82 dB at our field, measured at a 25 metres distance, thanks to "friendly" neighbours who like to call the "noise police". The original short tuned pipe that had the engine spinning close to 18.000 rpm was just too loud...
I am aware of the fact that this kind of spoiled the whole idea of the Jett engine but what can you do in an over-regulated Germany?

As for the drag, well I guess there is a limit to the speed of that model anyhow....
Old 08-10-2008, 05:30 AM
  #268  
I-Love-Jets
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Default RE: kyosho Kelly F-1

@ Spuetz

I think that was a misunderstanding.

I meant the position of the exhaust and the pipe being completely within the Kelly F1 fuselage.

There will be plenty of space for mounting any kind of 10 cc pipe, e.g.
[ul][*] Quiet muffled pipe: MACS # 1060[*] Muffled tuned pipe: MACS # 1260[*] Non-muffled tuned pipe: MACS # 1160[*] Muffled tuned pipe: MERKER # 06130[*] Quiet muffled pipe: MERKER # 06132
[/ul]
[link]http://www.macspro.com/tunedpipes.asp[/link]
[link]http://www.merker-modellbau.de/Resonanzschalldaempfer.htm[/link]


within the Kelly fuse, especially if the engine does feature a rear exhaust (FIRE or RIRE) configuration.

A Kelly F-1 characterised by a fully integrated exhaust system not only is better looking, but also will be faster due to considerably reduced parasitic drag. [sm=wink_smile.gif]



Old 08-10-2008, 10:42 AM
  #269  
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Default RE: kyosho Kelly F-1


ORIGINAL: Spuetz

Hello Bob,

well, yes, it is quiet enough. about 82 Dba. Not exactly "quiet" yet, but sufficient to get the "ticket". And then again, I wouldn't want it quieter...

Will measure the lenght. What or where exactly is the "divergent high point"?

Thank you,

Martin
point at which the pipe stops expanding in diameter and transitions to the cylindrical chamber section
Old 08-12-2008, 08:37 AM
  #270  
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Default RE: kyosho Kelly F-1

Hello guys,

A friend of mine wants to build one with an AX 75 motor, since he has that at home.

any tips on this setup ?
Old 08-12-2008, 09:33 AM
  #271  
Bill Vargas
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Default RE: kyosho Kelly F-1

Back to the plane,,, is it worth it?


BV
Old 08-13-2008, 10:32 AM
  #272  
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Default RE: kyosho Kelly F-1

love the look of it but forget about extreme speed
Old 08-13-2008, 11:28 AM
  #273  
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Default RE: kyosho Kelly F-1


ORIGINAL: ClemenTang

love the look of it but forget about extreme speed

Just to get a reference what will be "extreme speed" ???
Old 08-13-2008, 01:41 PM
  #274  
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Default RE: kyosho Kelly F-1

MarkF had one with a Neu motor in it and it was definitely extreme speed. It may have more drag than some other planes, but with the right power it will get with the program.

Blessings, Terry
Old 08-13-2008, 02:25 PM
  #275  
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Default RE: kyosho Kelly F-1

ORIGINAL: SpeedBoy

Just to get a reference what will be "extreme speed" ???
Well this is quite difficult to determine as this a pure subjective approach.

Some may say that already the Q500 pylon racers represent “extreme speed“:




Some on the other hand may say that only purpose built designs are worth to be called “extreme speed planes“:





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