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Old 01-04-2014, 09:34 AM
  #25976  
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Originally Posted by RC Specialties
Happy New Year everybody!
Happy New Year to you too. Keep up the good work!!
Old 01-04-2014, 12:34 PM
  #25977  
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Hey Pete, I've been around, we went on a walk about or should I say a drive about, and on that trip we had three separate Christmases. I have used 5%, 10%, 15% and a single gallon of 20%, except for a couple of hundred rpm there isn't much difference. I think there are special rose colored glasses for reading tachs at higher nitro %'s and I don't own a pair. The greatest enhancenment I've tried so far is the TurboHeader.

I haven't suffered any attacks by unappreciative youngsters, uninformed youngsters have nothing with which to attack so we're safe there.
Old 01-04-2014, 01:29 PM
  #25978  
SrTelemaster150
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I haven't done any tests W/GI, (nor will I) but W/CDI in my high compression FA180 RPM W/an 18X8 prop went from 8450 RPM W/15% Cool Power to 8850 RPM W/30% O'Donnell Speed blend.

400 RPM, especially at that performance level in the baseline, is quite significant, going from 3.43 HP to 3.98 HP. That's a 16% increase.
Old 01-04-2014, 02:22 PM
  #25979  
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The Senior Pattern guys are limited to 91's for 4 strokes. They pretty much all use 30% for those extra 300 rpms. At one time you would find mostly OS Surpasses but I've heard that some guys were using Saitos. Their club engine guru once published in their newsletter that Saitos didn't hold up to 30% nitro.
Old 01-04-2014, 04:03 PM
  #25980  
SrTelemaster150
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Originally Posted by blw
The Senior Pattern guys are limited to 91's for 4 strokes. They pretty much all use 30% for those extra 300 rpms. At one time you would find mostly OS Surpasses but I've heard that some guys were using Saitos. Their club engine guru once published in their newsletter that Saitos didn't hold up to 30% nitro.

The extra RPM W/more nitro only paints part of the picture. Those extra RPMs are the result of more torque. That extra TQ is available throughout the usable RPM range. Just because the engine will produce more RPM doesn't mean you have to spin those extra RPM constantly to take advantage of the increase in usable power.
Old 01-04-2014, 05:48 PM
  #25981  
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My post came out with sarcasm I didn't intend. That said, I didn't say that I agree with all of those views. With the right props, the extra rpms would help smooth out power application on vertical maneuvers.
Old 01-05-2014, 12:35 AM
  #25982  
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Jim, yes water freezes and leaves the "goog liquid" behind
Old 01-05-2014, 12:42 AM
  #25983  
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Hey Old fart and others, I actually launched a playboy, and 2 other medium powered a/c for my mate today. The first time I have actually "handled" a model since the accident. Sort of a milestone I guess and I actually flew successfully an electric "foamie" (A Radian) for 15 minutes. So the arm is coming good as is the attention span. On the less good side (for me) one of the local hobby shop guys was so frustrated with his "useless GK 72" that he was going to scrap it. A quicker person than myself bought it (I would say stole it in a less charitable mood) for $AUD 70. The prop was misaligned on the shaft leading the original owner to believe the shaft was bent. Prop re aligned, carby cleaned fitted to a new model (after the original owner left) and was happy powering the model in mild aero's. +*&%#!!.
Old 01-05-2014, 12:48 AM
  #25984  
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Old fart we have run as high as 55% nitro in Saito's and YS's and in the modified OS61 60%. You have to test these upper levels with a variety of props to get the best results. The torque developed is the thing which allows better pitched props, thus better climb etc. Not a simple thing as each engine has its own individual tolerence level and the quality of the nitro definitely comes into play as well. However in your case 30% give or take 5% is a good starting point. And re the beer like the BCF advert I use an Engels, only put ice in the drink.
Old 01-05-2014, 03:52 AM
  #25985  
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Originally Posted by SrTelemaster150
I haven't done any tests W/GI, (nor will I) but W/CDI in my high compression FA180 RPM W/an 18X8 prop went from 8450 RPM W/15% Cool Power to 8850 RPM W/30% O'Donnell Speed blend.

400 RPM, especially at that performance level in the baseline, is quite significant, going from 3.43 HP to 3.98 HP. That's a 16% increase.
Lets open a can of woop aaarrzz here.. i'll run my 220 at 10% nitro with a mas 20x8 classic against your 180 hdbbcxyl on the same prop.Would be good fun,now i understand what barry was saying re smooth throttle applications in a vertical climb,nice rolling prop torque too.
Old 01-05-2014, 05:02 AM
  #25986  
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Originally Posted by Old Fart
Lets open a can of woop aaarrzz here.. i'll run my 220 at 10% nitro with a mas 20x8 classic against your 180 hdbbcxyl on the same prop.Would be good fun,now i understand what barry was saying re smooth throttle applications in a vertical climb,nice rolling prop torque too.

Post your RPM.
Old 01-05-2014, 05:07 AM
  #25987  
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I'm having an issue with the fuel tank and carburetor location in my cub. I'm using the 90T would a Perry Pump work on this engine? If so what version pump?
Old 01-05-2014, 05:18 AM
  #25988  
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Steve, I'm not the one to answer your question,, my fave is the Cline regulator due to the fact that the engine runs exactly the same from full tank to empty. The Cline works very well with a Y to the carbs on the T series. Here is my older Laser 1.80 with a Cline Tee'd to the carbs.


As to the nitro % war, I'll just be "observatory" and watch, I don't see myself ever seeing big nitro %s being worth it.
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Last edited by Hobbsy; 01-05-2014 at 05:25 AM.
Old 01-05-2014, 05:35 AM
  #25989  
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Originally Posted by SrTelemaster150
Post your RPM.
Got a 20x8 mas classic to swing on your 180?
Old 01-05-2014, 06:35 AM
  #25990  
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Originally Posted by Old Fart
Got a 20x8 mas classic to swing on your 180?
No but I might just get 1 when I place my next order. Only a little over $12.

Interpolation says that it should swing a 20 X 8 about 7450 on 15%, 7750 on 30%. The 18x8 is a bit small, the 20x8 should get the engine into a good torque RPM.

I have 22x8 Zinger & a 22X10 Xoar

Last edited by SrTelemaster150; 01-05-2014 at 06:39 AM.
Old 01-05-2014, 06:38 AM
  #25991  
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Originally Posted by smkrcflyer
I'm having an issue with the fuel tank and carburetor location in my cub. I'm using the 90T would a Perry Pump work on this engine? If so what version pump?
An oscilating VP-20 Perry pump will work quite well. A Perry pump that relies on crankcase pulse won't because the pistons travel in the same direction so there won't be a pulse.

Last edited by SrTelemaster150; 01-05-2014 at 06:46 AM.
Old 01-05-2014, 12:56 PM
  #25992  
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Count me into the Saito club. Picked up a nearly new, 11 minute run 100 Golden Knight today at the swap meet. If it didnt have the oil on it, it would look like it never had fuel through it.
Old 01-05-2014, 02:16 PM
  #25993  
Jim Branaum
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Originally Posted by acdii
Count me into the Saito club. Picked up a nearly new, 11 minute run 100 Golden Knight today at the swap meet. If it didnt have the oil on it, it would look like it never had fuel through it.
I want that for my Corsair! That is the 'engine of choice' and all I have is 91's and 150's...
Old 01-05-2014, 07:51 PM
  #25994  
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Love them Saitos. Good engines.........
Old 01-06-2014, 08:17 AM
  #25995  
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How is it compared to a YS 110 in power? That is the engine I have lined up for the Corsair, but if the Saito can pull it with a 3 blade as well, then I might use it instead, but would be a shame to bury it in a cowl, it looks so damned nice. Would make a nice paperweight if it turns out to run like crap.
Old 01-06-2014, 08:23 AM
  #25996  
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Originally Posted by acdii
How is it compared to a YS 110 in power? That is the engine I have lined up for the Corsair, but if the Saito can pull it with a 3 blade as well, then I might use it instead, but would be a shame to bury it in a cowl, it looks so damned nice. Would make a nice paperweight if it turns out to run like crap.
It won't heve the same power as the YS110.
Old 01-06-2014, 09:05 AM
  #25997  
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Then in the Chipmunk is goes! It will standout with the black and gold against the white cowl, I will use the Magnum 91 elsewhere.
Old 01-06-2014, 02:46 PM
  #25998  
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I am actually modifying the fibre glass cowl for my Marutaka Stinson Reliant so I can "fit" the 115 in side the cowl and have the 2 rocker covers exposed. The cowl blisters are actually far enough apart to accomodate this. The exhaust will be directed to a canister muffler (exit(s) as per original) via a flex exhaust pipe. Just got to make sure cooling airflow is ok. That is unit 1 of air in to at least unit 2 of heated exhaust being past out of the cowl.
Old 01-06-2014, 03:13 PM
  #25999  
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Anyone using a four blade prop on the Saito 200 V-Twiin in a warbirds?
Old 01-06-2014, 03:48 PM
  #26000  
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Had my hands on a FG11 the other day. Nice 'little" toy that if it conforms will be a good device for the Texaco event in Old Timer events and in any case sgould work well ib smaller scale models.

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