OS 1.60 fx break-in  
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OS 1.60 fx break-in - 12/11/2001 8:10:20 AM   
T28pilot



Posts: 721
Joined: 12/11/2001
From: Colfax, IL, USA
Status: offline 		How much fuel should i run thru this motor for break in?
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OS 1.60 fx break-in - 12/11/2001 3:15:59 PM   
ShempHoward


 

Posts: 1147
Joined: 12/4/2001
From: San Francisco, CA, USA
Status: offline 		In a previous post you said you are getting unlmited verticle and recommended the plane to somebody who you don't know who was foolishly thinking of putting a ZDZ40 on it. You also mention you are running a 20X8 Pro Zinger on an OS 160fx?? That prop is a good 2" too large for that engine and will lug it down far too much causing it to overheat. An 18X8 or 18X10 are much better choices for this engine. The instructions that came with the engine indicate these sizes as the largest recommended. Edited by Taildrager

< Message edited by Taildrager-RCU -- Dec 11 2001 5:09PM >

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RE: break-in - 12/12/2001 6:04:43 AM   
T28pilot



Posts: 721
Joined: 12/11/2001
From: Colfax, IL, USA
Status: offline 		Thank you for you thoughts shemp.....

my book stopped at the os 91 fx?

i know a couple guys at our club that fly the sig 300l with this motor using the same prop? the 20x8

but i think i will go with your suggestion and try the 18x8

if for nothing else for Break-in

also what would you recomend for fuel??:p

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OS 1.60 fx break-in - 12/12/2001 4:33:29 PM   
ShempHoward


 

Posts: 1147
Joined: 12/4/2001
From: San Francisco, CA, USA
Status: offline 		In the last few months the 160 FX was reviewed by C. Lee in RCM who seemed quite impressed with it. His largest prop for the test was an 18X10 I believe but the 18X8 should yield around 8800+ RPM on Cool 15% which is a good fuel designed for ringed engines. The Lanier Edge 540T (using a 160 FX) was tested in a recent issue of RC Reports where they ran a 17X8 prop. OS does not recommend going any larger than 18X10 although on a rare occasion they come up with some strange prop suggestions for some of their other engines.

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Re: OS 1.60 - 12/14/2001 7:01:43 AM   
T28pilot



Posts: 721
Joined: 12/11/2001
From: Colfax, IL, USA
Status: offline 		But Still how much fuel should i run thru a 2 stroke before i attemp to fly it?

I got about 1/2 a gallon thru it now?

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OS 1.60 fx break-in - 12/14/2001 5:25:11 PM   
Elwood



Posts: 1512
Joined: 12/11/2001
From: Wayne, NJ,
Status: offline 		Ahhhh, this is an age old subject that has no right answer, unless the answer is yours! How long to break in an engine???

I think that for an aircraft engine, 3 tanks of fuel should be fine. That is my (very general) rule of thumb and has worked on several engines. A good indication is (after you lean it out over this process) how it accelerates. Can you go from idle to WOT without hickups? Is it smooth during the transition? How does it start? Is it making full power? If it does not seem ready after looking into these things, you might need to run another tank through. Also, a bad mixture will give bad indications such as these, so make sure it is right on!

As for a high performance NovaRossi type race engine for cars and trucks, you will need more time (like 6 tanks) to break it in due to a tighter fit of the piston and sleeve. This is what I did with mine, and now it still screams with over 1 gallon through it. It is moving my RC10 GT, so it has its work cut out for it!

Good luck!

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Thanks - 12/15/2001 6:14:16 AM   
ricfly52


 

Posts: 133
Joined: 12/7/2001
From: Las Vegas, NV, USA
Status: offline 		T28pilot, Gee thank you for posting this topic. I am about to buy an OS 160 FX. I kinda figured that it would be a good engine. Listening to all your responses here, helps me a lot.

Let me know how yours turns out.

Rick
[email]ricfly52@aol.com[/email]

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RE:OS 1.60 - 12/15/2001 7:05:35 AM   
T28pilot



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From: Colfax, IL, USA
Status: offline 		well going from what p1800volvo
says it is ready.......no lag in run up idles great....
but ........ it did that from the first time i started it....so.....
I am going to run the rest of this gallon of 15% thru it and then fly it weather permitting....we got snow here in illinois today...but it is going to go away soon they say......powerful motor.....i think you will like it......the first 1/2 gallon it had the 20x8 pro zinger on it and i will be switching it to the 18x8 per shemps advice.....

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OS 1.60 fx break-in - 1/9/2002 6:36:05 PM   
BIGRCR


 

Posts: 105
Joined: 12/16/2001
From: SC
Status: offline 		My experience so far with the 1.60,

I am using the same motor in a Hanger 9 Cap 232 (73" and now have 10 tanks through it. I am using the stock muffler with baffle and turning both (swapping off last two tanks) a Menz Ultra 18x10 and a Zinger 18x6-10 both fairly rich at about 8200-8400 (dependant on prop). My fuel is 10% nitro and 20% oil.

So far I am very happy with this engine. Since it is very cold it will back flip against compression to start only after being warmed up, but a chicken stick after wetting out will have it running after 2 or 3 flips. If it starts backward, advance the throttle to full and it will cough and quit, then quickly drop the stick to idle and it will usually reverse to the right running direction.

Oh Yeh! I like the Zinger 18x6-10 much better. The 18x10 Ultra goes fast, does not have the pull and provides no braking to assist landing. The Zinger 18x6-10 pulls better, flies a little slower, broadens out the throttle a bit and provides an aid in landing!
I'm still searching for the BEST prop for the engine /airframe combo. Any advice would be appreciated!

So far I am very happy!

BIGRCR John Garst


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Prop - 1/9/2002 7:19:41 PM   
T28pilot



Posts: 721
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From: Colfax, IL, USA
Status: offline 		I hear alot of guys using a 18x6 for 3d flying

keeps it slower and u got the power to pull out of anything

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18 x 6 Zinger - 1/9/2002 10:07:30 PM   
Fly Elvi



Posts: 44
Joined: 12/27/2001
From: Las Vegas, NV, USA
Status: offline 		Using this prop on my Sig Extra 300 with the OS FX 160 and I seem to get the best all-around performance, landing, etc. Have used 16 x 10 (way to fast-hard to land), 17 x 8 APC (not bad-not quite the verticle I wanted) and the 18 x 8 which would now be my 2nd choice (wood Zinger). I like the wood props better for some reason.....easier to balance I guess.....

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easier to break too - 1/9/2002 10:35:33 PM   
T28pilot



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From: Colfax, IL, USA
Status: offline 		easier to break too....which is a good thing so it doesn't hurt your motor on a bad landing.......:p

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Disclaimer:- These are my views ..not the Views of RcUniverse or any of its employees..all views of MINE are Just that..Mine..Unless it is a bad post in my little part of the Forum..then i have to do my job

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OS 1.60 fx break-in - 1/11/2002 7:23:58 AM   
BIGRCR


 

Posts: 105
Joined: 12/16/2001
From: SC
Status: offline 		Thanks guys! I will try an 18x6. Thanks for saving a few bucks on trial and error!

BIGRCR John Garst:

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OS 1.60 fx break-in - 1/13/2002 10:29:50 PM   
Icebird



Posts: 400
Joined: 1/7/2002
From: Calgary, AB, CANADA
Status: offline 		I tried a few different props on my 160FX on my Dave Patrick Ultimate, and settled on an APC 18X6 Wide as the best choice, with the ProZinger 18X6 as second. This gives me the best vertical, best braking, and most consistant speed on my plane, so it works great for 3D as well as sequences. I'm at almost 4000 feet here, so I need a little more performance than those at sea level, and this prop made all the difference. At sea level, it would probably hover at about 1/3 throttle!

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X is an unknown quantity, and Spurt is a drip under pressure!

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os160 - 1/17/2002 6:51:08 AM   
UNLDAVE


 

Posts: 266
Joined: 1/13/2002
From: prunedale, CA, USA
Status: offline 		We have a guy at our field with an OS160 in a Sig Xtra xs who's running an 18-6 dyna thrust prop. 3/4 to full throttle he makes a heck of a prop ripping noise .We'll be glad when he goes to a 17-8!



It's only too much fun when you get home too late from the field for honey dos!!!!

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Re: os160 - 1/17/2002 9:20:30 AM   
Icebird



Posts: 400
Joined: 1/7/2002
From: Calgary, AB, CANADA
Status: offline 		I found a really good use for Dyna Thrust props! They mix house paint as good as any commercial paint mixing stick. Other than that, it's pretty much a waste of power to put one on an engine. My APC or my Pro Zinger make very little noise. Of course, I'm aware that my throttle is not an on/off switch, so that might make a difference too. The guy with the Extra at you