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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> 15% during winter?
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15% during winter? - 10/19/2007 10:22:43 PM   
propboy4138


 

Posts: 10
Joined: 7/30/2007
From: , NY, USA
Status: offline 		Hi all, I'm new to R/C flying and I started in the summer with 10% nitro and now club members are advising me to switch to 15% for the cooler months. Temperatures in the 40s and 30s. I'm running a Tower Hobbies .75 2 stroke. Is there any truth to this? Thanks!
       Post #: 1

RE: 15% during winter? - 10/20/2007 4:47:50 AM   
XJet


 

Posts: 2984
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		Dunno -- if (as some claim) more nitro makes your motor run cooler then it would make more sense to run *less* nitro wouldn't it?

We don't change our nitro ratios from one season to another -- we just use 5% in 2-strokes and 10% in 4-strokes -- they all run fine all year round.

Mind you we're not bold/stupid enough to fly when the temperature drops below zero and our maximum summer temps are probably no more than about 85 deg F

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       Post #: 2

RE: 15% during winter? - 10/20/2007 4:54:06 AM   
gamesbeer1


 

Posts: 2347
Joined: 2/27/2006
From: elkton, MD, USA
Status: offline 		no you don't change any thing. you just tune for the season(weather+conditions)

< Message edited by gamesbeer1 -- 10/20/2007 4:55:16 AM >

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RE: 15% during winter? - 10/20/2007 6:11:40 AM   
propboy4138


 

Posts: 10
Joined: 7/30/2007
From: , NY, USA
Status: offline 		I see, the logic behind it was that in colder temperatures you want more nitro to make the engine run warmer? I ran some 15% today and it seemed just as good as the 10% if not better.

(in reply to gamesbeer1)
       Post #: 4

RE: 15% during winter? - 12/2/2007 9:08:14 PM   
masonman


 

Posts: 396
Joined: 10/27/2006
From: Wynne, AR, USA
Status: offline 		Wrap some ten foil around the cooling fins on your engine an head. Poke a few holes in it with a pen. Works for me when its 20 or 30 degrees

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       Post #: 5

RE: 15% during winter? - 1/14/2008 9:20:33 AM   
timmy45140



Posts: 133
Joined: 2/18/2005
From: Hamilton, OH, USA
Status: offline 		There is no point in changing your fuel. I usually change to a hotter plug in the colder months. I haven't heard the aluminum foil trick yet, so I don't know how well that works.

Tim


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       Post #: 6

RE: 15% during winter? - 1/15/2008 12:55:33 AM   
Jezmo



Posts: 639
Joined: 6/26/2006
From: Spring, TX, USA
Status: offline 		The coldest I've flown in was the mid twenties. F of course. I don't do anything special for winter other than tune it properly just as I would when it is warm. A couple of weeks ago it was in the low thirties and I had to fly about 5 or 6 minutes and then land to warm the hands. I would go back up for another 5 or 6 and then land again. Took three runs to empty the tank and by then I was ready to call it a day. Guess I am spoiled to warmer weather. We don't have many days in the 20's and 30's around Houston.

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Raptor 50 V2 OS 50 Hyper, T-Rex 450XL CDE, Spektrum DX7, SuperTigre OS FOX Saito Enya Jett TT

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       Post #: 7

RE: 15% during winter? - 2/21/2008 5:36:55 AM   
get14me


 

Posts: 4
Joined: 1/15/2008
From: Derry, NH, USA
Status: offline
I live in NH. We fly year round, rain, sleat, snow, or shine. like the post man

I just watched a FS 180 run on 5% with glow on battery it was 18% F

motor ran great. Im finding the right plug will make all the differance .

Gary

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       Post #: 8

RE: 15% during winter? - 2/23/2008 1:39:39 AM   
Alex570


 

Posts: 71
Joined: 3/31/2006
From: West Sunbury, PA, USA
Status: offline 		Doesn't more nitro make an engine run cooler?

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what?

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       Post #: 9

RE: 15% during winter? - 4/19/2008 4:14:33 AM   
get14me


 

Posts: 4
Joined: 1/15/2008
From: Derry, NH, USA
Status: offline 		Delayed responce , I just getting use to this thing (RC Univ)

I dont have a answer .. Im new to this hobby, less than 1 year.

I do fly with Joe Rob, and i rely heavily on his 42 years of experience.

(in reply to Alex570)
       Post #: 10

RE: 15% during winter? - 4/20/2008 7:59:58 AM   
Flyer95


 

Posts: 911
Joined: 9/21/2004
From: STOCKHOLM Akersberga, SWEDEN
Status: offline 		More nitro makes the engine start and run better in colder weather. However 10% nitro is good enough for colder weather. I have been flying a lot in the -10, -18 degree celsius range. My Saito fourstrokes and OS twostrokes will run and idle great and very low. I also use OS-F glow plugs in all the two and fourstrokes. You just need to set the needles slightly richer than in hot summer days.

(in reply to propboy4138)
       Post #: 11

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