Considering a large Glow engine ??? For big engines, GAS is better in every way :)  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Considering a large Glow engine ??? For big engines, GAS is better in every way :)
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Considering a large Glow engine ??? For big engines, G... - 9/29/2006 4:40:48 PM   
JettPilot



Posts: 1151
Joined: 4/18/2005
From: Paradise, USA
Status: offline 		Are you considering a large glow engine for your plane ? If so a Zenoah GAS engine is better in every way . There are many advantages to gas, here they are:

1. Much more reliable, no more deadsticks and crashed planes !
2. No adjusting or messing with them at the field: Set the needles and never touch them again, no matter what the weather. No adjustments = More flying !
3. They last forever. If you dont crash a Zenoah, it will outlast your plane, and even outlast you
4. Less fuel consumption. Lets you put a smaller sized tank in your plane for the same flight time = less weight.
5. No oil mess to soak your balsa, and destroy your plane over the years.
6. Way cheaper to operate You can fly all day for 2.50 for a gallon of regular. The same day using glow would take more than 2 gallons of glow fuel at over 30.00
7. Carbs on GAS engines are pumped, you never haave lean runs, or fuel tank problems, it will suck every last drop out of the tank from full to empty, no elaborate fuel setups needed.

Just look at weedeaters, snowblowers, chainsaws, etc. You dont see people constantly fiddling with the needles on their lawn equipment !!! People in the business use their whackers and blowers all day, every day, and never have to mess with the engines They dont have maintenance on gas engines either, they just always work, year in and year out, they use em and put them away wet, no problem.

My Zenoah G-45 has flown over 2000 miles, has been run for idle in flight for 15 minutes and then throttled up many times, has flown at many altitudes and weather conditions with no adjustment needed, and has NEVER had a deadstick. I have never even had the sparkplug out of this engine, I just start it, run it all day, and forget it.

How do I know it has been flown for over 2000 miles, click on the link below and you will see for yourself:

http://media.putfile.com/RCVideoCrossCountryFlying

JettPilot




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RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 4:45:49 PM   
Dr1Driver



Posts: 3589
Joined: 7/25/2002
From: Spartanburg, SC, USA
Status: offline 		Jett,

I've always told people, "If you're considering an engine over 1.20, consider gas." The new Zenoah G-20 makes this choice especially easy now.

The only 2 pro factors for glow in this size are:
1. Lighter weight
2. More pure power.

Dr.1

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(in reply to JettPilot)
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RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 6:23:10 PM   
bla bla


 

Posts: 1580
Joined: 9/19/2002
From: Oslo, NORWAY
Status: offline 		Seriously good stuff Baldy, you're done a great job and with this motor discussion, I completely agree with you 100%.
Your wife a cracker also, even though I may have mentioned that before. Knowing me, I have.... several times.

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BR blabla

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       Post #: 3

RE: Considering a large Glow engine ??? For big engine... - 9/29/2006 6:30:10 PM   
Motorboy



Posts: 1693
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline
quote:

ORIGINAL: JettPilot


4. Less fuel consumption. Lets you put a smaller sized tank in your plane for the same flight time = less weight.

JettPilot



Gasoline has high energy about 43 500 joule/kg while methanol has 19 800 joule/kg, therefore gas engines are profitable.

Jens Eirik


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Jens Eirik
All landings are just controlled crashes!

(in reply to JettPilot)
       Post #: 4

RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 8:09:47 PM   
Sport_Pilot



Posts: 7728
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		Let me start by saying I have never owned gas. The only thing I know is what I see at the field and my experiance with my weed wacker, edger, chain saw.

quote:

1. Much more reliable, no more deadsticks and crashed planes !
Well I have seen that with gas planes at the field, maybe somewhat less.

quote:

2. No adjusting or messing with them at the field: Set the needles and never touch them again, no matter what the weather. No adjustments = More flying !
I don't have a problem with this with glow. At home my weed wacker is worse than most of my glow engines about needing constant adjustment, the two stroke gas tools are fine.

quote:

3. They last forever. If you dont crash a Zenoah, it will outlast your plane, and even outlast you
OK, but I have yet to wear out a glow engine that was bought new.
quote:

4. Less fuel consumption. Lets you put a smaller sized tank in your plane for the same flight time = less weight.
True but less power for their size.
quote:

5. No oil mess to soak your balsa, and destroy your plane over the years.
That would be nice, but no castor oil smell either.

quote:

6. Way cheaper to operate You can fly all day for 2.50 for a gallon of regular. The same day using glow would take more than 2 gallons of glow fuel at over 30.00
It's cheaper till you crash your quad digit plane. Saw someone recently who hadn't crashed one in years have several crash's of large gas planes in a month. I don't have enough room for glow, let alone gas.

quote:

7. Carbs on GAS engines are pumped, you never haave lean runs, or fuel tank problems, it will suck every last drop out of the tank from full to empty, no elaborate fuel setups needed.
You can get pumps and regulators for glow also.

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(in reply to Motorboy)
       Post #: 5

RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 9:28:55 PM   
bla bla


 

Posts: 1580
Joined: 9/19/2002
From: Oslo, NORWAY
Status: offline 		What is it about this Glow forum that brings out the freakin' anal-ists?
The mans making an opinion, a generalization you can agree or disagree, even have a laugh, pull a leg, do a bit of teasing but what with these guys the start pulling a reply apart, breaking it up into smaller quotes and then passing irrelivent comments on each bit? I often get these same guys mincing mine. I don't get it, I don't see the whit, the humour or even something technically relevent.
It's just annoying. Contribute, drive it forward... make us laugh. Don't start buy saying" first of I've never owned a gass engine" but heres my pointless comments.
Stop anal-ising what people are saying.

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BR blabla

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RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 9:49:29 PM   
joesabido



Posts: 501
Joined: 3/18/2005
From: MeridaYucatan, MEXICO
Status: offline 		Compare (for example) the OS-120AX with the Zenoah G-20

Prop range:
OS = 15x10-12 to 16x8-10
Zenoah = 14 x 6 to 16 x 6

"Practical" RPMs:
OS = 1,800 - 9,500
Zenoah = 1,400 - 10,000

Weight:
OS = around 29 oz with muffler ONLY (i.e. no extension or 90° adapter)
Zenoah = 41.6oz with muffler, ignition, and mount (without taking into account the extra battery for the ignition)

When it comes to the fuel, I don't think you need expensive 20/20 fuel for a big glow engine, cheap home-brewed FAI fuel will work just fine (I make my own FAI for about $4 USD a gallon, and I can't fly every day)

So, in my opinion it is impossible to say that a Gas engine is ALWAYS better.

I do think that the advantages of Gas engines are directly proportional to the total weight/size of the airplane where its used, since as the airplane gets bigger, the increase in wing-loading (from glow to gas) is smaller (in % of course)

Joseph

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RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 10:06:06 PM   
skiman762



Posts: 1166
Joined: 12/1/2005
From: Nashville, NC, USA
Status: offline 		this one should be good

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       Post #: 8

RE: Considering a large Glow engine ??? For big engin... - 9/29/2006 10:32:38 PM   
Dr1Driver



Posts: 3589
Joined: 7/25/2002
From: Spartanburg, SC, USA
Status: offline 		Lighten up, bla bla...

All Sport Pilot did was take Jett Pilot's points and respond to each in turn. I don't see anything "anal-izing" about it. He simply stated his rebuttal point by point rather than in a general paragraph.

This seems to be a factual/opinion discussion. If I want amusement, I'll go to the Jokes forum.

Not all of Jett Pilot's points are opinions or generalizations, some are facts.

As for contributing knowledge/information to the thread, what did YOUR post add?

Dr.1

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(in reply to bla bla)
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RE: Considering a large Glow engine ??? For big engine... - 9/29/2006 11:06:54 PM   
Flyer95


 

Posts: 978
Joined: 9/21/2004
From: STOCKHOLM Akersberga, SWEDEN
Status: offline 		Jettpilot,
The variety is important in this hobby. If everyone would put a Zenoah up front their airplanes this hobby would get very boring, dont you think so?. For some people the Zenoah is a worthless powerplant just because it is much weaker than the much lighter glow engine.

quote:


6. Way cheaper to operate You can fly all day for 2.50 for a gallon of regular. The same day using glow would take more than 2 gallons of glow fuel at over 30.00


Thats the only point I can agree with you somewhat. Which also makes me think that you fly much much more than the average modeller, 2galls/day .


(in reply to JettPilot)
       Post #: 10

RE: Considering a large Glow engine ??? For big engin... - 9/30/2006 12:12:01 AM   
Sport_Pilot



Posts: 7728
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline
quote:

ORIGINAL: Dr1Driver

Lighten up, bla bla...

All Sport Pilot did was take Jett Pilot's points and respond to each in turn. I don't see anything "anal-izing" about it. He simply stated his rebuttal point by point rather than in a general paragraph.

This seems to be a factual/opinion discussion. If I want amusement, I'll go to the Jokes forum.

Not all of Jett Pilot's points are opinions or generalizations, some are facts.

As for contributing knowledge/information to the thread, what did YOUR post add?

Dr.1


Jett pilot said nothing wrong. Just pointing out that there are some cons. Actually for me the large size of gas models is the biggest con. Just no room.

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(in reply to Dr1Driver)
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RE: Considering a large Glow engine ??? For big engin... - 9/30/2006 4:42:50 AM   
jessiej



Posts: 1803
Joined: 7/6/2003
From: STATESBORO, GA, USA
Status: offline
quote:

ORIGINAL: bla bla

What is it about this Glow forum that brings out the freakin' anal-ists?

It's just annoying



At last! a problem that is easy to solve. If you find it annoying, Don't read it!

jess

(in reply to bla bla)
       Post #: 12

RE: Considering a large Glow engine ??? For big engin... - 9/30/2006 6:10:32 AM   
Rcpilot


 

Posts: 6556
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline 		Let's stay on topic guys.


I fly BOTH. But, I've limited my glow engines to only one brand and only one size. The Tower .75 is the only glow engine that I own. I currently have 3 of them. At one point, I had 8, but I sold a few planes to thin my glow fleet down.

My reasoning is because I just don't enjoy flying larger sized glow engines. I've done all that. I've owned all the big Moki and Super Tigre engines. Had the big MDS engines and the big OS engines too. I just don't enjoy feeding them. Too expensive for my wallet. So, I limit my engines to the .75 and only use it on little 40 size 3D planes or maybe a 60 size scale ARF. I did buy a Seagull Decathlon once and used a Tower .75 in it, but I sold the plane because it had incidence issues. I'm mainly interested in the 3D planes and it takes a .75 to hover a little 40 or 46 size in Colorado.

I like the 50cc and up to 80cc gassers because I'm just hooked on aerobatic planes. I really like flying the IMAC patterns, although I haven't competed in 3yrs. Admittedly, I don't have the guts to get down low and huck my $2000 gas planes on the deck like I do with a $350 glow plane. I just really enjoy gas engines. I find them very user friendly and easy to tune.

Both engines have advantages and disadvantages. I think, to get the most enjoyment from the hobby, you need to recognize when to use each type of engine. I won't fly a 25% plane anymore because I refuse to use a large glow engine, and they simply aren't big enough for a 50cc gas engine. I could buy a 35cc or 40cc gas engine and put it on a 25% plane, but given my location and flying altitude of 6000'--it just ruins the wing loading to attempt a gas engine on this size airframe. Thats why my minumum gas engine is a 50cc.

But, I could be wrong.

< Message edited by Rcpilet -- 9/30/2006 7:19:29 PM >

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