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Gas or Glow

Old 01-02-2015, 10:54 AM
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egrave1
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Default Gas or Glow

I have a airplane that weights 10LB has a 66" wing I am debating on weather to go glow or gas what is everybody’s opinion
Old 01-02-2015, 07:52 PM
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Bladejunkie
 
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Gas
Old 01-03-2015, 06:28 AM
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power flight
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30cc DLE would be my choice.
Old 01-03-2015, 12:15 PM
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landeck
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What size engines do the instructions call for?

Bruce
Old 01-03-2015, 03:59 PM
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egrave1
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it calls for a 1.20
Old 01-03-2015, 05:44 PM
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skyraider71
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Saito 150.
Old 01-03-2015, 06:14 PM
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Rv7garage
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+2 on the Saito 150.

--Glow is simpler (no timing, sensors, ignition battery packs)
--Glow is lighter for any given displacement
--Glow is more powerful for any given displacement
--(totally subjective) Glow smells better than gasoline fumes
Old 01-03-2015, 07:28 PM
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It's also $20 a gallon,av gas 100LL is $5.50 a gallon.
Old 01-04-2015, 04:03 AM
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Rv7garage
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True, pre-mixed glow fuel is more expensive!

Are you really using 100LL, not just regular unleaded??
Old 01-04-2015, 04:30 AM
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A 30cc+ gas engine ;Evolution 33GX, DLE30, PTE36, Zenoah G38 have all worked well for me. I run Klotz oil with 100LL and there are minimal deposits on the plane after running plus the av gas does not stink like regular pump gas .Your vehicle and shop/house will not smell like gas . Also av gas has a shelf life of a few years even when mixed; unlike regular gas which spoils after a few months.
Old 01-04-2015, 05:16 AM
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I am pretty new to flying gas, but here are my perceptions so far:

Negatives for gas:

-More complexity with the ignition unit and battery.
-Gas storage and handling is more dangerous as it is more volatile.

Positives for gas:

-Economical.
-Dead sticks become a rather rare event.
-No glow driver or starter needed.
-No more oil to clean off the plane.

Overall I like the simplicity and elegance of glow engines, but have to say there is something about the performance of gas engines that is pulling me in more and more. I hate the smell of gas, but with good fuel containers, that can be almost eliminated. Plus using avgas, more realism is there.
Old 01-04-2015, 09:56 AM
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Yep,just started using it cause I'm tired of missing with carbs because of the ethanol in regular pump gas.Right now it's twice the price of regular here in Cali,but well worth it to me.As stated above the smell is gone,although it smells like the old Testor's model airplane glue to me I can live with it.I will start using Klotz once my engine is completely broke in,then it will smell even better.

Later Jim
Old 01-04-2015, 01:01 PM
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I moved to gas nearly 20 years ago and have pretty much stayed with it since.

Bob
Old 01-04-2015, 03:34 PM
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Originally Posted by egrave1 View Post
I have a airplane that weights 10LB has a 66" wing I am debating on weather to go glow or gas what is everybody’s opinion
Gas:
$1.99/gallon for the foreseeable future and no shipping charges.

With Saito and OS offering gas conversions, sky's the limit for engine selection.
Old 01-04-2015, 06:20 PM
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Rv7garage
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... But I still like glow
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Old 01-05-2015, 06:03 AM
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Ignitions and batteries

6 dollars per plug glow plugs, an ignitor, 20 dollar /gal, big slimy mess


Gas ignitions can be run from the receiver battery (provided you use one with decent capacity) using a device called an IBEC and that provides an instant ignition kill in the event of power loss, signal loss, or the flip of a transmitter switch, something you can't get from glow.
The plugs are 2.99 and they last forever (unless you run 100LL and get lead build up, cuz that stuff is no good for our engines)
They are more fuel efficient and it costs a whole lot less

4 stroke glow engines sound awesome.
Old 01-05-2015, 06:04 AM
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double post, sorry
Old 01-05-2015, 07:33 AM
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20cc provide slightly more than ten lbs of thrust and going bigger than that might start loading a 66" wing too much, therefore I'd suggest unless your building a rocket, stay with the recommendation of the manufacture.
Old 01-08-2015, 09:38 AM
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the manufacture Recommended a 1.20 which is 3.5hp a 20cc is only 2.5hp and a 30cc is 3.7hp so if I went to a 30cc gas engine to match the 1.20 why would there be a problem loading a 66" wing

Last edited by egrave1; 01-08-2015 at 10:08 AM.
Old 01-08-2015, 12:54 PM
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One thing you need to consider is the weight of the gasser vs. the 4 stroke glo. Gas is probably going to be heavier. You don't want a lead sled.



carl
Old 01-08-2015, 12:56 PM
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flyinwalenda
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Originally Posted by egrave1 View Post
the manufacture Recommended a 1.20 which is 3.5hp a 20cc is only 2.5hp and a 30cc is 3.7hp so if I went to a 30cc gas engine to match the 1.20 why would there be a problem loading a 66" wing
Depends what type of airframe it is. I have a PTE36cc on an Aeroworks Yak with a 72" wing and it flies great with no bad habits albeit a bit overpowered. Specs gave a range of 20-30cc for power and 9-10 pounds weight.
Old 01-08-2015, 02:50 PM
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Gas engines have been around for a long time and if it were not for the price of nitro fuel and cheap large scale ARFs it would have remained in the minority. I tried gas once and the first thing to go wrong was the ignition system. After almost losing an airframe due to this I went back to glow. If you fly a lot than from the economics gas is the way to go. I fly twice a week maybe with a total flight time of less than an hour so it didn't make sense for me.
Old 01-09-2015, 03:19 AM
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Gas allows you to go bigger and bigger flies better.

Bob
Old 01-09-2015, 04:55 AM
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Originally Posted by sensei View Post
Gas allows you to go bigger and bigger flies better.

Bob

I wholeheartedly agree with your statement, and it is the best reason for gas.

Models under 100" fly equally well on glow. Power source is a matter of preference, not cost.

I find the fuel price argument amusing. This is not an inexpensive hobby.

Many are willing to pay more for one servo than my yearly glow fuel budget, yet complain about the cost of fuel. I can't grasp the logic in this.
Old 01-09-2015, 05:40 AM
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An expensive servo is going to/should last many.many years. Fuel is depleted rather quickly(depending on one's flying schedule) so for those with a high monthly fuel use it makes sense for some of those folks to use engines that are more fuel efficient and use less costly fuel. If one flies a lot and wants to fly glow and pay the high price/gallon that's fine . I will not critique their decision or tell them I don't understand their logic,however if ones tells me they went out and bought cheap servos for a $3K plane just to save a few dollars I will probably tell them that I don't understand their logic.

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