FlyerInOKC

My Feedback: (6)

Your Saito addiction doesn't leave any money for the other two!

Jesse Open

But if he burns gaspoline instead of methanol, he can buy a lot of new planes.

FlyerInOKC

My Feedback: (6)

He can't afford to burn that much gas to save enough to buy an airplane!

Jesse Open

And that defines the paradox of purchases based on cost savings.

Glowgeek

It can happen pretty quick, even if you don't fly a lot, fly larger engines and have to drive a long way to buy $26/gl fuel. As an example: flying my Saito 180 equipped P-47 just 2 hours week on gas instead of methanol I'll save well over $700/yr. And that's only flying 8 months out of the year. Not only is gas 1/2 the cost per gallon but the engine burns about 1/2 as much per minute as well. Some climates allow for almost year-round flying and some people fly every day. It does add up very quickly for some. The only paradox involved is that you have to spend to save.

I get my nitro fix flying smaller Saitos.

acdii

When I had the FG-11 in the T-clips, I flew an hour on 12 ounces of gas. Three times run time to Glow. Downside is not the same level of power. Converting to Glow ignition is next on my list, get the power of nitro and run time of gas.

Jesse Open

If you burn methanol with spark ignition rather than glow ignition it works out closer to twice the fuel burn. A half hour or better would be normal for a FA-62 on methanol with spark.
The engine will still make more power on methanol of course.
The other perk to spark is you can eliminate the nitromethane.

FlyerInOKC

My Feedback: (6)

Does it work on 2 cycle engines as well as 2 cycle?

Glowgeek

It doesn't work on either. It's not the spark that gives double the fuel economy, it's gas vs. methanol. Adding spark to methanol engine only provides a marginal increase in fuel economy. Spark allows slighter leaner needle settings.

That said, the difference in fuel economy between using 30% nitro on glow ignition vs 0% nitro using cdi would be substantial. Still not double IMO.

Jesse Open

First off:
Do the math, I didn't claim the spark ignition "doubled" fuel economy.



Yes, the fuel economy as well as power output of methanol fueled engines improve with spark ignition. As I cleary stated earlier, the methanol fuel burn, at the same power level, with spark ignition.... is very close to twice that of a gasoline . That is a solid fact. The differences in air/fuel are a factor of about 2.27:1. Roll in the increased power output gor methanol and the 2:1 fuel burn methanol to gasoline is close.

The "three times flight duration" does not apply when using spark/methanol. (Forget the nitromethane).

The oft quoted "three times" , as applied to glow itself is actually a bit exaggerated anyhow.


The fact you do not a have to run rich mixtures to control timing saves fuel as does the controlled timing.

Eliminating the need for nitromethane further reduces consumption as well as cost .

1200SportsterRider

Yes I did, now my Webra collection is 2-91's, a Speed 61, a SilverLine 40 and a bb 20.

FlyerInOKC

My Feedback: (6)

Variety the spice of life!

Hyjinx

I ran my on collum still for a bit. The heads would run our little gems nicely, and the body would run your brain. The tails are hand cleaner. The revenuers made good fertilizer for the corn....
Just kiddin

acdii

I have quite a few gallons of FAI fuel and some once opened but sealed 10% that is probably 1% by now. They will work great for CDI conversions. If my B25 needs more power than the FG33 can give it, I could probably convert them to glow carbs.

Jesse Open

You bet!

Glowgeek

??? And here I thought you were planning on using FG36's in your Mitchell. A couple of FG33 R3s will sound incredible for sure!

acdii

33 36 whatever, too lazy to dig out the box to find the number.

FlyerInOKC

My Feedback: (6)

Close enough!

acdii

FA180 gas version. Boom there it is.

Hyjinx

🤟🤘

Jesse Open

Nice engine either flavor.

the Wasp

My Feedback: (1)

can someone or 2 or 3 tell me what the big thing is that emery cloth has over sandpaper. is it just because it's more flexible than sandpaper?
I have heard people say emery cloth doesn't scratch metal, but isn't that just what it's made for in retrospect

Jim

Hyjinx

Jim
​​​​​​My humble take based on my personal use of "sandpaper" In floor finishing any way, abrasives are generally silicon carbides or ceramic media broken into regulated *grit sizes" then electrostatic bonded to either cloth or paper backings. I.E. 40- 50 grit roughing paper, 60-80 grit mid cut, 100-120 finishing cuts. The ceramic types maintain their edge longer as they withstand and shunt heat better and re brake as they go exposing new geometric shaped edges. Older types dull the edges of the carbide and escalate with heat and exposure to the wood. Eventually loading behind the cutting edge increasing heat and dulling until it won't cut anymore and burnishes the wood instead. Return on in investment is lost, the abrasive belt, disc or drum cover or screen mesh disc is discarded.
Back in my early stamping plant life, metals were abraded with 'emory cloth" (harder media) I. E. high carbon steel, to diamond dust type medias. Bet Gary can better "Open" that can o worms....lmho.
There's -some -one.🤔
Aaron-

acdii

The grit is glued to cloth rather than paper and is of a different type of abrasive, and that is pretty much it. It is more flexible than paper, but it does scratch metal, it is the intended purpose. Much easier to use on a copper pipe than paper when prepping for soldering.

Oh, don't use it on wood, it has iron oxide as a grit and can cause damage to the wood instead of smoothing the wood, it is meant to only be used on metal.

modeltronics

My Feedback: (27)

I latched onto another FA80 intake manifold that was in much better shape than the one that was on the engine I bought at the swap meet for $20. I’m still going to try the fix the smashed intake with the ball bearings Gary sent me. That intake manifold is rare and almost unattainable. I got the engine all put back together this afternoon. The engine is the high compression version. It ran very strong on my 3% nitro home brew fuel spinning a 13X8. The idle was excellent. This engine came without an exhaust system but I found an RCS muffler at the swap meet near Dallas this weekend that fit it. This engine will be my back up for the one I have flying in a 4-Star 60.