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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Davis Diesel Conversions
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Davis Diesel Conversions - 7/9/2002 11:51:12 AM   
lvflyer-RCU


 

Posts: 36
Joined: 6/7/2002
From:
Status: offline 		I would like to know anybody's experience with converting their engines to diesel.

Thanks
       Post #: 1

Davis Diesel Conversions - 7/10/2002 5:01:16 AM   
dennis



Posts: 1309
Joined: 1/7/2002
From: Minersville, PA, USA
Status: offline 		They really do work well, be prepared to get a lot of negative feedback on them. Also be prepared to learn all about motors again. Having said that i've run Bob Davis's heads for over 25 years with more then satisfactory results.

(in reply to lvflyer-RCU)
       Post #: 2

Davis Diesel Conversions - 7/10/2002 2:04:02 PM   
Ed Cregger


 

Posts: 7996
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		I love model diesel engines. I have owned a couple of the DDD conversion heads and they worked fine. The only thing that saddens me is that I have become chemically sensitive to the ether that model diesels use in their fuel. Bummer.

_____________________________

"Flying models since the Fifties"

Saito Club Member #52

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       Post #: 3

David Diesel - 7/10/2002 5:39:58 PM   
Hobbsy



Posts: 10842
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		LV, Davis heads come with very good instructions, if you follow them your engines will run exactly like Mr. Davis claims. I'm surprised that a bunch of guys who couldn't follow the directions haven't posted how poorly the conversions work. One thing to remember that isn't stressed quite enough in the instructions is to seek the lowest compression setting it will run at and not the highest. A Diesel conversion or a factory Diesel will never deadstick until out of fuel.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

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       Post #: 4

Davis Diesel Conversions - 7/12/2002 4:00:00 AM   
panzer66


 

Posts: 77
Joined: 4/29/2002
From: New York, NY, USA
Status: offline 		Do you use the regular diesel fuel (at gas station)? Do you have to add other ingredients to make the fuel?

BTW, how much is the conversion for a .72 Irvine engine?

Thanks.

(in reply to lvflyer-RCU)
       Post #: 5

Davis Diesel Conversions - 7/12/2002 7:04:09 AM   
dennis



Posts: 1309
Joined: 1/7/2002
From: Minersville, PA, USA
Status: offline 		The fuel is not what you buy at the pump. It is a mixture of Ether, kerosene, and oil. It is commercially bought either from Davis, red max, aerodyne, or eric clutton.
To the best of my knowledge there is no head for the irvine 72,however, best check at davis diesel at 203-877-1670 to confirm.

(in reply to lvflyer-RCU)
       Post #: 6

Davis Diesel Conversions - 7/27/2002 6:44:40 AM   
rsrogers



Posts: 554
Joined: 3/24/2002
From: Clyde, NC, USA
Status: offline 		The only experience I've had with the diesel is a guy at our field tried it & liked it but he stunk so bad from the fuel he sat by himself most of the time so he switched back to glow. I guess we get used to smelling the glow fumes on our clothes but the K-1 in the deisel mix is hard to get used to.

(in reply to lvflyer-RCU)
       Post #: 7

davis diesel conversions - 7/27/2002 7:49:10 AM   
dennis



Posts: 1309
Joined: 1/7/2002
From: Minersville, PA, USA
Status: offline 		Actually we use a little candle scent,whatever flavor turns you on. The girls love it as there is no harsh medicinal smell.
Also since your using a motor that is insensitive to back pressure you might as well run a pipe to the tail of the plane and dump the exhaust off there. Done properly there is almost no clean up to do.
finally if you are just not careful with handling the fuel, and you should have a sealed delivery system , and spill some fuel on you and you have that candle scent in, well you still might have to sit by yourself, only because the others will be wondering...............

(in reply to lvflyer-RCU)
       Post #: 8

Davis Diesel Conversions - 8/19/2002 11:14:48 PM   
Dr. Wine



Posts: 117
Joined: 6/28/2002
From: Luling, LA,
Status: offline 		I just bought a PAW .09 (British). Only ran it on the test stand, but WOW!!!. Yea it stinks but you can mix your own fuels using scented lamp oil known as paraffin (high grade kerosene).

On the test stand with a Zinger 7.5 x 5 wood she will turn up 11, 250 rpm, and thats with a 3' piece of automotive fuel line hooked to the muffler. With a Master Airscrew 8 x 4 composite she will turn up to 12,120 rpm and that's with the same carb and compression settings. It surprised me and I still don't understand it. And as far as idle, I forgot to take a reading but with the Master prop she will idle down so low it doesn't even sound like it's running. Transitions nice too.

At first I had to use an electric starter because I didn't know what I was doing. After an hour of playing around I realized that if the engine is cooled down, primed correctly and with the compression lever turn down 1/8 turn, the damn thing will start on the first flip. Oh yea, be sure to get that finger out of the way QUICK. It hurts.

After some tests flights in the near future and everything works fine, I plan to buy a larger diesel or convert an old Fox .45 ringed engine. No one at my field flies diesel therefore I won't get all that crazy contradictory advice from the old farts.

Keep the wings level.

Dr. Wine

(in reply to lvflyer-RCU)
       Post #: 9

Diesels - 8/20/2002 2:00:20 AM   
Hobbsy



Posts: 10842
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Doc, I have three PAW's and love em, a 19, a 40 and a .60. I believe if you convert your Fox .45 you'll have to get a .50 cylinder and piston and make it a .50, and it makes a very good diesel.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

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       Post #: 10

Davis Diesel Conversions - 8/20/2002 2:10:30 AM   
dennis



Posts: 1309
Joined: 1/7/2002
From: Minersville, PA, USA
Status: offline 		Dr wine, sure you'll get a lot of advise, .mainly though they'll complain about the stink, the dead grass, and your hogging the frequency pin

(in reply to lvflyer-RCU)
       Post #: 11

Davis Diesel Conversions - 8/20/2002 2:13:13 AM   
Dr. Wine



Posts: 117
Joined: 6/28/2002
From: Luling, LA,
Status: offline 		Thanks Dennis, you must be one of those "old farts". Ha Ha Ha

(in reply to lvflyer-RCU)
       Post #: 12

Davis Diesel Conversions - 8/20/2002 2:15:29 AM   
dennis



Posts: 1309
Joined: 1/7/2002
From: Minersville, PA, USA
Status: offline 		Nope, a very old diesel user

(in reply to lvflyer-RCU)
       Post #: 13

Davis Diesel Conversions - 8/20/2002 2:18:51 AM   
Dr. Wine



Posts: 117
Joined: 6/28/2002
From: Luling, LA,
Status: offline 		Glad to hear it. I think my next engine purchase will be a larger diesel. I will probably still convert the Fox 45.

Keep your wings level!

Dr. Wine

(in reply to lvflyer-RCU)
       Post #: 14

PAW .09 R/C - 8/20/2002 5:47:44 PM   
FrancisPerson


 

Posts: 680
Joined: 12/14/2001
From: Germantown, MD, USA
Status: offline 		Dr. Wine,


I have a PAW .09 R/C on a Leasure Amptique. To avoid mess on the airframe I have a 40" by 5/16" exhaust pipe. It only costs me 200 rpm, but that plane only needs 1/4 throttle or less to fly! As soon as possible I will try a Master Airscrew 8x4 composite prop and report. The fuel that Eric Clutton sells cannot be beat for price or performance.


Oily in Germantown


P.S. The PAW .09 IS NOT as powerful as my OS FP .10 Davis Diesel conversion!

(in reply to lvflyer-RCU)
       Post #: 15

Davis Diesel Conversions - 8/20/2002 5:56:32 PM   
Dr. Wine



Posts: 117
Joined: 6/28/2002
From: Luling, LA,
Status: offline 		FrancisPerson,

That's very interesting about the O.S. FP .10 conversion. The RPM readings I took on the PAW .09 were with a 3' piece of automotive fuel line attached to the muffler. The engine and plane (Sig Colt) should be in the air next week.

Perry J. Beebe

a.k.a. Dr. Wine