Can anyone tell m how to convert a glow engine to diesel....

Isearched the internet but could'nt find any useful info......

Please Help.......

http://www.davisdieseldevelopment.com/price_list.html


check out the above link.

if you want to diy - you'll need access to machine tools

Lots of interesting links there.

http://www.davisdieseldevelopment.com/gallery/closelook.htm

http://www.davisdieseldevelopment.com/diesel_conversion_0S46LA.php

Looks like the head and fuel tubings are the ones that have major change.

i have converted a super tigre 40 to diesel with a DDD head. DDD recommended 12 % castor 33% ether 2% amyl nitrate,(or Amsol Diesel booster) which i can't get for love or money and the rest kerosene.
By the way diesel pundits recommend only CASTOR never synthetics.
It turned a 13-6 prop around 7500 rpm. like a 4 stroke. or i could put a 10-10 prop if i wanted a fast bird.
there are 60-70 pages of information on RC groups and RC universe.
the compression ratio is much higher in diesels. so the head is different.
You can easiliy get gas (petrol) compatible fuel tanks and lines for the diesels.

I tried to convince Rishi Kumar at hobby centre Kolkata to convert an old 46 engine to diesel.
Instead i bought a sparingly used 40 british made irvine deisel which he had lying around. He also showed be a 0.5 cc Allen Davis diesel.
One of the few dedicated schnurle ported dedicated diesels.
The other day Mr. nausher flew a 90 size plane with a british made Taplin twin 7 cc diesel at chennai.
If you want to buy a 7.5 cc deisel- Aurora contact Rishi.  PAW still makes upto 7.c cc (46 size) RC diesels.
nice to know someone is interested in diesels.
Avijit

Doc's diesel conversion was a sucess and he was flying it too. The best part was the long exhaust tube he had on the muffler to keep all the gunk away, you could do this with diesels without noticable power loss.
On the other hand the 90-120 size supersportster powered by 7 cc diesel taplin twin was grossly underpowered, but then again power of diesel was evidenced when it was able to swing a large prop and still fly that huge bird, ably assisted by a very capable pilot
BTW, the best Indian made diesels are made by Sharma models in Jodhpur (actually they are close related to PAW designs)

Quote from: avijit17basu on March 01, 2010, 08:13:18 PM
nice to know someone is interested in diesels.

My biggest surprise with diesel (being a relative newcomer to this hobby) was the fuel blend itself. That fact that it had nothing to do with diesel as we know was a shock ! 

Are there any specific advantages to diesel, which are not available with engines other than glow (like gasoline ones) ? 

And how about the availability of the various items that are needed to make "diesel" fuel blends ?

QuoteMy biggest surprise with diesel (being a relative newcomer to this hobby) was the fuel blend itself. That fact that it had nothing to do with diesel as we know was a shock !  

The term "diesel" came about because these are "compression ignition" engines like diesels.

It's adoption could be likened to "Xerox" - which was amongst the first commercial photocopy machine manufacturers - to become synonymous with "photocopy".

QuoteAnd how about the availability of the various items that are needed to make "diesel" fuel blends ?

Ether, kerosene and high viscosity mineral oil (preferred to castor) are easily available. Don't know about conversions but the "good old" diesels could be an absolute pain to hand start because of rapid evaporation of the ether in hot weather.  Often returned from the field without a single flight because of this!

Quote from: sushil_anand on March 02, 2010, 11:16:31 AM
Often returned from the field without a single flight because of this!

Yes, that is another thing often expressed by diesel users. 

So what is the advantage that people are seeking, as compared to gasoline (for example)   It is quite possible that those are the old days though, when this issue was prevalent.

the advantage is something which today's glow and gas engines don't give.
On the field you could adjust the timing to get optimum performance from your engine for the prop you are using.
the problem is ether which has a boiling point of 35 degree celciuswould conpletely evaporate on a sunny day.
so i fly diesel on sunny days. I use speciel glass to store the ether and fuel between flights.
Avijit

You mean "non sunny" days, I presume!

Again to dispel the myths associated with starting a diesel.
You should see CL team races in UK/Europe where the trained pitman catches the model before it lands, refules it before the model is touched to the ground (per rule it has to land which means it has to touch the ground and remain stationary) and immideately picked up, prop flicked and the model is launched from the hand all this in a couple of seconds.  
A well run-in and tuned diesel, can be easily restarted if you know how to. The tricks are, right compression and right kind of flick.  

Europe seldom experiences our kind of temperatures. My experience has been otherwise. Maybe someone "flicked" my tuning expertise

Also some engines (like both the Mills)  were very easy starters compared to others.

Yes sir Mills were always a peach to start, but give the same mills to a guy who does not know how to flick and see him swear at diesels.
At our local field, I always encourage newcomers to hand start thier engines (Chicken stick method) so that they get a feel for the engine.
I am sure even you would have often seen people who at the flying field fuel up, hook on the glow and keep grinding  the engine  and when it does not start blame the engine for it. 

I agree with 'Flyingboxcar'. I could start almost any 2.5 cc or bigger Diesel engine with just one flick. I Won numerous NCC competitions in Control Line speed etc. The feel for the engine that Flyingboxcar mentions was acquired after zillions of cut fingers    and lotsa blood   . We (my Friend and I) probably ware responsible for the success of Band Aids in India   . The ether based fuel was always brought to the field in small enough quantities and always stored in shade with a cloth thrown over it loosely. The easiest was a (I could never figure out its ccs) huge 6-7 cc engine and the most 'womanlike' (why do they do that?)    were the 0.75 and 1 cc engines.  

What CL speed models were you flying Verma and what engines? Oh and BTW which year/s was this?

And on those cut fingers thank god during our time we did not have APC props to slash the fingers, else we would not have been left with as many of them

I really am foggy on the names part, Captain. I do remember Speed Bug, then those other one winged wonders which seemed all engine and no other body parts, which were a mother to fly (control). I personally built a delta winged wonder but could not participate with it as it would pitch up and down uncontrollably after a few minutes of flying and achieving speed. In hind sight, it may have been due to the large elevator and its control horn position. I was forced to use the good old Peacemaker 3D. My starting skills made me win it, as the others spent all the allotted ten minutes trying to start their engines. This was some time in 1984-86. I started flying C/Ls on Sky Bee during 1979-81. And no, I did not win any big time events. Only the regional ones (UP). The Vayusainik camp journey was made without reservation and broke a lot of models in trying to entrain.

I just bought a few Scimitar Props. You are right, the first thing I noticed was  how sharp the edges are and how am I going to flick it?

By the way I wanted to ask you if you have any special affinity towards the C-119 Fairchild Packet aircraft (nicknamed flyingboxcar)?  http://en.wikipedia.org/wiki/Fairchild_C-119_Flying_Boxcar
Because my Dad flew them almost all his flying life.
Regards
P.S- Sorry for stealing your thread Speedracer

I guess it was Rudy/Speed Bug, then there were Midge, Mite the CL speed birds from good old Aurora models. I never participated in any NCC competition but did lot of RnD for the teams being sent to various NCC camps and Comps. All this while I was with NCC and out of it.
Even my start into powered flying was with a sky bee junior and K 150 diesel.

My affinity to Packet is due to the CL packet model which I found at the aero modelling section when I joined the NCC. Turned out that te model was made by the first CO of the unit under who my Father was cadet and did his gliding. I resurrected that nearly derilict model and we flew it "once".
Ever since I was after a kit of that model and was able to source an original Japenese Toki Moki kit last year.      

Good to know about your dad, those Boxcars without the auxillary unit took some effort and skills to fly from hot and high fields or when loaded up 

You were so right about the 'feel' while flicking. The back pressure on the prop alone could tell whether the engine was primed too rich or the dull flick sound the fact that it required to be primed. I too started on the K 150 and skybee (friends plane) from IHC Delhi.

The Fairchild Packet was a legendary aircraft. Also, 'Bock's Car'was the name of the B29 that dropped the bomb over Nagasaki. Strange coincidence huh?!

  I still remember the good old day of the Ether,Castor & Kero. The ration was 2:1:1  and the models were to begin with the free flight on the Mills with the Cessna , Eliminator and with the C/l Sky Bee Jr. & Sr. they had 2 versions 1.5cc and the 2.5cc. The ever famous Peace Maker and I think that was no 3D as CL had no 3D. Then there was Magic, Great Guns and the speed model was Rudy Beck. I still have these model in box. The Mercury days were the best. Diesel engines were Paw, Mills, Enya, Irvine, Elfin, Taplin, Rossi, MVVS, DC (Dennis Charlton from Isle of Man, they got the concept of the spring start which Cox's copied)and many more. The dope & tissue days of the old.  This was the era which got the best designers to build models, the Godfather was a man named late Mr.David Boddington and the same model are either modified or copied. Long Live the era of the Diesel engines. Always when back from the flying field my Mom used to tell me that I smelt like a hospital. lol