Thread Tools
Feb 25, 2012, 11:02 PM
Registered User
Quote:
Originally Posted by scrubmonkey
Where can you buy diesel engines now. I am pretty new and an old fella here said he'd be willing to teach me the ins and outs of them. I want to put one in a phoenix classic (if that's possible). If I can't buy them now is it possible to convert a glow? What size diesel would you put in the classic any way?
Heaps of diesels on eBay. Look, and you shall see.

Check PAW website......They are available in OZ also.
Sign up now
to remove ads between posts
Feb 26, 2012, 02:50 AM
Sticks, Tissue & old Diesels
brokenenglish's Avatar
Quote:
Originally Posted by Twin-Stack
My FROG 50D Mk. II...
For Bob and GH,
I think there's some confusion about the Frog 50 Marks.
The Mark I is identifiable by its slightly different lower profile head, which is clearly shown in GH's photos.
The Mk II has the same crankcase, still with the perpendicular NVA, but with a slightly larger, and slightly different shape, head.
The Mk III is easiest to identify, it's the only one with a swept back NVA and the "stroking" band around the crankcase.

So Bob, the engine you think is a Mk II, for me, is clearly a Mk III.

One other point, these Frogs never had "original" radial mounting plates, but all the front rotary Frogs were said to be radially mountable just by removing the tank and using the backplate retaining bolts. That's why these bolts are longer than apparently necessary, although many have since been shortened (to get the engine snug up against the firewall when using a separate tank).
Brian
Last edited by brokenenglish; Feb 26, 2012 at 02:57 AM.
Feb 26, 2012, 03:22 AM
Closed Account
Brian, the very first engine that I ever owned was a FROG 50D Mk. II, and it took me about 40 years to find another, brand new example. The test below by Peter Chinn, "Model Aircraft" magazine February 1957 issue....
Feb 26, 2012, 04:10 PM
Registered User
Scrubmonkey, if you are looking at the Phoenix, plans, page 181 post #2710, the model plan is suggesting a 3.5 to 5 cc diesel, or a .21 to .30 cubic in engine. All up weight about 4 lbs. Look for an Irvine.20 D for R/C or if you have deep pockets an OT Major 3.5 R/C which is still available from Tom R....see back a few pages.
John
Feb 27, 2012, 01:27 AM
Sticks, Tissue & old Diesels
brokenenglish's Avatar
Quote:
Originally Posted by Twin-Stack
Brian, the very first engine that I ever owned was a FROG 50D Mk. II, and it took me about 40 years to find another, brand new example. The test below by Peter Chinn, "Model Aircraft" magazine February 1957 issue....
Bob, Thanks for your pdfs. Hmmmh, we obviously have a slight Frog problem, both of us!
Firstly, the Mk. I is definitely the one GH showed, with the fins extending down to the bottom of the head, and no "wider band" on the bottom of the head (this is the one RHW tested in AM 8/52).
Secondly, the engine you thought to be a Mk II, with the strap under the crankcase, is actually a Mk III.
Now, if we accept these two identification criteria, that still leaves us with two different types of Mk II. Apparently, some have slanting back NVAs and some don't...
So, for me, there's no problem with the Mk III, but we have three different configurations to split between two types of engine (Mk I and Mk II).
As I keep explaining to Madame... it's this kind of thing that drives a good honest guy (or even me) to drink!
Brian
Feb 27, 2012, 02:09 AM
Closed Account
Quote:
Originally Posted by brokenenglish
Bob, Thanks for your pdfs. Hmmmh, we obviously have a slight Frog problem, both of us!
Firstly, the Mk. I is definitely the one GH showed, with the fins extending down to the bottom of the head, and no "wider band" on the bottom of the head (this is the one RHW tested in AM 8/52).
Secondly, the engine you thought to be a Mk II, with the strap under the crankcase, is actually a Mk III.
Now, if we accept these two identification criteria, that still leaves us with two different types of Mk II. Apparently, some have slanting back NVAs and some don't...
So, for me, there's no problem with the Mk III, but we have three different configurations to split between two types of engine (Mk I and Mk II).
As I keep explaining to Madame... it's this kind of thing that drives a good honest guy (or even me) to drink!
Brian
Brian, there are much more important things in life than arguing the point over model engines, so I'm happy to let it be (as the Beatles famously once said) and get back to my wine glass ! BOB
Feb 27, 2012, 02:10 AM
Registered User
The plane I want to put a diesel in is a .40 size glow arf. Can I get a diesel big enough or should I go with a Davis diesel conversion
Feb 27, 2012, 02:58 AM
Registered User
Gluehand's Avatar
Quote:
Originally Posted by scrubmonkey
The plane I want to put a diesel in is a .40 size glow arf. Can I get a diesel big enough or should I go with a Davis diesel conversion
If the ".40 size ARF" you have in mind has a reasonably low wing loading, I would say you'd be fine (and safe) with anything from a PAW .29 and up.

I have seen a Long Cabin (78" span) and a Red Zephyr (72" span) fly real nice, even in some wind, with a PAW .19, though their wing loadings are obviously lower than the "average ARF" of today....
I once had an own designed low-winger (54" span) , performing in a lively & nice way with a PAW .19...IIRC its weight was about 3 lbs.....

Have you seen the PAW range of diesels..?

Last edited by Gluehand; Feb 27, 2012 at 03:10 AM.
Feb 27, 2012, 03:24 AM
Registered User
yes i had a look. is there an australian distributor? it is really hard to find stuff on their site
ps. it would be best if it is throttled (i hear most diesels aren't)
Last edited by scrubmonkey; Feb 27, 2012 at 03:31 AM.
Feb 27, 2012, 04:06 AM
Registered User
Gluehand's Avatar
Quote:
Originally Posted by Twin-Stack
...there are much more important things in life than arguing the point over model engines, so I'm happy to let it be (as the Beatles famously once said) and get back to my wine glass ! BOB
Yes, Bob & Brian......trying to sort out version histories could be a never ending subject...just look at vintage motorbikes & cars......mostly the manufacturers made one change at a time, while Version Numbers were "time-stamps", living their own life, just in order to keep historians busy...

So, leaning back sounds like a good idea....I figure we all learned SOME more in this process....thanks for your inputs..!
Feb 27, 2012, 04:54 AM
Registered User
Quote:
Originally Posted by scrubmonkey
yes i had a look. is there an australian distributor? it is really hard to find stuff on their site
ps. it would be best if it is throttled (i hear most diesels aren't)
Google, Owen Engines.........He can look after you with an RC PAW 40.

Nice guy David Owen, and has some nice stuff.
Feb 27, 2012, 05:02 AM
Registered User
WRT the Enya 4-stroke diesel.

I have a useful bit of experience with this engine.

Shims are provided for the head ... thus, the CR is fixed.

Find a prop with which the engine is comfortable; then just stick with that prop. Great little engine which absolutely will not stop running, so long as there is fuel available.


Here's my Enya diesel, flying an ARC Ready.

Hal autoleveller and ARC Ready (7 min 57 sec)
Feb 27, 2012, 06:13 PM
Closed Account
Interesting throttle valve on this KO - possibly made by the village blacksmith. These things had dual NVA's at one stage, hence the 2nd hole I guess.
Feb 27, 2012, 10:47 PM
Registered User
TLyttle's Avatar
I had an ME (Heron?) that had throttle on it that was almost as crude, a butterfly of sorts above the needle, so that it simply flooded the engine down to an idle. It worked, amazingly...
Feb 28, 2012, 04:21 AM
Voices through wires? Ha!
Chas's Avatar
Bogbeagle, nice video, thanks...used to drive on that road past Beverley with a bunch of single channel models which I'd smashed up in Cottingham, on their way to repair facilities in Darlington :-) is it still open land ?


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
diesel engines wyflyer_55 Fuel Plane Talk 13 Jun 02, 2017 11:35 PM
Diesel Engines Aeromister Engines 18 Apr 19, 2017 11:25 PM
scale model of engines dw1122 Life, The Universe, and Politics 4 Apr 11, 2016 10:39 AM
Discussion Need help with two diesel engines ! cosmin Engines 4 Apr 18, 2014 07:18 PM
WTB-Model Diesel Fuel slogo Aircraft - Fuel - Airplanes (FS/W) 3 Nov 13, 2004 09:42 PM