RE: ENYA .15 Diesel MK-II R/C
Jim, I must admit to being a little surprised that you have broken a shaft on the second Model 15 Enya Diesel. The 15D Mk. 1 was fairly well known for breaking shafts, but Enya then beefed up the Mk. 2 shaft considerably. Actually, looking at your photo, its not the shaft that's broken, but the crank-pin. I would tend to think that this was not due to a shaft fault, but more likely an operator fault - maybe a hydraulic lock when trying to start. The 15D Mk. 1 used to break its shaft in front of the crank-web, and it went through several upgrades to cure the problem. Incidentally too, this is a good place to warn owners of old Diesels about a problem that I have found in nearly all Diesels which are 20 or more years old ie. the contra-piston is frequently locked solid, and needs to be physically removed from the liner for cleaning and re-oiling. If you try and move the contra on a 1950's Diesel which has lain un-used in its box since manufacture, it is possible to actually strip the thread in the head where the comp adjuster screws in. I would hate for someone to pay big bucks for, say, an early ED Comp Special, and then strip the threads out in the soft alloy head trying to shift the contra piston. Further details can be found by reading "A Sticky Situation" in the article section on the Supercool Racing Propellers site. BOB
Posted on: 11/16/2009 7:57 PM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=9258776

New Indian Mills Replica's
For those who may be interested, I present the following information from Paul Nilanjan in India. He is seeking a Distributor for his Mills Replica's and 1.5cc front induction Diesel's. BOB Hello, We are manufacturers of Model Diesel Aero Engines and are looking for buyer for our own brand of 'PICO' Model Diesel engines. Following are the details of our 2 Stroke Classic Model Diesel Aero Engines: 0.75cc Model Diesel Aero Engine with clear see-through piggyback fuel tank; FOB Price USD42 a piece 1cc Model Diesel Aero Engine with clear see-through piggyback fuel tank; FOB Price: USD50 a piece All prices are FOB Calcutta, India. MOQ for these Engines is 1 pieces each, We club shipping for overseas orders. We accept PayPal or online wire transfers to our Bank Account. Shipping as per Customers choice or by Insured Parcel service. We ship within 5 working days. For more information please email us at paulindustrialco@gmail.com Regards Paul Nilanjan Cell Ph: 00-91-9163219878 Paul Industrial Company 30A, Kasundia Road, Howrah-711101,INDIA. Email: paulindustrialco@gmail.com Ph:00-91-33-26406248
Posted on: 11/16/2009 5:04 PM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=9258361

RE: Enya 40SS RC
As stated above, the plain bearing SS 40 is listed in Enya literature as having a "plain" (ie. iron) piston. Strangely though (but par for the course with Enya! ) the ball raced SS 40 is listed as having a ringed (alloy) piston. Seems they were aiming at 2 different markets - economy and de-luxe. BOB
Posted on: 10/9/2009 9:16 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9160486

RE: Does anyone else love Enya engines?
Thanks Brian ! Does anyone know for sure what combo the 49X and 25X used ? I suspect ABC, but will wait for positive confirmation on that. Further to the alloy cylinder versus brass debate, I have Enya sheets which list the weight of both Al-Chrome and ABC CX11's side by side. With R/C throttles, the ABC version weighs in at 6.7 oz. , while the Al-Chrome model is 4.6 oz. In standard C/L guise, the weights are 6 oz. and 4.2 respectively. Peter Chinn's August 1980 MAN test of the 45X makes interesting reading (quote) "An aluminum sleeve does not appear to have any significant mechanical advantage over a brass one, but as aluminum is only about a third of the weight of brass (or, for that matter, of iron or steel, the other commonly used cylinder materials), it not only makes for a lighter engine but enables a thicker liner to be used, so that angled ports - as in a Schnuerle scavenged engine - are more effective in directing gas flow. The 45X for example, is 6 percent lighter in weight than the 40X, despite its larger displacement and in spite of having a 23 percent thicker cylinder wall." As well, in Chinn's April 1977 test of the (first) 60XF, he noted that the new Al-Chrome 60 ran considerably cooler than the previous Enya 60's with steel liners and ringed pistons. It seems as if the Enya team were constantly experimenting with metalurgy, and released some strange engines - I myself bought a NIB Enya 35X ABC in standard C/L configuration off eBay a few years ago. It has a factory fitted brass insert within the outer machined alloy insert. Very interesting ! BOB
Posted on: 9/9/2009 2:18 AM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9080826

RE: Does anyone else love Enya engines?
When it comes to discussing the metalurgy that Enya has used over the years, we are faced with a bewildering variety of piston and liner combinations. Here are some (more contributions are welcome) - 60XF - 1 Al-Chrome 60XF - 2 Ringed alloy piston 60XF - 3 ? 60XF - 4 Al-Chrome 80XF single conventional ring / alloy piston / steel liner 40X Dykes ring / alloy piston / steel liner 45X Al-Chrome 19X ? 21X Al-Chrome 35X Heli ABC or ringed piston 35X Aero ABC CX 11 early ones Al-Chrome, later ABC CX 50 ABC SS 45 ringed alloy piston SS 50 ringed alloy piston SS 25 both (bushed or BB) lapped cast iron piston / steel liner Optional Al-Chrome on BB SS 15 both (bushed or BB) ABC (some anyway) SS 30 basic plain bearing - lapped cast iron piston / steel liner SS 30 twin BB shaft - ringed alloy piston Optional lapped cast iron piston / steel liner It would appear that the Al-Chrome process (ie. chrome plated alloy cylinder / alloy piston) was a more expensive operation than the ABC (chrome plated brass liner / alloy piston) and first appeared on Enya's flagship engine, the 60XF. Although the Al-Chrome would seem to be inherently no better performance wise than ABC, its big advantage was weight saving. This is why the early CX11's were much lighter than the later ABC's. BOB
Posted on: 9/8/2009 8:47 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9079981

RE: Club Enya
And the other side !
Posted on: 7/23/2009 4:28 AM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8956939

RE: Club Enya
Is this what everyone is looking for ? BOB
Posted on: 7/23/2009 4:16 AM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8956932

Uni-Flow engines
Does anyone know anything about these engines ? BOB http://www.50products.com/english/unfl/unfl.htm
Posted on: 7/11/2009 8:40 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8925030

RE: Oliver Tiger Major
[quote]ORIGINAL: raglafart Hi Bob What was the difference between the Mk I and Mk II. Was it just the modified crankcase with extra meat around the rear bearing and change in venturi? Were there any other differences? Cheers John [/quote] John, Just in case Phil is watching, let me say from the outset that an Olly Major looks nothing like a Taipan marine engine. Apart from the very un-Olly looking venturi that you mentioned, the only thing I know is that the Mk. 2 is supposed to have a longer piston skirt to eliminate sub-piston induction, as well as better counterbalancing on the crank, which (after reading the Engine Test of the Mk. 1) is probably a good thing. If you want to see the one I bought, its eBay item #270418466827. I wonder if the fact that the Rivers Silver Arrow had roller bearings contributed in any way to its smoothness ? Does the prefix "M" before the Serial # signify that the engine is Factory Modified ? I thought that Ollys had the Serial # on the L.H. lug, and M and HC (chromed bore) stamped on the R.H. lug. BOB
Posted on: 7/4/2009 7:46 PM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=8906795

Oliver Tiger Major
Has anyone had any experience with these ? I'm wondering if the Mk. 2 Major was an improvement on the Mk. 1, which apparently was a bit of a shaker. Strange that the 3.5 Rivers was almost as smooth as a glow engine, yet the Olly Major is more typical of a large Diesel engine. If anyone knows if Peter Chinn ever mentioned the Mk. 2 Major in his "Latest Engine News" (Aeromodeller) column, I'd love a scan of same, and all comments welcome ! Thanks, BOB
Posted on: 7/3/2009 12:29 AM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=8902653

RE: Why don't we put technology to work ?
ALL you guys are missing the point here ! I'm not talking about trying to convert the grey headed old farts who have been flying competitively for the last 50 years or so - I'm not even talking about the youngsters who fly F2B (few as they are) - what I AM talking about is PUTTING THE FUN back into C/L flying ! Believe it or not - for every one flyer out there who can fly the pattern, there has to be at least 10 who CAN'T (and probably never will - such as myself for instance). That's todays figures - back in the 1950's, it was probably 1 expert to at least three or four hundred "sport" flyers, who just enjoyed doing a few loops and lazy eights. How many car drivers are out there ? How many can drive Formula One ? The time is 1 minute to midnight - after the present lot of experts fall off the perch, who will still be flying Control Line ? Answer : nobody will, simply because so much emphasis is placed on being able to fly stunt at a professional level, and not enough on simply enjoying a great hobby and having fun. BOB
Posted on: 2/4/2009 4:09 AM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8436760

RE: Why don't we put technology to work ?
Guys, I am well aware of the downfalls of the old mono-line system, what I am suggesting is the plane carries a miniature radio receiver and working a servo to control the elevators. BOB
Posted on: 2/2/2009 8:30 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8431704

Why don't we put technology to work ?
Ever since I read an article by Dale Kirn back in the late 50's, I've always had an urge to try mono-line C/L, the main attraction being that (with a single line) you can fly with an 09 on 100 ft. lines ! The big drawback with mono-line then, was the awkward handle you had to use, which (after learning to fly with a conventional 2 line system & handle) was like trying to pat your head whilst rubbing your (beer ?)belly ! But now we have all this whiz-bang technology available, why aren't we flying 40 size models on a 200 ft. mono-line ? We could have a conventional handle which you move the same way, but with radio signals sent to the model - a completely electronic C/L system ! Anyone who has watched large 10cc stunters on the end of 60 ft. lines must surely have thought it was all out of proportion & scale. Biggest advantage to loooong lines is, a whole new aerobatic pattern could be developed, simply because you have more sky to fly in ! The mind boggles when you think of some of the complicated manoeuvres that could be easily fitted into that much space. BOB (PS forgot to mention too - no more twisted lines)
Posted on: 2/2/2009 7:06 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8431390

RE: Is this a repackedged PAW??
Over the years, the PAW factory have made several Commemoritive Editions of their little 80, usually just with some "tarting up" ie. gold anodised head & matt finished crankcases. If memory serves me correctly, David Owen (who was the Aussie PAW agent at that time) got the factory to produce a Bi-Centenary Limited Edition back in 1988. They are all now quite collectable. BOB
Posted on: 1/3/2009 7:38 PM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=8314649

RE: Scan of old MAN article wanted
Problem solved - I have my engine test ! Many thanks to Dave Segal for helping me out - much appreciated Dave ! BOB
Posted on: 11/27/2008 6:12 PM by Author "74SEVEN7" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=8189720

Scan of old MAN article wanted
Guys, if anyone has a copy of Model Airplane News dated April 1969, I sure would appreciate a good quality scan of the Engine Test done by Peter Chinn on the Taipan 61. My email is - bobshirl@bigpond.com Thanks in advance, BOB
Posted on: 11/26/2008 5:59 PM by Author "74SEVEN7" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=8186420

RE: Ohlson and Rice 23
I'm not an expert on these, but looking in my book, it appears to be a wartime 1945 to October 1946 Model. Says they were "Built under the Air Youth program." BOB
Posted on: 11/21/2008 10:03 PM by Author "74SEVEN7" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=8170847

RE: Enya 19
In reply to Luna Rendezvous - I should have specified that I handle (almost exclusively) the older Enya's, from the period 1950 through to about 1980. We call them the "classic" Enya's ie. they are not Schnuerle ported, and most have plain iron pistons. Incidentally, I made a small error above when I referred to the Enya 40 being a Model 6001. It is, of course, a Model 6002. With regard to your Enya 30, read this article on "piston growing" - http://www3.telus.net/dieselcombat/about_diesels.htm I have dabbled in this area a bit, and have had a little success, but I offer no guarantees ! This subject has also been covered extensively on other forums, and it may just improve your 30. BOB
Posted on: 11/14/2008 5:50 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8147736

RE: Enya 19
Colin, if there is one thing I've learnt from my (admittedly far from comprehensive) study of the internal combustion engine, its that sometimes things happen for which there is no rational or scientific explanation. Sometimes, a design (like the FOX 35 for instance) is just about perfect from day 1, whereas another engine (such as the fabled OS Max 15 Diesel), which is designed from the ground up to be a world-beater, will flop badly for no apparent reason. Most Enya's will work OK in the reverse mode, yet still be an easy starter, but the 19-IV seems to trip up slightly. Why ? Who knows ? When I was looking for an Enya 40 Model 6001 which could be easily hand started (remembering my experience with the Dykes ringed McCoy 40 Series 21), I closely examined 4 brand new engines until I found one with enough "slow turning" compression that would allow hand starting. Another example is PAW Diesels - when you have a dozen or so 15's and 19's, you discover that less than half of them have, what you would call, a great piston / cylinder fit. The wild card is - the ones that "feel" great when un-run, may well turn out to be not as good as the ones that you would reject ! In other words, there are variations within a particular model of a model engine which defy logic. Remember too, we are just talking about simple, basic single cylinder engines here - imagine the complexity and multiplied problems of trying to de-bug a H24 Napier Sabre engine, as used in the WW 2 Hawker Typhoon ! I consider that Enya engines have the finest piston / cylinder fit (the single most important thing for un-ringed 2 stroke engines) to be found in model engines, and second only to COX in consistency - that means that the very best Enya fit is better than COX, but the COX doesn't vary much whereas I have found Enya has 3 grades : 1) Average (meaning 9 out of 10), Below Average (meaning 8 out of 10), and Above Average (meaning 10 out of 10) BOB
Posted on: 11/14/2008 3:52 AM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8145986

RE: Enya 19
Just harking back to the aforementioned "iffy" starting of the Enya 19-IV, it might interest you guys to learn that this was first described 40 years ago by Peter Chinn, both in his July 1968 Engine Review for MAN, and also his Jan. 1969 Engine Test for Aero Modeller (see attachment). I do have a theory why the 19-IV might have been slightly less than perfect in the starting department ; anyone who knows anything about Enya's will be aware that they can be made to run in reverse, simply by unbolting the front housing and rotating it 90 degrees, so the intake is on the starboard side looking from the rear. In the 19-IV, the intake timing is (deliberately ?) arranged so that it is exactly 45 deg. ABDC to 45 deg. ATDC, regardless of whether the venturi is vertical or sticking out the R.H. side. Compare this to the following 19-V BB which has intake timing of 49 deg. ABDC to 50 deg. ATDC, and we might conclude that Saburo Enya compromised the easy starting, for an engine which would run equally well in either direction. BOB
Posted on: 11/14/2008 12:45 AM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8145749

RE: Enya 19
I must get around to asking Clair what happened to the B29 AFTER the nose came off ! BOB
Posted on: 11/13/2008 5:19 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8144245

RE: Enya 19
Bill, your mention of a 4 engined B-17 reminded me of an email I got recently. The author was none other than Clair Sieverling, who was one of my boyhood heroes, and the designer of the "Sun Devil," and El Conquistador amongst others. In this short excerpt, Clair is discussing his time as a GI near Tokyo in the mid 50's. Enjoy !
Posted on: 11/12/2008 10:05 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8141904

RE: Enya 19
Hi Bill, its nice to know that at least ONE person read my Enya articles ! Just to set the record straight though, when I said - "I recommend that anyone blah-blah", I was actually talking about the ball raced versions of the Enya 19-V & VI, not the plain bearing jobs. That's not to say that the bronze bushed 19's aren't great engines - they are (well, ALL Enya's are !). Its just that from an engineering point of view, the twin ball raced Enya 19 is a delight. The only drawback with the 19 BB is, its a bit heavier than the plain bearing model, and it doesn't really produce much more power, so unless you need a bit of weight up front (such as in a Barnstormer) you'd be better off with the plain bearing. Speaking of Enya articles too, we (that's me and two other guys) are working on producing a more comprehensive and cohesive set of articles dealing with the Enya brand, to improve on my somewhat disjointed earlier efforts. Finally, the original author of this thread (Bass1) showed us a photo of HIS Enya 19, which is actually a 19-IV. These earlier models are even better suited to C/L stunt work, as they are old technology with a longer stroke than the V or VI, but they need a wider spacing between the engine mounts to fit 'em in. I hope I can now prevail upon Colin Weaver to extoll the virtues of his Enya 19-IV ! Cheers, BOB ALLAN
Posted on: 11/12/2008 8:31 PM by Author "74SEVEN7" in the forum "Control Lines"
http://www.rcuniverse.com/forum/fb.asp?m=8141566

Drone Diesel variable compression head
I am looking for a new Aerodyne variable compression cylinder head for a Drone BB Diesel. If you have one, I will buy or trade big (how about a whole NIB engine ? ) Can email me at - bobshirl@bigpond.com Thanks Guys, BOB ALLAN
Posted on: 9/22/2008 5:35 AM by Author "74SEVEN7" in the forum "Everything Diesel"
http://www.rcuniverse.com/forum/fb.asp?m=7978381

RE: Stuck Enya 60
Holy Cow ! Did someone mention Taipan Marine engines ? I'm outa here ! Seriously, can you believe anyone could be so narrow minded as to ban photographs of a boat engine on a control line forum ? Hey - what about R/C engines and those weirdo free flighters ? We should burn them at the stake for heresy. I stand by my comments, and for those who maybe don't understand what I'm talking about, click onto Barton Forum. BOB
Posted on: 8/28/2008 8:26 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7896885

RE: Stuck Enya 60
Mike, there's nothing magical here - I just copied what Peter Chinn said in his engine reports. Are you SURE the piston ring is rusted to the cylinder ? Its just that I've NEVER seen a rusted bore or piston ring - that is, unless the engine has been dunked in water. Normally, if the engine is brand new (or briefly bench run) there is ALWAYS a thin film of dried oil which precludes corrosion. Unless you can actually SEE rust in the cylinder, assume its just stuck fast. If it IS rust, well you're probably in trouble. A new ring (obviously ! ) will be needed, and care will have to be taken extracting the piston to avoid scoring. In OZ, you can buy very fine steel wool (0000 grade) which is good for cleaning a bore with. Regarding the ball races - I had a twin ball race ENYA 35 Special which was new and unrun, yet felt "lumpy" when cold. Warm it up near a log fire though, and it smoothed out. Cold again, lumpy ! Eventually, I pulled the front housing off, and flushed the races out in acetone - result, smooth as silk, hot or cold. Its the congealed castor oil which is the problem. Good Luck ! BOB
Posted on: 8/28/2008 5:39 AM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7894473

RE: Stuck Enya 60
The ENYA 60-11 Model 7032 was released in 1965. At the end of 1969, ENYA released the 60-111 Model 7033 and this engine was tested in MAN March 1970 issue. The 60-111 B (still Model 7033) was first released in Japan in August 1972, and it was tested in MAN April 1973 issue. These are the main differences - the piston in the earlier 60-111 was turned from bar stock, while the 111 B had a piston machined from a high-silicone alloy casting. Earlier model fitted with 2 piston rings, later model single ring, with no bronze bushes for the wristpin. The cylinder head in the later 111 B had the squish band enlarged to 3mm (from 1.5mm) and the compression raised to 10 : 1. The thickness of the crankweb on the shaft was increased from 5.5mm to 7mm, also the induction port opened up slightly. Minor mods to the cylinder liner included a reduction in the width of all the ports (from 5.5mm in the older model,to 5mm in the 111 B) which gave a 9% reduction in actual port area, but the ports were open for a little longer on the 111 B. One of the biggest changes to the 111 B was the option of the larger G8 carby, which (while needing to be pressure fed) gave as much power with the muffler ON, as the smaller carb. gave with an open exhaust. BOB
Posted on: 8/28/2008 2:02 AM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7894234

RE: Space Control History
Even though I'm not a R/C flyer per se, I have dabbled in writing up short histories of model engines, and I find your information very interesting. I was in my early teens when Space Control was being advertised in American Modeller etc., and it still sticks in my mind as being the "Rolls-Royce" of radio systems - wonder what the asking price back then equates with today's money ! I derive pleasure from reading stories such as yours, as when we've gone, who will write the history of all these great old products ? It kinda reminds me of the fact that when the Civil War ended, everybody who was around at that time just wanted to forget and get on with their lives. If only we still had all those glass photo plates which nobody wanted, and were used to make glasshouses ! Congratulations on a job well done ! BOB
Posted on: 8/13/2008 8:15 PM by Author "74SEVEN7" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=7842955

RE: ENYA 60 XF
Thanks to all for your input ! As far as I know, the very first 60 XF had the plain piston, but at the moment on fleabay there is a 60 XF 11 (this is shown clearly on the box lid) item #110278161843 which is a ringed model. I thought maybe it had something to do with more reliability in the helicopter application, but your collective comments suggest otherwise. THANKS ! BOB
Posted on: 8/9/2008 10:47 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7828358

ENYA 60 XF
Has anyone had extensive experience with the ENYA 60 XF engines ? As far as I know, they went through 4 models from the original XF to the XF IV. What I would like to know is - why did some have ringed pistons, while others just had the plain alloy piston running in the chrome plated alloy liner ? Was there any difference in the running or longevity between ringed & plain, and how did ENYA's metalurgy stack up against other manufacturers (mostly) ABC piston & liners ? Thanks, BOB
Posted on: 8/8/2008 8:45 PM by Author "74SEVEN7" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7825372