Hi guys, just can't resist to chime in here. Last year I did some research on the Hanno and after following your interesting discussions I'm now wondering if you are aware of all the information that IS available.[sm=what_smile.gif]
I mean the [link=http://www.osengines.com/]www.osengines.com[/link] website run by Hobbico. Watch the small link [link=http://www.osengines.com/history/ostimeline01.html]Manufacturing Timeline Gallery[/link]! In [link=http://www.osengines.com/history/ostimeline15.html]1989-1991[/link] you'll find "1989 61RF ABC Hanno Sp" and in [link=http://www.osengines.com/history/ostimeline16.html]1992-1995[/link] the "1994 61RF Ring Hanno II". I'd take that only for a hint, though (see the following).
Click the small link [link=http://www.osengines.com/parts/index.html]Parts Lists & Manuals[/link] at bottom of page. Now a more visible link to [link=http://www.osengines.com/parts/discontinued.html]Parts Listings for Discontinued Engines[/link] appears, immediately showing "Old Two-Stroke Airplane Engines" with two Hanno versions among them. Bingo![sm=regular_smile.gif] But wait! Look at the item numbers: 17841 - 61 RF-P "Hanno Special" and 17843 - 61 RF-P Ring "Hanno Special". And look at the item number Jason showed on his Hanno box (post #10 above). Bummer![sm=confused_smile.gif] I'll leave the speculation to you.
The good point is that you may view pictures of many parts of the Hanno engines, though unfortunately not all (e.g. especially the crankcase is not individually depicted, but there are the pictures of the whole engine). The 6P carburetor seems to be Hanno Special special [sm=wink_smile.gif] and is shown complete. But on the Parts Listings page is a link to a [link=http://www.osengines.com/parts/carbs.html]Carburetor/Engine Cross Reference[/link] page leading to a parts listing of the 6P. There is no manual and no drawing, neither for the Hanno nor the 6P.
Some of you will already be aware of the information given by Hobbico. My interest is a mere technical one. I wanted to have a Hanno Special as a collector's item, but the prices on fleabay were too high for me (I'm cheapscate). Instead, I just bought an O.S. 49 PI rotary engine new at a discount because they were discontinued.[sm=teeth_smile.gif] But I have some data for the Hanno from an older German book.
There's a diagram showing thoroughly measured performance data (WOT power, torque, noise, over rpm). The measurements (and the book), dated 1990, come from our former German engine "guru" and should be (very) reliable (referring to the word "scientific" in the other thread[sm=49_49.gif]). They were done using what I would call FAI fuel: 18% oil and the rest methanol (MM 100). Oil was GLISSOL-R/AEROSYNTH, which is a synthetic oil.
AFAIK, there are two kinds of synthetic oil, ester and polyglycol. The author of the book co-developed GLISSOL-R as a polyglycol mixture with additives. He claims (and was ready to prove) that this oil doesn't need Castor and that it's especially suited for high-performance ABC or AAC engines (read Hanno). They would last out not only a few hours but up to 200 hours under racing conditions.
It's emphasized that the Hanno needs up to 20 hours run-in time and that a soft mount should be used. By the way, glow plug was Enya #3 for the measurements. They were done with different propellers and different lengths of the original tuned pipe (peak performance between 9000 and 14000 rpm in steps of 500 or 1000). So he got several points in the power-over-rpm diagram and connected them by an envelope going up to 1.4 kW at 14000 rpm. Using a fuel with 15% nitro and only 12% oil would increase power by about 0.08 kW (6%). Stock tuning by O.S. was for 9500 rpm giving 1.05 kW. I wonder what you guys may make from these figures.[sm=49_49.gif]
Maybe I could scan the diagram and post it here but maybe you just don't need it. The fuel/oil thing might be interesting though because it could clear up the mystery of the vastly different service lives of the engines. Just my 2 Eurocent thrown in.
B.