Hanno Pretner OS 61
 

I have a Hanno OS 61 that has never been started.
This is the long stroke version of the OS 61 used in the early pattern days. It runs at lower rpm to lower the noise rules that were in effect at that time.
I am interested in the value of this motor.
I am trying to decide whether I should go ahead and run it or sell it as is.

RE: Hanno Pretner OS 61
 

They're crap, don't bother, best you pack in a box and ship it to me, I'll use it for parts :D

They're worth a pretty penny these days... Can you tell us what the build number is?

RE: Hanno Pretner OS 61
 

I can do better than that; I'll run him for you and send you a progress report. Rendegade's right, he's worth some bucks now.

RE: Hanno Pretner OS 61
 

i bid on this one............may go a bit more, if yours is like this one, it should give you an idea.

http://www.ebay.com/itm/NEW-BOX-O-S-...item4aae2aa41b

RE: Hanno Pretner OS 61
 

What is the serial number of the engine? It is embossed on the left engine mounting lug.
A NIB Hanno Special seems to be worth $500-600 these days. They are getting harder to find. Post a photo if you have the time.
-WB

RE: Hanno Pretner OS 61
 

It's "worth" what ever someone will pay for it. I'd guess $300 - $400 for a NIB without the pipe. A nice box with all packaging/documentation is a must...

The "Hanno" red pipe is still available at tower for $159.

RE: Hanno Pretner OS 61
 

I have to agree with Jeff. In the last couple of years a few did sell on the auction site for as much as $500 or $550 if memory serves.

David.

RE: Hanno Pretner OS 61
 

The most recent *bay auction was for a Hanno Special MKII with pipe all NIB which ended July 5, 2011. The selling price was $715.00. Prior to that, a NIB Hanno MKI NIB (serial #2740) with header sold for $403. In 1998 I paid $425 for a NIB MKI and a NIB MKII Hanno - that's $425 for two engines. Motivated buyers/bidders can drive the price up quickly (A NIB Hanno I was bidding on, though I stopped when the price topped $400, eventually sold for over $900 [X(], back in 2007).

RE: Hanno Pretner OS 61
 

Will, wasn't there one (engine only) that sold for something like $500-600 from a guy in Hong Kong. Engine and box were pristine.

I know I'd defer to you for any stats on Hanno's - including bay transactions... :)

David.

RE: Hanno Pretner OS 61
 

Any idea if this pipe will work with a .61SF?

RG

RE: Hanno Pretner OS 61
 

The number on the case is 4333.
I will post pics tonight.
Thanks

RE: Hanno Pretner OS 61
 

Ralph,

the Hanno pipe is very long - I believe it might be longer than Hatori 750's. Basically designed for even a 13" prop. Actually, I wish I knew what prop Hanno used on his Mystic 60 in '93 on which he used this engine & pipe combination.

I'm sure you could use it on the SF but a 650 or 700 Hatori might do better. It would probably also cost ~1/3 less. A long stroke 10cc quiet pipe from Macs works well too - provided they sort out their service issues...:)

David.

RE: Hanno Pretner OS 61
 

David, I can tell you now it was a MARO prop, but what dimensions, is anyone's guess.

RE: Hanno Pretner OS 61
 

I hate to ask but why is the Hanno going for so much? Is it demand? The YS 60/61 was IMHO a better engine and more of them are out there.

RE: Hanno Pretner OS 61
 

Well,

Ralph I take that back. The Hanno pipe is 18.75" long while the Macs LS quiet pipe is 18.50" long - so just 1/4" longer not the full inch I was expecting. I'm not sure if there have been revised versions of the Hanno pipe that came out later with the Mark II engines. Those may have been between 1/4 - 3/4" longer max I'd imagine.

Here's a snap of my Mark I OS pipe (made by Hatori) beside a 10cc Macs LS QP.

Greg,

see, now I was counting on your having this info! [:@] Just kidding... ;) Well, MARO is a step in the right direction - Swiss props? Austrian props? Self branded?

What do you think of a 13x8 - possible? Will, you've turned these on the Hanno haven't you?

David.

RE: Hanno Pretner OS 61
 

Precisely. Hanno is also a legend so they are a collectors item.

Precisely again. :D More of them means lower cost. They also don't have Hanno's signature so they don't have the cache of the RF "Hanno Special". But a Hanno is also nothing to sneeze at - powerful beast.

David.

RE: Hanno Pretner OS 61
 

Thanks for the info David!

At this point I'm actually leaning towards a Hatori #700 pipe with a #751 header. Haven't had any luck finding either one here in the states. Singapore Hobbies has them though.

I used to run Hatori mufflers all the time back in my heli days and I really liked them. They were very well made and I never had any problems with them! I'm sure their pipes & headers are just as well made.

RG [8D]

RE: Hanno Pretner OS 61
 

Yup!

solid stuff. It's maybe a tad heavier than other brands but definitely robust.

Sounds like a good combination for the UFO.

David.

RE: Hanno Pretner OS 61
 

OK, Hanno flew a 13x11 Maro prop in 1993. I have some Maro Props (but not in that size); they work well, but I still prefer APC props. A 13x8 prop may not be enough load for the Hanno, I'm running a 13x9 on 2 of mine and they are turning around 10,000 rpm. I've run a 13x10 and a 13.5x9, both like a little longer pipe length and the needle setting is a little more critical. The 13x9, 12.5x10 and 12x11 all run nicely on the same pipe length, not too sensitive on the high speed needle and a K&B 1L plug will last 60-80 flights easily.
Ralph, try searching for Hatori USA; their website shows a nice selection of 60 sized pipes and headers.
As for the YS vs OS argument: the only winners are those fortunate enough to own them! I have run all the versions of the rear exhaust OS and YS engines. The YS 60 was the best short-stroke pattern 60 ever made IMHO, however, the OS 61VF was, in many ways, friendlier. The stock YS .61LS (before the AR) was more powerful than the stock OS LS and caused some tuning issues for some pilots who were comfortable with the YS 60. The OS LS with a Performance Specialties piston/sleeve was a beast (I still wish I had kept mine [:o] ), but the Hanno was better. As far as the YS 61AR vs the Hanno Special; they are both comparable in power. The YS and the pressurized fuel system always seem to require a bit more maintenance than the Hanno.
The were only about 8000 Hanno Specials made (at most - I've never seen a serial number between 5000 and 5,999; so maybe only 7,000) and I suspect there were fewer YS 61ARs made - they came after the Hanno and YS was already strongly committed to their 4-stroke engines which quickly became the powerplant of choice in the pattern community.

RE: Hanno Pretner OS 61
 

I have a 12 x 11 for my hanno (APC) so it's good news that it'll work well with that prop.

All I need to do is build an airframe around it.

*looks at joker kit* do I or don't I?

RE: Hanno Pretner OS 61
 

Here are a couple pics of the OS.
If someone is interested - make me an offer.
I plan on putting it on ebay in a couple days.

http://i1000.photobucket.com/albums/...h_DSCF0422.jpg


http://i1000.photobucket.com/albums/...h_DSCF0423.jpg