Bax

My Feedback: (11)

This will work, though we never ran the engine with more than 15% nitro. 25% may be a bit high, and you may need to make and add another cylinder head gasket to reduce the compression a bit. We can only say "try and see" regarding the fuel. The prop and Hanno pipe will work together, but expect the RPM to be closer to 10K since it's an 11 and not a 12 pitch.

flywilly

My Feedback: (121)

Hey guys,
I only ran 25% in my Hannos when the temp got high and the air density low (like 95F and humid). The engine ran perfectly and the extra nitro just provided the performance (airplane 'feel') of cooler weather. The Hanno runs great on 10-15%.
As an aside to the inquiry about OS building more Hannos: Dave Shadel built 50 matched piston and liner sets based on informal pre-orders. He couldn't even sell those 50 (some guys never followed through) which is how NAVDAV was able to get some. The orginal Hannos (MKI) probably had less than 10,000 produced - based on the serial numbers I've seen, I'm thinking around 7,500 - 8,000. The Hanno MKII (both versions: ringed and ABC) maybe had 4,000 produced (if that) as they arrived when the YS 1.20AC was king and 2-stroke 60s just weren't considered competitive. The demand today is probably miniscule - maybe 100-150 at best.
Personally, I think the Hanno Special was the best rear exhaust 61 produced (especially with a Shadel piston/liner). I'd like to run the ringed version of the MKII as I think it would be an excellent engine (as is the 1.40RX).
Happy flying,
Will B.

bklearjet

Flew today and had great results. The 12/11 prop and 25% nitro gave me a consistant 11,200 rpm's. I would like to get the RPM's down a bit though since the overall opinion is run about 9500 rpm's, so I wil be trying other props. This is a 40-size a/c, so prop clearance is an issue if I go to 13 inch props. Does anyone know if they make props where pitch is greater than length? i.e. 12/13 or 12/14

Thanks for all the help. BTW I think I was hitting about 130+ mph! WOO HOO !!!

Bobby

flywilly

My Feedback: (121)

Hi Bobby,
I know I still have an APC 12x12 and an APC 12x13 NIP somewhere in my workshop if they aren't available commercially anymore.
-Will B

Atlanta 60

My Feedback: (18)

I sure hope APC Props are still available!! I need some too...I was planning to give them a shout within the next week or so...The have an extensive list on their website...It looks like you can order straight from them which is what I planned to do...I havn't tried yet though...
Links:
http://www.apcprop.com/
http://www.apcprop.com/html/prop_list.html
http://www.apcprop.com/cgi-bin/store/agora.cgi

I see 12x14 60 Pattern style prop on their list..It looks like it jumps from 12x12 to 12x14 though...


Looks like Central Hobbies still carries APC Props in "Our" sizes also...Same price as the APC site...So I may call them instead cause I want some Tetra wheels and tanks also..he he
http://centralhobbies.com/

Central even lists a 12x13 60 Pattern prop on their site...Humm..I may have overlooked that on the APC site?? So it looks like you may be able to get pretty much what you need..Huh...

Have Fun...

Chuck

colinandteresa

My Feedback: (3)

Hi, Can anyone tell me the difference between the mk1 and 11, also is there any performance difference between the ringed and abc. John

speed-panzer

My Feedback: (1)

Same question from me - I cannot tell from outside difference between the MKI and the MKII. There may be little difference in timing?
I had chance to ask Hanno Prettner himself about 2 years ago, he told that in his eyes the MKI had a little more power, but he did not explain why he believes this is so.
MKI was available as ABC only, MKII both ABC and with ringed piston. Could it be OS made the MKII in ringed version, since there have been some problems with the cylinder nickel plating peeling off?

Atlanta 60

My Feedback: (18)

I asked this same question a while back...Here is the thread with allot of good information...Hope this helps:
http://www.rcuniverse.com/forum/m_6745987/tm.htm

speed-panzer

My Feedback: (1)

Wow, such amount of related information - I´ll have to read it over the weekend. Wasn´t aware there has been such discussion already.
thanks

nxtdoor

My Feedback: (10)

I just purchased an OS 61 RF-P and would like to know how it would compare to the Hannos in performance. What were the typical props used on them?

Thanks.

Jeff

bklearjet

Hey there everyone! I haven't flown the F-20 for about 3 months. But I can tell you this for your tuning and flying needs. My Hanno 61 has the red OS pipe attached, but I have never tuned it. i.e. cut the header. I have the orig rear header and it is coupled to the red pipe. I tried the 12/12 prop once but it wouldn't pull up on power on the test stand, so nevermind trying to fly with that set up. I have been running the 12/11 since July of 2007, and it performes wery well with 25% nitro. I even finger start this, as I do with all of my planes. The only problems I have is getting it dialed in correctly with changes in temp and pressure. The high end is rather finicky, it's like one click in = too lean, or one click out = too rich. I'll fly on the rich side as not to burn up plugs or the engine. I accept that it is hessitant on throttle up in flight, and I fly with that in mind. I just use gentle throttle adjustments when powering up to prevent a sudden flood and an eventual deadstick. On final approach, I bump it a few times gently to keep it in the sweet spot in case a go-around is needed. As far as the low end, OMG what a ****ty set-up! An oblong cam that you adjust. Seen much better low-end adjustment set-ups. This is the biggest problem I have. But I have learned not to **** with it once it is set up right, regardless of temp or pressure. I'll just play with the high end, get it right and fly. Hence the bumping throttle on final approach cause I am so weary of the low end. Hope that helps ya a bit.

Bobby

Atlanta 60

My Feedback: (18)

bklearjet ...There is no need to have that engine running like that unless something is wrong with the engine (ie: damaged components such as a scored cylinder from dirt ingestion or peeling liner, bad o-rings, bad bearings something like that)...

That Hanno should be a super reliable engine able to turn a 12x12 APC with authority....I'd go as far as saying it's a Joy to run...

I'll start by saying your Pipe is too short...The "hypersensitive needle" is a dead give away...From my experience..The stock OS header wasn't long enough to set my Hatori 650 or Bolly pipe where I needed it for a Hanno...I posted a photo below of how I choose to remedy that situation...The short piece of tubing is the part of the factory tubing I first cut off...I added a longer piece of tubing via a silicone coupler...The other photo is the end result

There are a couple needle valves supplied with a Hanno engine...I like the one with the more blunt tip...The sharp pointed tip is a little too twitchy for my tastes..

Since the "Red Hanno Pipe" isn't always the same pipe I'd suggest this...Take a length of music wire or 1/4" dowel and stick it into your pipe till it hits the first baffle....mark that distance and pull it out and make a mark on the outside of the pipe with a grease pencil or whatever....Set your initial pipe length to approximately 20" measured from the glow plug to that mark (the first baffle)...Then you could tune from there for your particular fuel, prop and atmosphere...I'm setting at 19.7" for a nice conservative tune....I'll gain a couple hundred RPM's by shortening a little more but it's not worth it to me personally...I have a good needle adjustment range...Idle and transition is rock solid...I'm turning a little more RPM than I want with a 12x12 APC...I think I'm gonna switch to a 12x12.5 Wide prop when I buy some more...I ultimately wanna get the RPM's in the 9500 range for the Hanno's...

As far as your Low End and Transition....A couple of suggestions may be:
1) If the engine has some hours on it..put a set of bearings in her...Same suggestion if it's been sitting a long time...
2) Change the Mixture Control Valve o-rings (See Diagram below)

Tower Hobbies webpage for the 6P carb:
http://www3.towerhobbies.com/cgi-bin...I=OSMG2427&P=Z

Remember: Never use petroleum based products in these engines!! (ie: after run oil or storage oil ect..)



nxtdoor

The RF-P is an excellent engine!! It will turn up a little more than the Hanno....I shoot for 10.5-11.5K RPM which is apparently it's happy spot...A prop range would be APC 12x8 to 12x10...The Hanno is a tad more powerful and designed to swing a bit more prop at a lower RPM...I believe the Hanno was designed like that to help keep the noise down back in the day...Both are very fun engines to play with!! I just got my first "never run" RF-P...All my others have been used engines...I put a Shadel Piston/liner in earlier today and just got finished running it a little while ago...What Fun!!

Hope You Enjoy!!

Chuck

flywilly

My Feedback: (121)

The carb throat in the OS RF-ABC-P is a lot bigger than the one in the Hanno. The Hanno doesn't really like to turn over 11,000 and 9,500 - 10,000 rpm is probably ideal. The Hanno will run nicely at lower rpm (down to about 9,000 peak), but the needle gets a little sensitive (that was with an APC 13x11 - I now use 12x11, 12.5x11, 13x9, 13x10). My favorite prop with the RF-P was an APC 12x10 (with the stock piston/sleeve). The Shadel (performance specialties) piston/sleeve (the pre-hanno version) added some signficant rpm so I preferred an APC 12x10W or 12x11.
-Will Bartlett

davidckyr7

I tuned my hanno on a typhoon 900 to 12 500 with a 12 - 8 PROP AND USING 10 NITRO IT RAN COOL AND TURNED UP TRANSITION WAS GREAT MOVE THE PIPE A quarter of an inch increments until it comes up on the pipe it makes a huge difference in performance.

dhal22

7 yr bump, not a record but still......

davidckyr7

I know what the heck did u ever figure out your address so I can send payment for the hanno 61 I'm bandit 71 on rcgroups

dhal22

I've emailed my address more than once. I will email again.

davidckyr7

I've never got it [email protected]

dhal22

Resent.

babbott78

Thought I’d bump this thread up again

Took my Lotus 5 out a few weeks for a fly with the OS61 Hanno and Bolly EQ63 pipe (12.5x11.5 Bolly prop, 10% nitro).

Flew brilliantly! Beautiful engine and combo with this plane. Always looking for spares just in case.

bjr_93tz

Please stop posting those pictures. You're making we want to clean up my SlingShot and give it a run.

babbott78

that’s a stunning Slingshot as well!!! Still got it with the Hanno? That VH number is a low one!! Very nice

bjr_93tz

Yes, I've been in the game for a few years now. Was about 7.25lbs at the time, super light and I wouldn't do a snap roll with it anymore. Still with Hanno, but the pump has 140RX pump swap. It's still running on the replacement piston/liner after the original peeled but it doesn't run very often. I did get one of those Jett piston/liner and two of the ones from Graham Gardener(?).

I probably should have jumped into the pump kit that was being offered a while back, but it's really been tucked away out of sight out of mid...

TheEdge

My Feedback: (788)

Great to see this thread gain some new material.

Sharing this rare motor that I saw listed which may be of interest to some on here.

https://www.ebay.com/itm/144644742458

babbott78

the pump kit should still be available? He hasn’t shipped any yet. That’s a super light slingshot!!! Would fly amazing!! Mk mechanical retracts? Does the 140RX pump work well with the Hanno?