babbott78

very nice!!

babbott78

i wasn’t aware there was a jett piston liner set? How do you get them? I’ve got the Brian Gardner one

bjr_93tz

Silly me got some names mixed up, it was in 2008 and it was made by Henry Nelson. It's an AAC liner so it's much lighter than an ABC one. I think the port timing might be tweaked too (for better or worse?) and whatever other "improvements" they claimed necessary.

So not just a reverse engineered clone (again, for better or worse?). I've never run it..

https://www.rcuniverse.com/forum/cla...iner-sets.html

babbott78

the Nelson ones are supposed to be good! Wish I had have grabbed one. The Brian Gardener ones look good too, but are ABC, they are also tweaked and not an exact copy.

Would love to see your Slingshot flying!

bjr_93tz

Apologies for the video quality, it's the only video I have of it I ripped from a Hi8 camera years back. Built it in '92, competed '93 and '94, video taken in taken in 2005. Dad was just tooling around with it but he did give it the berries at the 3min mark. Probably had the 12x11apc on it and 5% nitro, about 1500ft elevation and it clearly didn't have unlimited vertical despite the low weight. We never tuned it to the ragged edge and flogged it with big nitro percentages for weekend flying.

babbott78

Pump kits are now being shipped, and they are quality!! Camilo has done a fantastic job

Brice2

Hi babbot78,
I have a Hanno Special I that I want to revive. I would like to purchase one of those kits.
Are they still available and who do I contact ?
I live in Canada.
Thanks

babbott78

no problem, if you reach out to Camilo on rcgroups (you will see the hanno pump thread), you should be able to grab a pump kit.

Brice2

Thanks Babbot78.
Good news.
Enjoy your flying season.

babbott78

hope you get the Hanno going!! Myself and my really good friend Ben, just got into F3A with our 1991 Lotus 5’s running Hanno’s, so they can still perform

Brice2

I wish we had some F3A fliers up here in Canada. Unfortunately, it is pretty dead.
This engine was in an Aurora, built in 1989 and lost in 2012 due to the right aileron jamming to one side in mid air.
t has had at least 1200 flawless flights.
Unfortunately, it sat in the garage for about 10 years without running.
After priming it, it started right away, idled beautifully but would not hold full throttle. (No bearing problems !)
This is why I suspect the membrane in the pump.
It brings back a lot of memories.
Enjoy your F3As.
Brice

flywilly

My Feedback: (121)

Hi Brice,
At full throttle did the engine surge, die or run erratically? A few things to try while you wait for your pump rebuild kit:
1) take the fuel line off the carb, but leave attached to the pump. Gently fill the pump with fuel through the inlet nipple until it drips from the line to the carb, then attach the carb line to the inlet nipple (closed loop) and let the pump ‘soak’ for a few days. Flush and try running again.
2) make sure all the head bolts and especially the back plate bolts are tight.
3) remove the backplate pump and check for clogs/ gum in the pump holes in the backplate.
4) check/ replace the needle valve ‘O’ ring.
I’ve run Hannos for 30 years (more than 7,000 logged flights), including several that I acquired used and have always managed to use the original pump. Of course, there was no rebuild option as OS did not sell pump replacement parts.
Good luck with your engine! The Hanno is one of my all time favorites, especially with a Nelson or Gardner piston/ sleeve.
Will

Brice2

Hi Will,
This engine idles very well and run without missing a bit up to about 75% of max throttle. When the throttle is finally wide open, the engine cuts out cleanly after a second or so. It will not carry on running even if the throttle is rapidly closed and re-opened somewhat. When the glow battery is reconnected, it will start again at the first flip of the prop. This is why I think that it is the membrane of the pump.
I took the carb apart and changed the "O" rings. I had bought a lot of carb parts 12-15 years ago, but nothing was available for the pumps.
Thanks for your advice. I will definitely try to clear the gum out of the pump.
Have a good weekend.

Brice2

Hi again Will,
Problem solved !
I had forgotten one thing :
When a standard RC engine is too lean at WOT, it will slow down, heat up like crazy and eventually cut out. When it is too rich it will sputter and again cut out.
With a pump engine, when it is way to rich, it will just die out straight away.
When I cleaned the carb, I replaced the main needle valve at 2 1/2 turns. I found my notes and on this carb, it is supposed to be between 1/2 and 3/4 turn.
I cleared the pump as discussed and tried it again with the correct needle setting.
Voila !
Sweet transition and about 10200 rpm with a 13x9 APC pattern.

Thanks for your help.

Now I just have to build a new pattern plane. Ouch..................

flywilly

My Feedback: (121)

Great news! 10,200 on an APC 13x9 is right on the money.
Hopefully you have a kit in your ‘stash’. There are quite a few kits available. Hangar One has some nice choices. There’s always scratch building.
Good luck!

ehsanmorshedi

Hi all,
What is the difference between these two pump units?

one is on Hanno Special and the other is on 61 SF-P

flywilly

My Feedback: (121)

The older version on the SF has a return line for excess fuel from the carb to the pump, and then from the pump to the fuel tank. Mine worked great, but too much plumbing for my taste. I much prefer the simplicity of the two line (1 in from the tank; 1 out to the carb) version developed for the Hanno.
Both engines look brand new, very nice! What is the serial number on the Hanno?
will

ehsanmorshedi

Hanno’s serial number could be seen in the i

mage

ehsanmorshedi

ehsanmorshedi

I own a RF 61 (not pumped) as well and was thinking what if I change the RF 61 simple back plate and carb with the SF’s ( pumped).

and also change the original RF piston/liner with a set of new Hanno type one with the same port size and timing.

the only thing that I don’t know is the similarity of the crank rotary valve size and shape on the RF and Hanno.

this way the simple RF will be modified to a Hanno Special specifications and performance.

What do you think?🤔

flywilly

My Feedback: (121)

Yes, that will work and you will get Hanno performance from the RF. The big difference between the stock RF and the Hanno was an increase in exhaust duration (6 degrees more for the Hanno. The RF-P (pre-Hanno) got some performance boost from the larger carb throat of the pump carb, but nothing like the increase in the exhaust port size. I have tried running the larger (butterfly) carb and pump on the Hanno, hoping for a little performance boost over the stock Hanno pump/carb, but saw no improvement in the air.
Will