Franklin Engines

Franklin Engines

Has anybody had anything to do with the Franklin engine conversion in 172's.
What sort of performance could you expect and what sort of fuel flow?
There is a gross weight increase with the conversion, does the new engine increase the empty weight by the gain?
How does the Franklin machine compare with an XP?
Hope some of you can help,
                                       thanks  SP

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Re: Franklin Engines

I have a 172G that has had a Franklin in it since 1966. Rather than rebuild it I put a PZL factory new engine in it in 1998.

I cruise at about 150MPH at 8,000 ft. Burn aobut 10.5 GPH.

I put a preoiler on it and a graphic engine monitor with egt and cht for all 6 cylinders and an oil filter. Damn, it's a great conversion. Off the ground quick, 1500 feet per minute climb at sea level. I've had it to 15,500 feet and a previous owner had it to 19,000 feet.

I fly about 2 hours twenty minutes and stop for fuel as it has the original 36 gal fuel capacity. Good safety management. Cross country and over the Rocky Mountains easily. I left L.A. at 10AM and was in Seattle in my house at 6PM. Two fuel stops.

Short field performance is outrageous. It is only 10 HP less than a 182 but weighs 700 pounds less. There is a weight increase but I don't know exactly how much. It really hasn't been a factor as the 220 HP really makes a 172 into a real airplane.

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Re: Franklin Engines

I have a 1963 172-D with a 220 hp. PZL  from 1996. I fly with edo 2440 floats & a sportman stol kit.  I have better take off performance than a 180 on floats. We fly at about the same speed.

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Re: Franklin Engines

Thanks for the replies Sam and Buck, would you blokes have access to your empty weight's without going to the aircraft? Does the Franklin conversion have the increased gross?

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Re: Franklin Engines

I heard that PZL ceased production of new Franklins a year or so ago, so nobody makes them now. Also, that there is a problem with spare parts.

Can anyone substantiate or dispute this?

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Re: Franklin Engines

I was also interested in this. I saw a company who specialize in Franklin engines and contacted them for the engine, but they also didn't have one at the time I contacted. It's gonna be a long wait for this Franklin engine to get.

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Re: Franklin Engines

A friend of mine has one.
He told me that tech support and spares  are almost non-existent.
To me, that is a major detail!

Tony
C-GICE

Jae Hwang wrote:

> I was also interested in this. I saw a company who specialize
> in Franklin engines and contacted them for the engine, but they
> also didn't have one at the time I contacted. It's gonna be a
> long wait for this Franklin engine to get.

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Re: Franklin Engines

The big franklin is one of the nicest sounding engines.Do the gauges still go backwards?

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Re: Franklin Engines

Owning a franklin means if the crap hits the fan, which seems more then often in a Franklin, then you cant just go to the local shop and order up a new jug.

I owned a 172 with franklin and aqua 2400 floats, it was a great bird when it was running, but ended up replacing two jugs in it (1100 hours on engine), ended up selling it a few years latered, upgraded to a 67' 180H which does just as good and you can get parts because its pretty much interchangable with every 180 and 185 out there today.

Back to my orginal paragraph, you really have to be in that 'group' of franklin owners, i often got my jugs out of Franklin Engines in CO and a guy in FL i think it was....he was pretty old and not sure if he still does parts (seemed it was a hobby of his)

One thing i noticed was my franklin hated normal unleaded, even mixed....when a cylinder blew, it blew hard (quarter sized holes though piston)

But it could take a load! living in Alaska, we do alot of big game hunting, i was able to take roughly a half of a moose and guy off no problem.

Would i ever buy a plane with frankin again? prob not simply because of the parts factor. Unless the price of parts on these engines go down and more parts are readily avail, i am sticking to cont/lycom

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Re: Franklin Engines

Gary,

Maybe your engine problems were related to the fuel you were using or your mixed fuel experiment..."One thing i noticed was my franklin hated normal unleaded, even mixed." 

The 220 hp Franklin requires 100LL due to its compression ratio.  By you using mixed fuel, you lowered the octane rating and thus created detonation problems.  I guess that explains the "quarter sized holes though piston."

An expensive lesson learned in experimenting with fuel.


Bob



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Re: Franklin Engines

Parts are still available and the engines are superb performers....and, Bob, ya beat me to it i.e. the "unleaded fuel" comment. Quickest way to grenade a high compression 10.5:1 6A-350-C1R is to but QuickieMart Regular Unleaded in it....sheesh!

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Re: Franklin Engines

  I own a 175 with a 220 pzl Franklin Its a rocket and the CHTs never run over 225 degrees F' because the cylinders are ALL alum. with no screw on heads like a cont. or a lyc. the Franklin was resigned for helios and was the only engine that could take the heat of a helio. my 175 flys as fast as a 182 and burns way less fuel.

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Re: Franklin Engines

My understanding of the franklin cylinders is that they are aluminum, but have a steel sleave inside the aluminum. This is the way heavy duty diesel engine are made.
The piston rides up and done inside the steel sleave.

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Re: Franklin Engines

I'm considering converting m 1960 C-175A to a Franklin 220. Is itstill possible to get spare pats? How about an engine mount? These used to be avaiable thru Franklin in Colorado, but are they still?

Steve Maher
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
San Diego, CA

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Re: Franklin Engines

You might want to ask some of the members of "The Skylark Association" http://www.cessna175.org/
Someone there might know.

Paul Rhyn
Itenhardstrasse 13, Grenchen 5620 Switzerland
Email This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Year / Model  1959 175 Franklin 215 HP (6A-350-C2)
Tail Number HB-CMC

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Re: Franklin Engines

According to quite credible rumours tooling has been acquired by a group of people in the US from PZL in Poland. It is said that spare parts should be available in 2006. Even the option of producing new engines is considered. Keep fingers crossed that these plans will materialize.
Paul

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Re: Franklin Engines

I had a complete overhaul of a 220hp PZL this past summer.
I live in Anchorage, there are lots of Franklins here. Hard to get anyone to work on them. there seems to be parts available the people who know Franklins. All my parts had to be rebuilt cost over $20,000. You could buy a new engine for about $15,000 a couple of years ago. I hope someone starts making the engines again. The performance on floats is great I just hope this one lasts another 1,000 hrs.

Allen Bingham
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Re: Franklin Engines

I wish someone would please contact me on some type of info about this conversion. I have a 63 172 and would love to try a new engine, my o300 is just not a good performance engine. Its time for overhaul, and I would love the performance, whether its the franklin or the 180 hp

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Re: Franklin Engines

The Go-to man these days seems to be Bruce Kown with Classic Aire in Georgia. I have spoken with Bruce on multiple occasions and he has been representing the Polish interests in the US at the last couple Sun N Funs. Also, there is a shop near me here in Oklahoma (Pauls Valley) that is friends with Bruce and they overhaul over 50 Franklin Engines a year. I have visited the shop and looked at their operation myself.

K. Erik Hoopes
Cessna 175 & Skylark Club
www.cessna175.org

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Re: Franklin Engines

Do you have a name and phone number of the shop near you in Oklahoma?  I certainly would be interested in talking with them about a future overhaul.  Thanks!

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Re: Franklin Engines

Greg Lucas is the guy in Pauls Valley but he has announced that he is not going to build engines anymore. You find his web site on Hanger 9 Aeroworks. I will have a engine mount and baffeling for sale for the cessna conv. I have bought a 180 HP Franklin firewall foward to put on my Stinson so I wont need the mount or baffeling for the Cessna.My email is This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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Re: Franklin Engines

I have a 6 cyl Franklin was being ean on air boat has wooden prop that would be cool as wall hanger does anyone have an idea what one is worth was running fine boat was condimmed.

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Re: Franklin Engines

I was just scanning this site and since I'm not mentioned I thought I would respond.I hope this gets the word out.I've been rebuilding Franklin engines (and cylinders) for over 30 years.I originally was at San Fernando Airport (CA) then moved to Oregon for several years.I am presently located in TX, phone is 903-626-6787. Contact me with any questions.

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Re: Franklin Engines

Hello great site just wondering if anyone knew of a cessna owner with a Franklin 6AS-350-A Turbo in it. If so can you please email me or call me.

Thanks
Albert
7862513449

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Re: Franklin Engines

I am interested in a possible application of the Franklin M4A-235-B31 for my Cessna 150D aircraft.  Does anyone have any information regarding the reliability of that engine?  I know that there is no STC to date, but am particularily interested in pursuing one should the product support and reliability be there.  Any info that anyone might have about this engine, I would greatly appreciate.  Thanks.

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