Engine upgrade

[Acroeric]

Re: Engine upgrade

Tribe- I applied for a STC for the installation of a C85-8 series engine in a BC12D, BCS12D, BC12-D1, and BCS12-D1 today. I will keep everyone informed as to the status. The way I applied maintains the current weight, fuel, engine mount, fuel system, prop etc. (no wing fitting changes either)The only modification requested is to allow the exhaust to be modified to fit the slightly different dimensions of the cylinders. I have an airplane in the modified configuration available for conformity but it is still going to be tough to make it all happen. I will keep everyone informed as to the status. My target date for completion is July '05. If anyone thinks they may be interested please let me know. It has already cost me a good bit and I am sure that after all drawings are entered into CAD and several trips are made to my nearest ACO I will be in to it for several thousand dollars. . . .Anyway- I plan to stick this one out as it is much needed.

[Garry Crookham]

Re: Engine upgrade

Eric:
Thanks for moving forward on this......I'll be glad to contribute $$....let me know where to send the funds.

Garry Crookham
N5112M
Tulsa

[paulp]

Re: Engine upgrade

Eric,

Good job! Just let me know & I will be happy to contribute toward this worthy endevor.

By the way, when are you going to be in OKC next? Got a little over 60 hrs on the mod 19. Next time your here we'll go to Bob's BBQ in ADA. Nice trip and great BBQ!!!

[Acroeric]

Re: Engine upgrade

Paul- I will be there Febuary 1-4. I will look you up when I get there. Good to hear you are flying it-

Also- thanks guys for the offers to help. I am going to see how it goes- I will definately scream if I get in over my head.

[Yellow Duck]

Re: Engine upgrade

I will also be interested. Keep us posted as to cost. If we get enough, it shouldn't cost that much per each.

[Acroeric]

Re: Engine upgrade

Guys- I spoke with the ACO today and feel pretty good about the STC. I have requested the most knowlegable antique aircraft guy in the office to be the project manager. I have another conference tomorrow so I will know more about the timing. Again- I tried to keep it simple with no changes except the engine and small mods to stock exhaust.

My last BC12-D had the C85 and it performed great. . .even somewhere over 1200.

Does anyone know if this has been attempted before? Forrest?

[Robert Lees]

Re: Engine upgrade

Eric: minor changes will be required to the baffles too, to get them to fit.

Exhaust, as you say, will need fettling to fit too.

Fuel flow check (150% of max rpm flow rate)

[AKTcrafter]

Re: Engine upgrade

I've been looking with interest at the posts regarding upgrading the engine to an O-200 and wanted to share some information that might be of assistance. I am buying a Model 19 conversion that has an O-200 w/ electrics that's been installed under a separate field approval. The Model 19 STC was accomplished first. The simple way that they got this one approved was to use the motor mount and exhaust system from an F-19. Also required was to placard the nose tank as being only 9 gallons usable rather than the 12 that it actually holds. I was told that the reason for this limitation is that w/ the increased horsepower high enough deck angles are possible during climb to cause fuel starvation when operating w/ less than 3 gallons in the tank, hence the 9 gallon limit.The F-19 is placarded in the same way. I also have a Field Approval to use the C-150 exhaust system on the O-200 conversion. This mod gives MUCH better cabin and carb heat than the rather poorly thought out TCraft exhaust system as well as allowing exhaust maintenance without being required to remove the engine or loosen the mount. I'm pretty certain that I've seen this one installed on quite a few 85hp Tcrafts as well. I wouldn't think of going to the trouble of getting the O-200 approved without using the 150 exhaust. It's a really good change to have, especially if you live in colder climates. I know that some of you purist types will cringe at the thought of all of these mods but the improvement in utility that they allow is far more important to me than remaining true to the the stock Tcraft.
This plane has quite a few mods and I'd be happy to share copies of 337's if any of you feel that the previously approved documentation might make your modifications go over easier w/ the Feds. It may muddy the waters a bit since my plane has been converted to the MOdel 19 and is not a stock BC12D. If you were not trying to change any weight limitations the modified status of my plane might not be a factor in allowing you to use my "previously approved data." I have paperwork for 8.50x6.00 tires, 26" Good Year Tundra Tires, Edo 1320's on the Model 19, and other stuff too. I'm interested in changing to straight axles and hydraulic brakes so any advice on that subject would be greatly appreciated. Goodbye from chilly Alaska!

Roger Clyne

[matsuthunder200]

Re: Engine upgrade

It was very easy to go to the straight axles. I just bought the f 19 gear legs and had them bolted on after having the ske brace welded in. as far as the brakes i just upgraded to the cleavland shoe brakes they are still cable opperated but work way better than the shinns. It was easy to get them app, with a 337..

[paulp]

Re: Engine upgrade

Howdy Roger,

I just finished converting my BC12-D to a mod 19 using the Harer STC. I also did the 0200 STC for the 85hp TCM. Overall, I am very pleased with the outcome except for the exhaust system. I am using the F19 exhaust. I have an almost new set of Hanlon-wilsons, with the heat muffs, but in order to use them, I will have to modify the cowling and I don't know if I want to do that. Any info on utilizing the 150 exhaust system and avoiding the cowl mods would be much appreciated.

Thanks much.

[crispy critter]

Re: Engine upgrade

I heard about a guy trimming the front corners off the Hanlon-Wilson's and fitting them inside the cowl of a stock T-craft with a C-85-8.I didn't get a chance to see it but was told about it by several people.

[Marcus Bates Jr]

Re: Engine upgrade

Also, guys, remember that a 0-200 or the hopped up C-85 will fit in a stock cowl if there is no starter used. ....I have never had a problem with a wind generator, or even with today's technology, a solar panel. Many of the mods that make sense have been made in the past and paperwork is available if we contact the right people and have a "real aviation person" as our FAA rep. ......Marcus

[Acroeric]

Re: Engine upgrade

I installed a Luscombe 8E exhaust in a BC12-D C85 installation with no cowl mod except a hole for the 2nd exit. It is a little louder but I think the reduced back pressure gives a little more power.
Eric

[paulp]

Re: Engine upgrade

Crispy,

I had heard the same thing but after talking to my A&P/AI he said that a mod to the mufflers would probably never fly.(no pun intended)

Eric,
Before we got N39203 in the air, I stuck on the stacks from a Luscombe. Too loud for me. If the financial burden gets too heavy, let me know. Be glad to help.

Marcus, I think your right. There is a bunch of stuff out there if we can find it! And you are correct about the fit for the original cowl; however, you loose the starter & elect. system which I think most folks want.

[AKTcrafter]

Re: Engine upgrade

Paul asked about the 150 exhaust and cowl mods so I looked at the Field Approval that I have and it says "Installed exhaust system from a Cessna Model 150 aircraft. Rerouted fuel line to give adequate clearance from exhaust. Cut out front of cowling to clear mufflers and covered with aluminum fairings." That's all that it says, not even a part number referenced for either the mufflers or heat muffs! This one was signed off here in Alaska back in 96. I suspect that it would at least require a more detailed description of the work done to get it by the FAA at the present time. You do end up with two "bumps" in the lower cowl that I've seen covered in a variety of manners but it's not that much different that the "bumps" on top to clear the spark plugs/wires. You also must cut out a new hole(s) for the two exhaust stacks to exit the cowling. I don't think either of them lines up w/ the original exhaust hole so you have to patch that one as well. My cowlings are a little tired so I'd like to get a new F-19 cowl from the factory but they haven't been able or at least willing to answer my emails so I guess I'll have to call them.

Roger