O-200 in BC12D; Motor Mount

[VictorBravo]

Re: O-200 in BC12D; Motor Mount

Rob I got it!! Make a "flange extension" out of aluminum. A strip that is about three inches wide with a joggle, shaped and pounded so that it fits between the nose bowl and the front of your upper/lower cowlings. The "higher" side of the joggle sits on the nose bowl mounting flange and attaches with new DZUS fasteners into the old holes in the nose bowl. The existing upper and lower cowlings sit on top of the "lower" part of the new flange extension strip, and mount with the old DZUS fasteners that are in the cowlings, into new holes in the flange strip. This would give you the two inches extra room for the O-200, and would allow you to put a small spacer between the engine and the mount to solve the firewall clearance issue. It would only require a very small prop extension. No permanent mods anywhere, no mods to your original sheet metal, and almost imperceptible on the airplane. It might also be less offensive to the CAA.

[Robert Lees]

Re: O-200 in BC12D; Motor Mount

Vincent: is it on the short mount? If so, how did you alter the Lord lugs on the O-200 to fit to the short mount?

Did you make a new mount? Sorry to be so vague, but I am still learning what is required to fit a non-electric O-200 on a short mount, and still fit within the existing B model cowl.

Regards,
Rob

[dedrekon]

Re: O-200 in BC12D; Motor Mount

I'm not sure which mount it's on. It was done in 1975, long before it came to me. Based on the mount for my 65hp in the other T, it's the long mount. It looks like there would be plenty of room for accessories between the case and the firewall. The cowling was stolen.....so I have to come up with one or manufacture one for it.

Vincent

[Ragwing nut]

Re: O-200 in BC12D; Motor Mount

C-90 and O-200 are identical except for camshaft, carburetor, data plate, and maybe the oil tank depending on airframe installation. I have seen machined adapters installed into O-200's to accept original conical rubber. Since your engine is a pile of parts and you do not want to use electrics, why not sell off the case, mags, cam, and carb and buy the necessary parts to build it as a C-90-8?

Mike

[jason packham]

Re: O-200 in BC12D; Motor Mount

Have 0 200 on short mount with machined adapters .Like casseut racer,top cowl is 1 inch longer 22inches.With sky tek starter and slick mags.Using stock oil tank from 0 200 with pilot side back bracket remove.Also had to massage tank by engine mount tube.Engine is very close to #4 cly on front cowl.Using fiberglass nose bowl from wag aero.Exhaust is two seprate sides coming down to centre of plane.The factory exhaust would require added pipe in centre.will try to send pic or goto c-fggz album.also will add more shots thanks

[Acroeric]

Re: O-200 in BC12D; Motor Mount

Rob- N43740 (standard airworthiness certificite / swick stc) had the short mount and 0-200 installed and it fit fine. Send me your e-mail address and I will send you all the photos I had. I had plenty of room for the Slick mags etc. From a structural point- it held fine at +6 / -3 G and doing snap rolls ;-)

[flyguy]

Re: O-200 in BC12D; Motor Mount

I have a -85 on the short mount. If there are any measurements, like tubing diameter, or whatever that I can make for you, let me know. The front left plug can on mine is actually under the edge of the nose bowl, and I have to put a rubber pad under it to prevent chaffing. The Eisemanns were so close to the firewall that I put dents in the fw to make sure they cleared. Bendix mags would have a lot more clearance, but I like the Eisemanns.
Darryl

[Dano"T"]

Re: O-200 in BC12D; Motor Mount

I have 3/4" between the slicks and the firewall on the C-90-12F.

[NY86]

Re: O-200 in BC12D; Motor Mount

I have seen machined adapters installed into O-200's to accept original conical rubber.

Any one got any info, photos, etc. on these adapters?

[Dick Smith]

Re: O-200 in BC12D; Motor Mount

John, you might try contacting the guy (Ralph) at the bottom of this caption:

MORE INFO RE: O-200 ON A C-85 MOUNT...(010401)
From: Terry Straker
Subject: Re: January #3 GTS Internet Update
Denis- You may pass along that The Luscombe people use those cone inserts to install O-200's on C-85 mounts, so they may have them made up and some sort of paperwork available. I know when I was flying a Luscombe they published detailed plans on how to make the cones in the newsletter and that several guys were flying with O-200's installed. Now that The Luscombe Foundation is trying to go back into production and are rebuilding Luscombes, perhaps they would be a source for those cones. I could probably dig up that old newsletter as well if necessary to see a 1-A fly again. Terry Straker

(Editor says... Mark Holliday email'd Jim Montague who email'd me to say that the mount adapters are $294. Call 650-493-6916 and ask for Ralph.)
Dick

[Eric Tyson]

Re: O-200 in BC12D; Motor Mount

I am building a new FWF for a zero time engine, I am adding a light weight electrical system. They started making a new baffling set(mine is in getting powdercoated) I am using a new cowling, and all new sheet metal- the cowl it is estamated to take 45hrs to build and it is the second tcart cowl this winter.

For the extended mount, if you do a serch on this org website you will find a picture of the f 19 mount that has vertical bracing, I am trying to attach some pics of one in Fairbanks.

The mount I am using doesn't have the vertical bracing, it is for the C85/90.

Also it will make it easier going from the tapered crank to the flanged crank, that is what my guy said.

My cowl/baffling, electrical system, oil cooler system is estimated to be $7,500.
Everything is hand made but she will be good for another 65 YEARS

Eric

[astjp2]

Re: O-200 in BC12D; Motor Mount

Its actually 5/8" for the lord mount to move the prop flange foreward. The only problem I had was to make the left front baffle a little different to clear the nose bowl. Tim

It adds an inch(1 inch) to the length. Rob,the are made of the same tubing, in fact the 0200 long mount has the same size tubing and less bracing over a longer distance.

[swoeric]

Re: O-200 in BC12D; Motor Mount

bumping this thread.... i came across it while searching for info on plug installation angle and BY vs E plugs this should maybe become a sticky for the 200 on mounts question
can we create stickies or another thread section of very informative ones based on recurring subject.. we could then go to subject thread and add links to others that pertain to it as we use the search function..

[barnstmr]

Re: O-200 in BC12D; Motor Mount

Its actually 5/8" for the lord mount to move the prop flange foreward. The only problem I had was to make the left front baffle a little different to clear the nose bowl. Tim

Before you all get too far into this, I have the drawings for bushing adapters that bring the engine back to within 1/4 inch of the original A65 mount location. It does away with the large rubber lord mounts and uses the A65 style rubber cone style mounts. This will save a lot of trimming and re-work of baffles and cowling when trying to make the O-200 fit using a short C85 mount. It is a standard approved drawing for my STC SA02164LA for the L-2's and I can DER approve this for the BC series airplanes.

[Pearson]

Re: O-200 in BC12D; Motor Mount

Terry,

How hard would it be to get approval for a motor mount that instead of being 4" longer than the short mount, was only 3 3/8" longer? As part of the STC I got from Mr. Harer before he passed away, I received a drawing to make my own motor mount. Even without the drawing it isn't hard to do if you use the original short mount bolt pattern as a guide. I bet if you could get approval for this, it would sell like hotcakes. Then you could use the original O-200 motor mounts and still fit within the cowl.