For once and for All !

[pftcraft]

Can a BC12D get a new 85 with simply a field approval as opposed to an STC for an 0 200. From what I understand the 85 will bolt right in while the 0 200 requires much more work. True ? Any one with personal experience or knowledge please respond.....

[flyguy]

Re: For once and for All !

My 85 is on a short mount and was a field approval. I was told, don't remember who, that they will not do it that way now. Nowdays it requires the wing attach fittings upgrade, which requires a STC. I have the STC documentation if you have any questions about that. My aircraft is certified for just the engine switch, no weight increase from the -65.
There is considerable discussion of this subject here, try a search.
Darryl

[N96337]

Re: For once and for All !

I don't know about Canada, but down here, I'd be amazed if you got a field approval for that, seeing as how there is already an STC for that exact installation. If it was me, I'd just cough up the money for the STC, do the fitting mods, and have it all over with as far a data and approval is concerned. You can keep the short mount and all that you already have (that's the way mine was done) and you'll love it!
John

[VictorBravo]

Re: For once and for All !

Mine is done with the STC, short mount. IMHO, after having done it through the STC, it's a toss-up.

The STC has you doing a lot of things that are marginally or not needed. But it is a straight paperwork shuffle with no aggravation.

Doing your own 337 allows you to pick and choose which mods you need, but requires more effort on the paper end.

Upgrading the strut fittings is not really necessary if you can get a 337 that keeps the same 1200 gross weight. However it definitely does not hurt, makes you sleep better, etc. The spar root bushings are more or less the same... not truly necessary if you definitely know you have good spars, but certainly makes you feel a little better. The -6 fuel line is definitely a good idea even though the smaller one will probably not cause an engine failure... because it's a great excuse to put in a new Teflon base, integral firesleeved, shiny new lifetime hose that will last forever.

[Ragwing nut]

Re: For once and for All !

It is over 10% upgrade so unless you can find a 337 prior to Oct '55, it will require some type of STC.

[Dano"T"]

Re: For once and for All !

Get the STC...Do the Fuel system Mods and keep the 1200lb gross weight. Structuraly IMHO the wing mods were done to please the FAA...they wanted SOME sort of structural mods done before they would approve a Gross weight increase...again...Just my opinion. Here is a 337 and letter from FAA saying that buying the Harer STC and doing only the fuel mods is acceptable

This is a letter from FAA ENGINEERING OFFICE saying it's okay as long as you buy the Harer STC

[pftcraft]

Re: For once and for All !

Thanks for the replies..we are getting somewhere now. See here is the deal. I have an 0-200 rebuild that can be installed but it requires much modification. I also have the opportunity to trade my 0-200 for a certified rebuilt 85. Now .. does the 85 bolt right in place of the 65 or is there mount mods and cowl mods as in the 0-200 install ? I'm leaning towards just installing the 85 and do the fuel lines and thats it. I have the Harer STC already and could go either way but I want to keep the plane in the Advanced Ultralight class here in Canada. The Plane is Certified but since it has a gross weight under 1220 lbs it can be flown with an ultralight licence . If I put in the 0-200 I think it increases the Gross weight and will therefore not allow it to be flown as an ultralight.

[Forrest Barber]

Re: For once and for All !

Gross weight is Gross Weight. Engine HP is engine HP. they are separate items . Get a good IA. I think you mean Light Sport not ultralite??

[rotaxflyer]

Re: For once and for All !

He means ultralight. In Canada, ultralights can weigh up to 1200 lbs or slightly more for the advanced ultralight category. I re-registered my t-craft to the ultralight category and I now have a zero bureaucracy flying experience.

In addition, the ultralight pilot permit has a self-declared medical and a very basic training syllabus that keeps the cost very low.

pftcraft - why don't you consider ditching the C of A and re-register the plane to the ultralight category. Then you can make whatever mods you feel are safe and do your own maintenance if you feel qualified.

Andy

[Forrest Barber]

Re: For once and for All !

Ah yes I read back and now see Canada.... Somebody talked about the FAA ; that was the CAA and these ships are still Standard Category +5 & -2 g's ; the problem in certification was usually the negative loadings.
The BC12D was good to 1280 structurally but needed the extra HP to get over the 1200 on the performance tests.
My father flew a special test of a BC12D with over 125 hp and over 2000 lb. Gross. It was a prototype for the Model 15. NOT 15A , 15.

[Dano"T"]

Re: For once and for All !

Get the STC...Do the Fuel system Mods and keep the 1200lb gross weight. Structuraly IMHO the wing mods were done to please the FAA...they wanted SOME sort of structural mods done before they would approve a Gross weight increase...again...Just my opinion. Here is a 337 and letter from FAA saying that buying the Harer STC and doing only the fuel mods is acceptable

This is a letter from FAA ENGINEERING OFFICE saying it's okay as long as you buy the Harer STC

Here T-Rex....This is what you need.