bake

Looking at buying a used BME 102. The carb is bolted on the engine at a 45 degree angle. Weird having the throttle shaft angled 45 degrees from the firewall. Is this something the owner installed wrong or just the way the older BME 102 was made?

Ben Diss

My Feedback: (23)

Not sure what you mean. I have a 102 and I can't imagine what you mean. My carb is below the engine. The opening is horizontal if that helps.

-Ben

bake

Sorry, Hope, this picture can explain it better than I can. See how the throttle servo linkage would have to come in at a 45 degree angle?[img][/img]

Antique

My Feedback: (4)

Never could figure out why someone would design an engine and not make the carb block for the best shot at the throttle servo....Too lazy to figure out a piece of 3/8 G10 with a few tapped holes in it ? 3/8 thick G10 is $24 a square foot..That's enough for at LEAST 36 carb insulator blocks....Sheesh

Geistware

My Feedback: (16)

That is interesting, I went in the garage and looked at mine, and it id no where near that bad. The diaphram hold is almost straight out. THe carb has a slight tilt but it makes the radius of the choke and throttle arms in line with the fuselage.

Not to be insulting, are you sure it is mounted correctly?

RTK

My Feedback: (1)

Although I do not have the 102, that carb does not look right. My engine is like Geistware's where the choke and throttle are as close as you could ask for.
Your's looks waaaay off.

Antique

My Feedback: (4)

Looks like if the carb insulator block were to be turned over the carb would bolt on in a better position.....

RTK

My Feedback: (1)

By the way, what happened to those pipes and that throttle arm laying on the table?
The pipes are not supposed to be removable are they?

Geistware

My Feedback: (16)

Ralph,
Are you saying that the choke is closer to the engine and the throttle butterfly is what we see?

pdfruth

My Feedback: (4)

bake,
I have a BME 102, and just finished installing it in a 33% H9 CAP 232.
The bottom line is.... yup, that's the way the carb is mounted. Makes the throttle servo/linkage a bit of a challenge, but that's the way it goes.
Great engine.

RTK

My Feedback: (1)

Where is Houdini when you need him. That just doesn't look right.

Ben Diss

My Feedback: (23)

I wonder if there are two different sets of holes in the case or if there was manufacturing change, because my 102 isn't anything like that.

-Ben

Geistware

My Feedback: (16)

I have a BME 102 in a H9 Cap, Looks nothing like that.
I am uploading pictures I just took (wife is now home with camera)

toddblose

My Feedback: (10)

What happened is you have one of the first BME 102's. The machine shop messed up the cases
They were fixed on the next run of cases.

pdfruth

My Feedback: (4)

Hmmm, must have been an engineering change somewhere along the way. I wish mine looked like Geistware's. Would have made servo/linkage installation much easier.

Ben, there is only one set of bolt holes (in my engine's case).

Antique

My Feedback: (4)

Wouldn't be much trouble to make a new insulator block from 3/8 G10...Bolt the block to the engine with flathead screws, rotate to carb to whatever angle you want and drill and tap the block for 10-32 allens....Piece of cake...every conversion I ever made has been done this way, the throttle shaft is parallel to the cylinder/s, direct straight connection to the throttle servo.

Geistware

My Feedback: (16)

My humble recommendation is to send it to Ralph and let him do it.

Tim_Indy

Todd is right. I just looked at my 110 (use same carb) and the manufacturer cast the carb BOLT mounting boses 90 degrees wrong. They should be at 2 o'clock and 8 o'clock, rather than 10 o'clock and 4 o'clock. Wonder how that got out?

I happened to find a pic of the corrected arrangement for comparison's sake.

Tim

Geistware

My Feedback: (16)

Tim's picture is how mine is set up

pdfruth

My Feedback: (4)

RCIGN1,
Where can I get some of this G10? What is it (i.e. metallic substance, composite, etc)? How do you machine it?

I'm absolutely not afraid of doing a little fabrication.
For what it's worth... I've used MDF, soaked with CA, to build a thicker spacer for the carb on my ZDZ 80 (yup, just go to HomeDepot and buy some MDF from the building dept). MDF is great cuz it's dense and doesn't compress too much, especially when soaked in CA, but it isn't strong enough to hold the threads of a 10x32 bolt.

bake, I'm sorry to hi-jack your thread... but I think this is still relevant... may come in handy for similar situations in the future.

Antique

My Feedback: (4)

G10 is epoxy board..I machines just like aluminum...It's abrasive, so you need to use good tools...It's really hard on high speed steel end mills, I use solid carbide...It can be found at industrial suppliers like MSC...$24 for a square foot of 3/8 thickness....I get 4 square feet at a time...Figure out what size you want, I can send some...