May I suggest
tonyjohnson said:
My engine was built from a Superior SL kit. It is basically an XP-IO360 but has the SL designation because it was built from a kit. I am trying to figure out the model number to put on the data plate.
I will be using an emag and a pmag. The problem is that Superior has no letter to designate the emag/pmag configuration. The letter C designates lightspeed EI, and Lasar EI has its own letter. No letter has been assigned for the emag/pmag.
For instance, the engine with a lightspeed EI would be IO-360 A1C2
My dilemma is what letter to use as the third letter in the model number. Has anyone else had this issue? I had considered using an X but would prefer something else. If no letter exists for that all of us who will be using that configuration will have to decide on a letter. We may as well establish some consensus.
Any thoughts?
Tony, on the data tag under model, a few suggested model "numbers":
"IO360-TJ-2006" (for tonyjohnson, 2006)
"IO-IO-its-off-to-work-I-go-360" (self explanatory)
"IO360-SSMIG" (for "Super Skyscooter Make It Go'er")
Just kidding.
Serioulsy it does not matter as Mel said, I would stick with SL-IO360A1 or XL-
360A1.
Traditionally on Lyc it does not indicate ignition. An engine data tag on a
certified engine for example it indicates things that are internal to the engine.
My point or suggestion is don't mix in a bunch of made up letters and
numbers on, although you are free to do what ever you want. If you want to
put "2P" for 2 P-mags that is your perogitive, it just does matter or really
make sense to me.
Lyc does not even indicate ignition on the engine data tag, except for "D" for
DUAL magneto. If it is not INSIDE the engine don't echo that on the tag.
It is just a Superior experimental Lyc clone: XP-360-A1, that is it.
To use made up multi number/letters added on to IO-360-A1 might confused
it with a certified Lycoming engine. Adding another set of letter/number's
could make it "look" like a counter weighted (angle valve) 200hp Lyc IO360,
such as IO-360-A1B6.
You want to use -A1C2? The "A" indicates an "original rating" and "1" is the
nose section. That is cool since that is what you have I believe
(Superior "copied" a base line Lyc O-360-A1A and added on fuel injection).
The C indicating a "C" accessory case and #2 counter weights. Lyc does
make a "C" accessory case but a "2" does not exist. (#6 is all that you find
on a 4 cyl. See below.)
Not sure why you don't like "X". I think it's a cool letter and "X" is
synonymous with "X"-perimental, which is also appropriate.
Also somewhere in the data plate (that you
don't need at all BTW)
does it it say Superior? Experimental? If it does not, I would add Experimental
somewhere if it's not there already (to make the DAR happy). I have a stock
Lyc O-360-A1A so the data tag stays. If I modified it, I would have to take it
off I believe. (Is that right MEL?)
Cheers, take care, George
Here is how Lycoming does it for Grins:
MODEL DESIGNATION BREAKDOWN:
Example: AEIO-540-L1B5D
.............(1)....(2)....(3)
(1) Prefixes:
A - Acrobatic (DRY SUMP) AE - Acrobatic Engine
G - Geared
H - Horizontal Helicopter
I - Fuel Injected
L - Left Hand Rotation Crankshaft
M - Drone
O - Opposed Cylinders
S - Supercharged
T - Turbocharged
V - Vertical Helicopter
The prefix of our example engine indicates an acrobatic
engine with opposed cylinder that is fuel injected,
(2) Cylinder Cubic Inch Displacement:
Cylinders:/ Cubic Inch Displacement:
4 / 235, 290, 320, 340, 360,
6 / 435, 480, 540,
8 / 720
6 / 541 (with integral accessory)
NOTE: Slick Magnetos are FAA approved for use on many
engine models; reference latest edition of Service Instruction
No. 1443
(3) Suffixes:
L - Indicates change in Power Section and Rating from Original Design
1 - Indicates Nose Section
B - Indicates Accessory Section
* - Indicates Counterweight Application
D - Indicates Dual Magneto
* Counterweight Applications:
1. On VO-540 models ? the #3 as the 4th suffix character
indicates six third order counterweights.
2. On 0 & 10-540 models ? the #5 as the 4th character
indicates one fifth and one sixth order counterweights.
3. On 4 cylinder models ? the #6 as the 4th suffix character
indicates one sixth and one eighth order
counterweights.
4. On 6 cylinder models ? the #6 as the 4th suffix character
indicates one sixth and five third order counterweights.
Engine Mounts:
Conical ? Straight mounts parallel to crankshaft.
Dynafocal ? Mounts set at a specified angle to the
crankshaft with Type 1 (30?) and Type 2 (18?) being
different angles for four cylinder engines and Type 1 (310)
For: IO-360-A1:
I = Fuel Injected; O = Opposed; 360 = 360 cu-in (4 Cyl);
A = Power Section rating is original design (180HP in this case);
1 = nose section ("1" is just baseline I assume)
