Winterization plate placard decal question...

[jrenwick]

Wax the surface before you apply the duct tape. But be certain to clean the surface of the exposed side of the duct tape with alcohol before applying the decals.

[flat country pilot]

If you put the decals on the sticky side of the duct tape, they will never come off.

Bill

[4stripes]

Doug,

Those plates look like they might be from an A model or ragwing, with the internal air box -- am I right? They're different from the ones Corey posted pics of, which were for a B model. I wonder also if the decals indicated different temperature ranges between the two models, because the engine cooling characteristics must be somewhat different.

Best Regards,

John

These would be applicable on the '52 B model as well since that was the last year of the "old" style cowl and airbox. You're right that they are different than the ones Corey posted but those started in '53.

Good point on the temperatures It's quite possible that they are different due to the different baffles, but I'm in no position to speak with authority on that one.

Doug Since you appear to have the factory issued plates I wonder if you would consider tracing them and maybe submitting the tracings to headquarters so some of the rest of us could make our own to the exact dimensions that Cessna used. I know I really would like to have a set and I bet there are others like me out there. Bill K

Will do Bill. Someone else has asked me for drawings a couple times and I keep forgetting to do it. Maybe now I'll remember.

FYI, I don't have the "J" shaped bolts used to hold them onto the grills so you'll be on your own for those.

Hi Doug,
Thanks for your input, but I disagree with your assumption that the plate would have the same limitation for a '52B model. I checked the part numbers (see my earlier post for different numbers). The "straight 170" had a different number than the B models (even though the cowl was the same as on the first B model year). All B models had the 30F limit for the cowl intakes according to the parts manuals I checked.
I have the same plates as pictured in your post, but think the placard applies to types other than B models.
Cheers Eric

[Bruce Fenstermacher]

The difference of the temperatures from early years to later even with the seemingly same cowl may be the smaller lip of the bottom of the cowl that was changed in '51 and later cowls. Otherwise they and the pressure cowl are the same despite different part numbers for the same part from the earlier models of the cowl to the later years.

The different part number could be because of a different limitation decal applied which might be because of the different lip or simply just an updated number for the same part.

I noticed this as I was making a study of parts changes as they relate to serial numbers as part of my research as to what serial numbers are what years of manufacture.

[4stripes]

I'm pretty sure Cessna didn't just re-number the same decal, as the oil pan cover maintained the same part number for both models, but the cowl intake changed...
Cheers Eric

[Bruce Fenstermacher]

Eric
You missed what I was saying. If they took an other wise same part but applied a different decal which changed the part then that might be a new part number.

And if you compare the parts for the cowl serial 18003 o 19200 and 19200 on you will see that all the parts that ended in 2000 now end in 2001 yet we know they didn't change. One example would be the Hood Assembly- Cowl-Left, part number 0552000-4 which changed to 0552001-4.

The only change to the cowl is the lip after serial 19200.

Here is the parts breakdown for all three winterization kits.

The top is from the 170A parts catalog. Take note of the decal (59-7) part number 0552105 for the grill cover.

The middle is from the B model IPC for the early cowl serials 20267 thru 25372 (or 1952). Note the decal for the same part as the A model PIC, -7 has changed to 0552102. this probably reflex the change to the wording on the decal.

The bottom list is for the later cowl style of the B model. Note part -7 uses the same part number 0552102, as the early model '52 cowl.

So the change in decal did not follow the change in the cowl lip which happened earlier.

Now looking at the part number for the Cover Assembly - Cowl grill winterization, we see that the part number did not change for the A model and B model early cowl style despite the fact that the decal or at least it's part number did change in '52

Comparing all the IPCs carefully can reveal interesting stuff.

[doug8082a]

Bruce you beat me to the punch

Code: Select all

     	     	    	Cover Assembly - 	  	Plug Assembly -		Installation Kit - 
     	     	    	Cowl Grill	         	Nose Cowl	     	Winterization
Model	s/n	      	Winterization	Decal 	Vent   	Decal  	Equipment
170 	All          		0552101  	0552105	0552104	0552103	52-3-828
170A	All          		0552101  	0552105	0552104	0552103	52-3-828
170B	20267 - 25372		0552101  	0552102	0552104	0552103	52-3-828
170B	25373 -onward		0552106-3	0552102	0552104	0552103	AK70B53-1

My statement stands that the cowl plates are applicable to the '52 B model. John's first point had to do with the physical changes to the later B model cowls and, therefore, the need for a different cowl plug. However, the issue of temperature limitations is a different topic. It is clear that the part number changed for the decal in '52 which is interesting since the cowl and baffles are the same as the A model.

I'm pretty sure Cessna didn't just re-number the same decal, as the oil pan cover maintained the same part number for both models, but the cowl intake changed...
Cheers Eric

As for changing parts and keeping part numbers, the "Plug Assembly - Nose Cowl Vent" (oil pan cover) is a great example exactly that. The part number remains the same throughout the life of the 170 series (0552104) despite being changed in the '53 model year (beginning with s/n 25373). This change was to add a cutout at the top and bottom of the plug to accomodate the raised ridge (bead) that runs vertically down the centerline of the nose bowl on the later B models (see pages 146-147 of the B model IPC). While this "new" version of 0552104 would certainly fit the earlier 170s, the reverse is not the case since you would not be able to mount the "old" plug on the "new" cowl unless the cutouts were present.

[Bruce Fenstermacher]

OK you folks with eagle eyes may have noticed at the bottom of the A model list there is a Cover- Muff (optional for Extreme Cold Weather Operations) (not illustrated) part 0550148.

Anyone no what this is and what it looks like?

[doug8082a]

OK you folks with eagle eyes mya have noticed at the bottom of the A model list there is a Cover- Muff (optional for Extreme Cold Weather Operations) (not illustrated) part 0550148.

Anyone no what this is and what it looks like?

It also appears to be unique to the "A" model since it is not listed in the straight 170 or "B" model IPCs.