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Search: Posts Made By: Piper J3
Forum: RV-12/RV-12iS Today, 01:21 PM
Replies: 281
Views: 61,434
Posted By Piper J3
If vapor lock occurs in the fuel lines, then...

If vapor lock occurs in the fuel lines, then perhaps add’l insulation on top of the existing Fire Sleave is warranted.

Amazon Aircraft Dept again to the rescue with both 1” ID x 36” L and 5/8” ID...
Forum: RV-12/RV-12iS Today, 12:06 PM
Replies: 281
Views: 61,434
Posted By Piper J3
Carb Temp Sensing...

I bought a two-channel temperature sensor with 1-meter thermocouples on Amazon for $13.99 (obviously, non-certified at this price point). I intend to temporarily install using 3M double-sided tape...
Forum: RV-12/RV-12iS 04-10-2021, 07:06 AM
Replies: 14
Views: 1,538
Posted By Piper J3
You might want to check radar. This image from...

You might want to check radar. This image from ForeFlight 8:45 AM today...
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Forum: RV-12/RV-12iS 04-10-2021, 02:31 AM
Replies: 19
Views: 662
Posted By Piper J3
I’m curious, so I’ll ask question here… Has...

I’m curious, so I’ll ask question here… Has anyone found anything of consequence when disassembling/inspecting Gascolator?

The reason I ask is the Gascolator, by design, is a self-cleaning unit. ...
Forum: RV-12/RV-12iS 04-09-2021, 10:26 AM
Replies: 281
Views: 61,434
Posted By Piper J3
Scott – Thanks for response. Glad I could add...

Scott –

Thanks for response. Glad I could add some levity to your day.

You’re probably too young to have experienced the real heavy iron out of Detroit... ’59 was a big year (read: big fins) for...
Forum: RV-12/RV-12iS 04-09-2021, 08:12 AM
Replies: 281
Views: 61,434
Posted By Piper J3
Speaking about engine failures… Paul Bertorelli...

Speaking about engine failures… Paul Bertorelli (AVweb) mentions Rotax leads Lyc and Cont in this category. The comparison is done in overall failures per 1000 engines produced.

See video at...
Forum: RV-12/RV-12iS 04-08-2021, 02:56 PM
Replies: 281
Views: 61,434
Posted By Piper J3
A quick question then… Are the louvers in the...

A quick question then… Are the louvers in the 12iS top cowl for add’l cooling? Or are they there to make it look like a Buick Electra 225 (Deuce & ¼)?
Forum: RV-12/RV-12iS 04-08-2021, 02:23 PM
Replies: 281
Views: 61,434
Posted By Piper J3
I would guess there is plenty of cool air...

I would guess there is plenty of cool air ingested during flight. It's the ground ops that cause elevated carb body temp and elevated temp of the fuel in both hoses feeding the carbs and the fuel in...
Forum: RV-12/RV-12iS 04-08-2021, 12:49 PM
Replies: 281
Views: 61,434
Posted By Piper J3
And another thought... The carbs on RV-12 do not...

And another thought... The carbs on RV-12 do not intake cold air like most other airplanes. So, the hot under-cowl air contributes to increase carb body temperatures. Lots of things going in the...
Forum: RV-12/RV-12iS 04-08-2021, 09:28 AM
Replies: 281
Views: 61,434
Posted By Piper J3
I hear what everyone is saying about not using...

I hear what everyone is saying about not using Winter blend auto fuel (lower vapor pressure) in warm weather. I experienced vapor lock on the ground several years ago and now it happened again in...
Forum: RV-12/RV-12iS 04-07-2021, 04:04 PM
Replies: 281
Views: 61,434
Posted By Piper J3
Joe - Where would the temps display? I think...

Joe -

Where would the temps display? I think the screen position where MAP is can be assigned to a different sensor.
Forum: RV-12/RV-12iS 04-07-2021, 12:25 AM
Replies: 281
Views: 61,434
Posted By Piper J3
Thanks for your input Greg. I wonder if adding a...

Thanks for your input Greg. I wonder if adding a series of louvers on the top cowling would keep temps in check?

As an experiment, I’m buying a two-channel digital temp sensor with type-K...
Forum: RV-12/RV-12iS 04-06-2021, 11:17 PM
Replies: 281
Views: 61,434
Posted By Piper J3
I agree with above. My temps – (2) EGT, (2) CHT,...

I agree with above. My temps – (2) EGT, (2) CHT, and oil temp all same with/WO cylinder cooling shroud. Oil temps in green arc. My concern is with ground ops. It would be nice to have sensor to...
Forum: RV-12/RV-12iS 04-06-2021, 04:48 PM
Replies: 281
Views: 61,434
Posted By Piper J3
^^^ Right ^^^ Now I’m wondering if removing the...

^^^ Right ^^^

Now I’m wondering if removing the cylinder cooling shroud maybe increases under-cowling temperatures during ground operations. I just finished repairing a cracked engine mount,...
Forum: RV-12/RV-12iS 04-06-2021, 03:28 PM
Replies: 281
Views: 61,434
Posted By Piper J3
I may be joining the “Sinker Club” for 2nd time. ...

I may be joining the “Sinker Club” for 2nd time. Today I did several TO/Landing to full stop at a remote airport and on last TO had horrible stumble/vibration at about 500 AGL before turning...
Forum: RV-12/RV-12iS 04-04-2021, 02:40 PM
Replies: 8
Views: 692
Posted By Piper J3
Easter Sunday, April 4, 2021

I soloed April 4,1971 when I was in high school. My father flew a B-17H in WWII and he taught me to fly - this was after he and I rebuilt a 1946 Aeronca Chief. I flew 80 hours in the Aeronca and...
Forum: RV General Discussion/News 04-04-2021, 12:29 PM
Replies: 20
Views: 1,675
Posted By Piper J3
Using my RV-12 to celebrate 50th anniversary of first solo…

I soloed April 4,1971 when I was in high school. My father flew a B-17H in WWII and he taught me to fly - this was after he and I rebuilt a 1946 Aeronca Chief. I flew 80 hours in the Aeronca and...
Forum: RV General Discussion/News 04-03-2021, 12:36 PM
Replies: 20
Views: 1,675
Posted By Piper J3
I plan on flying my RV-12 tomorrow, Easter...

I plan on flying my RV-12 tomorrow, Easter Sunday, to celebrate 50th anniversary of my first solo 4-4-71.

If weather is good tomorrow, and flight happens as planned, I'll post some pics.
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Forum: RV-12/RV-12iS 03-31-2021, 04:55 AM
Replies: 8
Views: 592
Posted By Piper J3
I think some of the design features of the...

I think some of the design features of the 9-series engine that allow long service life include roller bearing crankshaft, camshaft positioned below crank, sealed crankcase with remote oil tank,...
Forum: RV-12/RV-12iS 03-30-2021, 05:34 PM
Replies: 8
Views: 592
Posted By Piper J3
I had to check your math. Hard to believe...

I had to check your math. Hard to believe...
Forum: RV-12/RV-12iS 03-30-2021, 04:14 PM
Replies: 8
Views: 592
Posted By Piper J3
Rotax 912 History...

There are a lot of new folks on the forum these days so I thought I’d mention a little Rotax history…

When I bought my RV-12 back in 2015 I was curious why Rotax called their 4 cylinder...
Forum: RV-12/RV-12iS 03-30-2021, 03:26 PM
Replies: 12
Views: 963
Posted By Piper J3
Balance the carbs at just-off-idle where throttle...

Balance the carbs at just-off-idle where throttle arm comes off the idle stop. Mid-range is a **** shoot and can’t be adjusted. Likewise, full-throttle can’t be adjusted, but should be very closely...
Forum: RV-12/RV-12iS 03-29-2021, 10:26 AM
Replies: 5
Views: 489
Posted By Piper J3
That's good to know. Not a whole we can do to...

That's good to know. Not a whole we can do to help. I suggest troubleshooting by disconnecting door first to see if cable behaves on its own. Keep us posted I guess...
Forum: RV-12/RV-12iS 03-29-2021, 06:47 AM
Replies: 8
Views: 1,227
Posted By Piper J3
it's important to know if that is a true crack so...

it's important to know if that is a true crack so it gets reported to Van's. I suggest you clean paint from the area and have a close look with magnification. If in doubt, dye penetrant will...
Forum: RV-12/RV-12iS 03-28-2021, 02:56 PM
Replies: 15
Views: 3,636
Posted By Piper J3
Can't run all the time - you'd need a much bigger...

Can't run all the time - you'd need a much bigger battery... :D
Forum: RV-12/RV-12iS 03-28-2021, 02:54 PM
Replies: 7
Views: 472
Posted By Piper J3
Truth of the matter is... I got tired of...

Truth of the matter is... I got tired of straightening these out and buying new from Rotax distributors for way too much money.
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Forum: RV-12/RV-12iS 03-28-2021, 10:41 AM
Replies: 7
Views: 472
Posted By Piper J3
I made an offset hook to put spring on centerline...

I made an offset hook to put spring on centerline with carb. Hook is made from 0.062" music wire. Clamp is rotated to vertical position for quick visual inspection.
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Forum: RV-12/RV-12iS 03-27-2021, 02:23 PM
Replies: 7
Views: 472
Posted By Piper J3
You are correct - slight angle. Perhaps I'll...

You are correct - slight angle. Perhaps I'll make a strap similar to original Rotax clamp to maintain CL.
Forum: RV-12/RV-12iS 03-27-2021, 11:57 AM
Replies: 7
Views: 472
Posted By Piper J3
John - Hose is 4-ply. I doubt if it will swell....

John -

Hose is 4-ply. I doubt if it will swell. It's really stout...
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Forum: RV-12/RV-12iS 03-27-2021, 10:18 AM
Replies: 7
Views: 472
Posted By Piper J3
Heavy Duty Clamp for Intake Manifold Crossover Balance Tube

I finished installing High Performance Silicone heater hoses to satisfy the 5-year rubber replacement. I used HPS 7/16" ID, 1 Foot Length, Silicone Straight Coupler Tube Hose, High Temp 4-ply...
Forum: RV-12/RV-12iS 03-26-2021, 11:53 PM
Replies: 24
Views: 2,040
Posted By Piper J3
True, but you did option for the Bing sinking...

True, but you did option for the Bing sinking floats like all the rest of us did…
Forum: RV-12/RV-12iS 03-26-2021, 01:23 PM
Replies: 24
Views: 2,040
Posted By Piper J3
Bing and Rotax can call the clear hose anything...

Bing and Rotax can call the clear hose anything they want. “Overflow” might raise some eyebrows and detract from sales. It certainly functions as a vent to normalize atmospheric pressure in the...
Forum: RV-12/RV-12iS 03-26-2021, 09:31 AM
Replies: 24
Views: 2,040
Posted By Piper J3
I’m still thinking about this. The current...

I’m still thinking about this. The current overflow hose is pointed vertically down. If the float needle valve does not shut off, fuel will flow very easily thru the overflow tube and gravity will...
Forum: RV-12/RV-12iS 03-26-2021, 01:23 AM
Replies: 24
Views: 2,040
Posted By Piper J3
One possible drawback is what will happen if...

One possible drawback is what will happen if (when) floats sink and carb float bowl overflows. I have witnessed this firsthand and it is horrifying to see. Facet electric fuel pump flows something...
Forum: RV-12/RV-12iS 03-25-2021, 03:19 PM
Replies: 24
Views: 2,040
Posted By Piper J3
See first photo above... Notice the safety wire...

See first photo above... Notice the safety wire on enrichment cable where it enters the adjustment ferrule. I mentioned this once in a thread and Van's said not necessary. It keeps the cable...
Forum: RV-12/RV-12iS 03-25-2021, 03:06 PM
Replies: 27
Views: 3,071
Posted By Piper J3
Nickel Plated Flat Washer - Does that have 100...

Nickel Plated Flat Washer - Does that have 100 deg countersink to match aviation flat head screw?

Where to buy / PN?
Forum: RV-12/RV-12iS 03-24-2021, 02:07 PM
Replies: 27
Views: 3,071
Posted By Piper J3
Probably better way to accomplish this... why not...

Probably better way to accomplish this... why not just get Stainless Steel flat washer? Perhaps a thin shim washer would be ideal.
Forum: RV-12/RV-12iS 03-23-2021, 11:54 PM
Replies: 27
Views: 3,071
Posted By Piper J3
That is one location where I have not used the...

That is one location where I have not used the C'sink washers. My upper cowl is scheduled for cosmetic upgrade.
Forum: RV-12/RV-12iS 03-23-2021, 05:57 PM
Replies: 27
Views: 3,071
Posted By Piper J3
I use countersunk washers everywhere... -

I use countersunk washers everywhere...
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Forum: RV-12/RV-12iS 03-23-2021, 12:43 PM
Replies: 12
Views: 1,074
Posted By Piper J3
You might want to remove top plate on trim servo...

You might want to remove top plate on trim servo and check gears for lube.

I had intermittent trim problems with my early SN RV-12 a few years back and isolated the problem to the PWM circuit Scott...
Forum: RV-12/RV-12iS 03-23-2021, 12:16 PM
Replies: 54
Views: 10,631
Posted By Piper J3
I finished installing the new Silicone High...

I finished installing the new Silicone High Performance Heater Hoses today. I did not use a molded elbow hose for the top of the #3 cylinder. Instead, I added the Goodyear E-Z Coil to keep the top...
Forum: RV General Discussion/News 03-22-2021, 06:46 PM
Replies: 26
Views: 2,280
Posted By Piper J3
I routinely do full slip with full flaps on...

I routinely do full slip with full flaps on landing over tall trees with my RV-12. See video below…
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https://youtu.be/CvsuBcV5IZs
Forum: RV-12/RV-12iS 03-22-2021, 03:52 PM
Replies: 7
Views: 947
Posted By Piper J3
Might be due for 5-year rubber replacement. Also...

Might be due for 5-year rubber replacement. Also new Engine Mount Isolators PN -22002.
Forum: RV-12/RV-12iS 03-21-2021, 10:09 AM
Replies: 2
Views: 386
Posted By Piper J3
Thank you...

Thank you...
Forum: RV-12/RV-12iS 03-21-2021, 07:44 AM
Replies: 2
Views: 386
Posted By Piper J3
Routing Oil Hoses Behind Engine Mount

I remember a change for routing oil hoses behind engine mount but can't find documentation. I'd like to route both hoses from oil tank between standoff and rear ring on main engine mount.

Drawing...
Forum: RV-12/RV-12iS 03-21-2021, 06:09 AM
Replies: 26
Views: 3,822
Posted By Piper J3
I rebuilt carbs last year and synch checked...

I rebuilt carbs last year and synch checked annually.

This year I will balance prop for first time. I will be interested to see balance improvement. Engine runs extremely smooth at cruise and...
Forum: RV-12/RV-12iS 03-21-2021, 06:04 AM
Replies: 34
Views: 2,743
Posted By Piper J3
I added a grease fitting to the nose fork...

I added a grease fitting to the nose fork bushing. No need to remove fork as small drill pulls chips out. I used 1/16” thru drill and then ¼” drill x ¼” deep counterbore. Grease fitting is ¼”...
Forum: RV-12/RV-12iS 03-18-2021, 01:26 PM
Replies: 26
Views: 3,822
Posted By Piper J3
Weld repair is complete. Chromoly 4130 split...

Weld repair is complete. Chromoly 4130 split over-sleave is TIG welded into tubing cluster.

Third photo shows weld fixture to hold 189mm vertical centerline distance for engine mounting pads.

On...
Forum: RV-12/RV-12iS 03-17-2021, 07:19 AM
Replies: 14
Views: 2,137
Posted By Piper J3
I would say something is bit off the mark in...

I would say something is bit off the mark in Van’s schedule/shipping departments. I ordered new engine mount WD-1220 a week ago Monday and specifically asked if it was in stock. Answer was… it...
Forum: RV General Discussion/News 03-16-2021, 08:29 AM
Replies: 19
Views: 1,888
Posted By Piper J3
Removed engine mount on my early SN RV-12 to...

Removed engine mount on my early SN RV-12 to repair crack in lower tube at left side engine attach point. Engine mount WD1220 out-of-stock at Van’s with estimated ship date of mid-May. I will...
Forum: RV-12/RV-12iS 03-15-2021, 07:26 PM
Replies: 26
Views: 3,822
Posted By Piper J3
Yes, new rubber bushings and all new High...

Yes, new rubber bushings and all new High Performance Silicone Heater Hoses.
Forum: RV-12/RV-12iS 03-15-2021, 03:18 AM
Replies: 26
Views: 3,822
Posted By Piper J3
Yes. Lower left (pilot side) engine mounting...

Yes. Lower left (pilot side) engine mounting bolt.
Forum: RV-12/RV-12iS 03-14-2021, 06:49 PM
Replies: 26
Views: 3,822
Posted By Piper J3
Now that the mount is no longer bolted to the...

Now that the mount is no longer bolted to the engine the crack has closed up and vertical spacing between mounting pads is less than 189mm. When we jig the mount for 189MM vertical spacing between...
Forum: RV-12/RV-12iS 03-14-2021, 04:58 PM
Replies: 26
Views: 3,822
Posted By Piper J3
It took two guys a total of eight hours to remove...

It took two guys a total of eight hours to remove engine mount. As stated above, Van’s won’t receive mounts from their supplier until May 3.

I have located a welding shop that specializes in TIG....
Forum: RV-12/RV-12iS 03-12-2021, 08:29 PM
Replies: 1
Views: 523
Posted By Piper J3
It would also be interesting to know what fuel...

It would also be interesting to know what fuel type and oil used.

100LL
Unleaded Mogas
93E10 Mogas
--------
AeroShell Sport Plus 4
Mobil 1 Racing 4T 10W-40 Motorcycle Oil
Forum: VAF Classifieds (posts in here deleted after 30 days) 03-12-2021, 10:51 AM
Replies: 0
Views: 156
Posted By Piper J3
WTB / Trade RV-12 Engine Mount WD-1220

I discovered a cracked tube in my RV-12 engine mount WD-1220. I have new mount on order with Van’s but they inform me today that it is out of stock and expected delivery is May 3.

So, a couple of...
Forum: RV-12/RV-12iS 03-12-2021, 10:41 AM
Replies: 26
Views: 3,822
Posted By Piper J3
I have a new twist on my problem… Van’s tells me...

I have a new twist on my problem… Van’s tells me today that engine mounts are not in stock and expected delivery is May 3.

So, a couple of possibilities:

Does anyone either have a spare engine...
Forum: RV-12/RV-12iS 03-12-2021, 08:56 AM
Replies: 54
Views: 10,631
Posted By Piper J3
This looks like a good solution... Heater hose...

This looks like a good solution... Heater hose 5/8 exterior spring with spine to hold shape of hose for custom bending of straight hose.
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Forum: RV-12/RV-12iS 03-12-2021, 07:57 AM
Replies: 18
Views: 1,771
Posted By Piper J3
OP has only five posts so perhaps airplane is in...

OP has only five posts so perhaps airplane is in early flight stage. That being the case, it may take a few tanks of fuel to flush debris leftover from building process.

I'm going to get...
Forum: RV-12/RV-12iS 03-12-2021, 07:49 AM
Replies: 54
Views: 10,631
Posted By Piper J3
I am reconsidering this based on your reasoning. ...

I am reconsidering this based on your reasoning. I didn't want to install the molded elbow because the radius bend is so small. I can't find a large radius bend molded elbow so I will be installing...
Forum: RV-12/RV-12iS 03-11-2021, 10:24 AM
Replies: 54
Views: 10,631
Posted By Piper J3
I made a management decision today while...

I made a management decision today while installing new Silicone High Performance Heater Hoses. Rotax uses a molded hose for the top #3 cylinder in order to route around the ignition modules. I’m...
Forum: RV-12/RV-12iS 03-10-2021, 07:44 PM
Replies: 26
Views: 3,822
Posted By Piper J3
I ordered new engine mount. Part is in stock but...

I ordered new engine mount. Part is in stock but won't ship for a week. Van's is behind because of ice storm, power outage, and COVID.
Forum: RV-12/RV-12iS 03-10-2021, 07:02 AM
Replies: 54
Views: 10,631
Posted By Piper J3
Thanks for info. Do you know spec for spring...

Thanks for info. Do you know spec for spring clamp? Working size?
Forum: RV-12/RV-12iS 03-10-2021, 06:45 AM
Replies: 54
Views: 10,631
Posted By Piper J3
The 912ULS uses 17mm coolant hoses. Most folks...

The 912ULS uses 17mm coolant hoses. Most folks use 5/8” heater hose when doing 5-year rubber replacement. A 90-degree molded hose is required in one of the eight cylinder head locations.

On the...
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