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Search: Posts Made By: Piper J3
Forum: RV-12/RV-12iS Yesterday, 06:53 PM
Replies: 81
Views: 2,321
Posted By Piper J3
I started this thread to highlight a potential...

I started this thread to highlight a potential problem that many may be unfamiliar with. All posts are relevant and certainly welcome. Forum is an invaluable tool to promote safety, understanding,...
Forum: RV-12/RV-12iS Yesterday, 05:45 PM
Replies: 4
Views: 193
Posted By Piper J3
I thought everyone painted their fork... -

I thought everyone painted their fork...
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Forum: RV-12/RV-12iS Yesterday, 02:19 PM
Replies: 81
Views: 2,321
Posted By Piper J3
If I decide to add louver to rear of top cowling,...

If I decide to add louver to rear of top cowling, I will buy another remote temperature sensor to monitor two cylinders for air cooling. Rotax 912 Installation Manual says maximum permitted cylinder...
Forum: RV-12/RV-12iS Yesterday, 11:00 AM
Replies: 81
Views: 2,321
Posted By Piper J3
Not so sure of that either. Most of the time...

Not so sure of that either. Most of the time NTSB doesn’t even travel to accident site. Don’t think vapor lock is high up on list of possible causes...
Forum: Glass Cockpit Yesterday, 07:04 AM
Replies: 2
Views: 81
Posted By Piper J3
I contacted Dynon with this question and await...

I contacted Dynon with this question and await their reply. Last time I talked to them about D-180 they said all the software engineers that designed the D-180 have moved on and no longer with...
Forum: Glass Cockpit Yesterday, 03:03 AM
Replies: 2
Views: 81
Posted By Piper J3
D-180 EMS Page - Displayed Items

I have a D-180 question. I have read Installation and User manuals and they allude to being able to move what is displayed on main EMS to different locations on the screen. My screen (see attached)...
Forum: RV-12/RV-12iS Yesterday, 02:41 AM
Replies: 81
Views: 2,321
Posted By Piper J3
Might not be as rare as we think. Several...

Might not be as rare as we think. Several reports here in this thread, and since starting thread, I rec’d two PMs from guys not willing to go public.

I live in the northern part of the country and...
Forum: RV-12/RV-12iS 04-18-2021, 08:20 PM
Replies: 81
Views: 2,321
Posted By Piper J3
A few years ago, I saw a Cassutt Racer with Cont...

A few years ago, I saw a Cassutt Racer with Cont 0200 land and pilot got out, opened oil door to permit cooling, and then the guy had a 12-volt fan he stuck over the oil door opening to suck out the...
Forum: RV-12/RV-12iS 04-18-2021, 08:10 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Yes, I think that’s pretty much it. So, what...

Yes, I think that’s pretty much it.

So, what can we do to stack the odds in our favor?

Hot Day – Not much can done to alleviate. Fly instead during cool part of day?

Heat-Soaked Engine...
Forum: RV-12/RV-12iS 04-18-2021, 06:53 AM
Replies: 81
Views: 2,321
Posted By Piper J3
The answer to your question is that vapor lock...

The answer to your question is that vapor lock can occur with summer blend Mogas if under-cowl temps allow. So, I feel it necessary to understand and control fuel temperatures FWF regardless of fuel...
Forum: RV-12/RV-12iS 04-18-2021, 06:06 AM
Replies: 81
Views: 2,321
Posted By Piper J3
Yes, I understand concern for cylinder cooling,...

Yes, I understand concern for cylinder cooling, however, the 912 is primarily a liquid-cooled engine.

Jabiru is air-cooled and that presents multitude of problems; front cylinders Vs. back...
Forum: RV-12/RV-12iS 04-17-2021, 11:17 PM
Replies: 81
Views: 2,321
Posted By Piper J3
This is louver I’m thinking about adding at rear...

This is louver I’m thinking about adding at rear top cowling to help extract heat during ground ops. Opening is 9” x 3.75”. Most likely mounted with fiberglass resin from bottom side and no...
Forum: RV-12/RV-12iS 04-17-2021, 04:44 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Yes, I believe that is what is happening. Very...

Yes, I believe that is what is happening. Very surprising how quickly the fuel temp rises when throttle is reduced to near idle.

Going to be interesting to see fuel temp and under-cowl temp when...
Forum: RV-12/RV-12iS 04-17-2021, 02:27 PM
Replies: 6
Views: 366
Posted By Piper J3
^^^^ What he said ^^^^ 3M 1080 Silver Vinyl. ...

^^^^ What he said ^^^^

3M 1080 Silver Vinyl. Really easy to install...
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Forum: RV-12/RV-12iS 04-17-2021, 02:03 PM
Replies: 4
Views: 255
Posted By Piper J3
AOA is already an option for RV-12. It mounts on...

AOA is already an option for RV-12. It mounts on left wing near stall sensor. It doesn't look like normal AOA and not heated. I suppose you could add heated pitot and AOA yourself. 912ULS is...
Forum: RV-12/RV-12iS 04-17-2021, 01:38 PM
Replies: 4
Views: 255
Posted By Piper J3
Pitot tube on RV-12 and RV-12iS is thru the...

Pitot tube on RV-12 and RV-12iS is thru the center of the spinner like a Bf 109 with 20mm cannon in the nose... :D
Forum: RV-12/RV-12iS 04-17-2021, 01:10 PM
Replies: 81
Views: 2,321
Posted By Piper J3
I flew one hour this morning with OAT – 37F so...

I flew one hour this morning with OAT – 37F so not much relevant to vapor lock. I landed at two outlying airports with taxi back for TO at each. I have one temperature probe mounted to right carb...
Forum: RV-12/RV-12iS 04-16-2021, 05:09 PM
Replies: 81
Views: 2,321
Posted By Piper J3
No, actually, I bought Tony T's D-100 to make...

No, actually, I bought Tony T's D-100 to make dual screens when he upgraded to HDX. I have screens supplemented by two mini iPads both running ForeFlight.

I need to keep pinching myself having...
Forum: RV-12/RV-12iS 04-16-2021, 02:31 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Easier said than done... I don't have capability...

Easier said than done... I don't have capability to do serial port for D-180, and besides, the connector is buried in the tunnel.
Forum: RV-12/RV-12iS 04-16-2021, 12:15 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Thanks Scott - I didn’t want to reinstall...

Thanks Scott - I didn’t want to reinstall...
Forum: RV-12/RV-12iS 04-16-2021, 10:57 AM
Replies: 81
Views: 2,321
Posted By Piper J3
A friend has Synergy build RV-12. He took...

A friend has Synergy build RV-12. He took delivery in 2018 and as far as we can see it has same cowling, oil, and coolant radiators. No fiberglass cooling shroud included in the build. Maybe I need...
Forum: RV-12/RV-12iS 04-16-2021, 10:50 AM
Replies: 81
Views: 2,321
Posted By Piper J3
Tony - See Scott McDaniels comments regarding...

Tony -

See Scott McDaniels comments regarding removal of cooling shroud on existing legacy RV-12... https://vansairforce.net/community/showpost.php?p=1405341&postcount=5

Looks like Van's vetted...
Forum: RV-12/RV-12iS 04-16-2021, 08:29 AM
Replies: 81
Views: 2,321
Posted By Piper J3
Yes, I had to repair cracked engine mount and did...

Yes, I had to repair cracked engine mount and did 5-year rubber at same time. Also, removed cooling shroud per latest KAI from Van's. Oil temp, CHT's, and EGT's remain as before which confirms what...
Forum: RV-12/RV-12iS 04-16-2021, 06:50 AM
Replies: 81
Views: 2,321
Posted By Piper J3
I don't think it is a common problem at all,...

I don't think it is a common problem at all, however, it is problem to be avoided at all cost. I have ~640TT and experienced vapor lock in the air for first time last week.

I should not...
Forum: RV-12/RV-12iS 04-16-2021, 03:36 AM
Replies: 81
Views: 2,321
Posted By Piper J3
75F OAT, fresh 93E10 from Tier 1 supplier (winter...

75F OAT, fresh 93E10 from Tier 1 supplier (winter blend vapor pressure fuel), multiple TO / landings / taxi back. On third take off, at approx. 500’, I experienced severe vibration and power loss. ...
Forum: RV General Discussion/News 04-15-2021, 08:04 PM
Replies: 17
Views: 714
Posted By Piper J3
I have two mini-iPads in my RV-12. One mounted...

I have two mini-iPads in my RV-12. One mounted on a custom aluminum angle and the other is mounted with 3M Body Side Molding foam tape. This second iPad is mounted where a Garmin 286 was removed at...
Forum: RV-12/RV-12iS 04-15-2021, 07:42 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Vapor Lock RV-12 Rotax 912ULS

I am starting a new thread titled “Vapor Lock RV-12 Rotax 912ULS” so that it will searchable and specific to this issue. On 4-6-21 I experienced vapor lock that caused severe vibration and power...
Forum: RV-12/RV-12iS 04-15-2021, 01:07 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Might even consider adding a louver to top...

Might even consider adding a louver to top cowling to extract heat… particularly during ground ops. Louver needs to be plastic so GPS antenna continues to “see” satellites.
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Forum: RV-12/RV-12iS 04-15-2021, 08:37 AM
Replies: 81
Views: 2,321
Posted By Piper J3
A work in progress... Thermocouple at left carb...

A work in progress...

Thermocouple at left carb float bowl is redundant, so I re-purposed it to measure temperature of fuel line where mechanical fuel pump splits at T-fitting to supply each...
Forum: RV-12/RV-12iS 04-14-2021, 01:41 PM
Replies: 81
Views: 2,321
Posted By Piper J3
I have asked moderators to start a new thread...

I have asked moderators to start a new thread RV-12/RV-12iS > Vapor Lock. I also asked that post #255 and up from this thread be transferred to the new Vapor Lock thread. So, hopefully that will be...
Forum: RV-12/RV-12iS 04-14-2021, 11:46 AM
Replies: 11
Views: 956
Posted By Piper J3
This just might be an “Oh Well…” situation. ...

This just might be an “Oh Well…” situation. Rotax 912 is really two separate power-plants that share a common crankshaft. Each power-plant has its own carburetor and it’s a great day if both work...
Forum: RV-12/RV-12iS 04-13-2021, 12:53 PM
Replies: 81
Views: 2,321
Posted By Piper J3
Two-channel temperature sensor is temporarily...

Two-channel temperature sensor is temporarily installed. Thermocouples pinch nicely between float bowl and bail wire. Total install time was 15 minutes. Runway too wet for flying today. Flight...
Forum: RV-12/RV-12iS 04-12-2021, 01:21 PM
Replies: 81
Views: 2,321
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 04-12-2021, 12:06 PM
Replies: 81
Views: 2,321
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: 16
Views: 2,139
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: 772
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
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: 81
Views: 2,321
Posted By Piper J3
Vapor Lock RV-12 Rotax 912ULS

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: 751
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: 1,714
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: 1,714
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: 629
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: 629
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: 629
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: 1,017
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: 534
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: 1,305
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: 3,700
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: 518
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: 518
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: 518
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: 518
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: 518
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: 2,144
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: 2,144
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...
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