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Search: Posts Made By: Piper J3
Forum: RV-12/RV-12iS Today, 04:33 PM
Replies: 320
Views: 313,021
Posted By Piper J3
5 KPH is a lot – almost 5% of cruise speed. I...

5 KPH is a lot – almost 5% of cruise speed. I don't think I see that kind of improvement with all three pressure-recovery wheel fairings. RV-12 is not a fast machine that would benefit from a lot...
Forum: RV-12/RV-12iS 04-19-2019, 09:09 PM
Replies: 128
Views: 13,432
Posted By Piper J3
I did some searching today for coatings that are...

I did some searching today for coatings that are impervious to gasoline. One company I contacted (Klass Kote Quality Coatings Division, Eagan, Minnesota) replied back as follows:

I asked... Do you...
Forum: RV-12/RV-12iS 04-19-2019, 01:27 PM
Replies: 128
Views: 13,432
Posted By Piper J3
Exactly. I'm pretty sure the absorbed fuel does...

Exactly. I'm pretty sure the absorbed fuel does eventually "bake" out. I've been thinking about this for a while. Maybe conformal coating used for electronic circuit boards. Don't know if it's...
Forum: RV-12/RV-12iS 04-19-2019, 01:11 PM
Replies: 128
Views: 13,432
Posted By Piper J3
Dave Any chance you could send me one or two...

Dave

Any chance you could send me one or two sets of your old heavy floats. I still want to experiment and see if I can't hollow out the float and leave a large air bubble in the center. Long...
Forum: RV-12/RV-12iS 04-19-2019, 01:04 PM
Replies: 128
Views: 13,432
Posted By Piper J3
3 sets x $300/4 floats = $900 and it isn't even...

3 sets x $300/4 floats = $900 and it isn't even summer flying season yet...
Forum: RV-12/RV-12iS 04-19-2019, 01:00 PM
Replies: 5
Views: 430
Posted By Piper J3
Actually, the towbar accomplishes both tasks. ...

Actually, the towbar accomplishes both tasks. Rudder pedals for sure... and then take the velcro strap and cinch the closed end of "v" around the stick. Also, I put a wrap of black electrical tape...
Forum: RV-12/RV-12iS 04-19-2019, 02:15 AM
Replies: 128
Views: 13,432
Posted By Piper J3
Further update to post #96… I emailed Marvel...

Further update to post #96…

I emailed Marvel Schebler and again got no response from them. How can a company in today’s economy have such poor (non-existent) customer relations? Anyway, my friend...
Forum: RV-12/RV-12iS 04-17-2019, 07:45 AM
Replies: 24
Views: 4,995
Posted By Piper J3
007 - Don't bruise the oil...

007 - Don't bruise the oil...
Forum: RV-12/RV-12iS 04-16-2019, 10:07 AM
Replies: 24
Views: 4,995
Posted By Piper J3
My wife says the $50 bill in my wallet is going...

My wife says the $50 bill in my wallet is going to expire soon and I should buy a nice dress for her that's on sale at Macy's...
Forum: RV-12/RV-12iS 04-16-2019, 02:28 AM
Replies: 24
Views: 4,995
Posted By Piper J3
This thread reminded me (my age is showing) I had...

This thread reminded me (my age is showing) I had a case of Aeroshell left over from the 70's. Oil "can" was actually paper back then. I was cleaning out the garage last summer and found the case...
Forum: RV-12/RV-12iS 04-15-2019, 03:01 PM
Replies: 320
Views: 313,021
Posted By Piper J3
I can speak with a fair amount of authority about...

I can speak with a fair amount of authority about J-3's having owned one for 23 years and some 1100 flying hours. The only thing wheel pants do on a Cub is keep mud from flinging onto the bottom of...
Forum: RV-12/RV-12iS 04-15-2019, 01:16 PM
Replies: 6
Views: 615
Posted By Piper J3
It could also be a harmonic frequency where...

It could also be a harmonic frequency where things start to resonate. I used to own an Aeronca Chief 11AC that had a McCauley metal prop on a Cont A65-8. The prop had a restriction to not operate...
Forum: RV-12/RV-12iS 04-15-2019, 01:02 PM
Replies: 24
Views: 1,806
Posted By Piper J3
Big Brother...

Big Brother...
Forum: RV-12/RV-12iS 04-15-2019, 01:45 AM
Replies: 320
Views: 313,021
Posted By Piper J3
How shocked were you? This can't add significant...

How shocked were you? This can't add significant airspeed. Nose strut is very small and airspeed in low 100 knots doesn't gain very much from little bits of aerodynamic cleanup.
Forum: RV-12/RV-12iS 04-15-2019, 01:37 AM
Replies: 6
Views: 615
Posted By Piper J3
Can't post individual cyl's. Rotax 912 has only...

Can't post individual cyl's. Rotax 912 has only two EGT's - one for L and one for R. They are mounted in the rear exhaust on each side.
Forum: VAF Classifieds (posts in here deleted after 30 days) 04-14-2019, 05:25 PM
Replies: 0
Views: 132
Posted By Piper J3
WTB Bruce's Canopy Cover for RV-12

WTB Bruce's Canopy Cover for RV-12
Forum: RV-12/RV-12iS 04-13-2019, 04:49 PM
Replies: 6
Views: 615
Posted By Piper J3
Some thoughts on mid-range RPM vibration…

I have had a flakey left EGT for a while and recently replaced the thermocouple sensor (Dynon EGT, Hose Clamp, 0.75-1.25”, Rotax SKU: #100405-001). I also did a fresh carb sync with a digital...
Forum: RV-12/RV-12iS 04-11-2019, 05:42 PM
Replies: 128
Views: 13,432
Posted By Piper J3
See my post #96 above where I explain how we...

See my post #96 above where I explain how we removed the top cowling and ran the electric fuel pump to discover fuel pouring out of the right carb air filter. Luckily, no fire when fuel overflowed...
Forum: RV-12/RV-12iS 04-09-2019, 01:32 PM
Replies: 128
Views: 13,432
Posted By Piper J3
It would be relatively easy to check buoyancy and...

It would be relatively easy to check buoyancy and float actuator pin levels by “floating” a set of <7-gram Bing Vs. stock Marvel Schebler in a bench setup using the Bing float bowl. Simply measure...
Forum: RV-12/RV-12iS 04-09-2019, 10:35 AM
Replies: 128
Views: 13,432
Posted By Piper J3
Joe Imagine a boat floating in water where...

Joe

Imagine a boat floating in water where waterline is 2’ below the deck. Now suppose you pump a lot of fuel onboard… the water line raises and the boat is lower in the water. Conversely, if you...
Forum: RV-12/RV-12iS 04-09-2019, 03:01 AM
Replies: 128
Views: 13,432
Posted By Piper J3
Thinking Outside the Box…

The Marvel Schebler floats apparently are heavier than the 7 gram Rotax spec and will most likely cause fuel level to be high in the float bowl.

I have an idea to fix this. Marvel Schebler says...
Forum: RV-12/RV-12iS 04-09-2019, 12:19 AM
Replies: 7
Views: 1,168
Posted By Piper J3
The 912 has a separate coil on the back of the...

The 912 has a separate coil on the back of the engine that powers the capacitive discharge ignition independent of the battery. Similar to magneto in that the engine has to be spinning to...
Forum: RV-12/RV-12iS 04-08-2019, 06:46 PM
Replies: 7
Views: 1,168
Posted By Piper J3
Unit looks too tall to fit under RV-12 cowling...

Unit looks too tall to fit under RV-12 cowling...
Forum: RV-12/RV-12iS 04-07-2019, 04:02 PM
Replies: 128
Views: 13,432
Posted By Piper J3
You guessed it… new member here. Yesterday I...

You guessed it… new member here. Yesterday I flew with my friend in his 1-year old RV-12 S-LSA with 130TT. I smelled a whiff of gasoline on take-off and on initial climb. We flew 30 miles and...
Forum: RV-12/RV-12iS 04-05-2019, 09:41 AM
Replies: 3
Views: 676
Posted By Piper J3
Louis Zamperini lived in Torrance, CA. Must be...

Louis Zamperini lived in Torrance, CA. Must be a good place...

Worth searching if you don't know who Louie is.
Forum: Alternative Engines 04-05-2019, 05:42 AM
Replies: 352
Views: 43,340
Posted By Piper J3
Charlie I really enjoy following your progress. ...

Charlie

I really enjoy following your progress. You get a lot done in short order. It's amassing what people accomplish these days. When I was a kid the talk of the neighborhood was a guy...
Forum: RV-12/RV-12iS 04-03-2019, 06:45 AM
Replies: 3
Views: 528
Posted By Piper J3
No boots - open connectors. At condition...

No boots - open connectors. At condition inspection I spray the connectors with contact cleaner/lubricant. Works good with no electrical problems - 400TT.
Forum: RV-12/RV-12iS 04-02-2019, 08:14 AM
Replies: 9
Views: 1,120
Posted By Piper J3
I never considered that "retreaded tread" could...

I never considered that "retreaded tread" could be harder rubber than sidewall. Might explain why tires are wearing so well. I thought it was my superior airmanship skills... :D

I just rec'd email...
Forum: RV-12/RV-12iS 04-01-2019, 02:44 PM
Replies: 9
Views: 1,120
Posted By Piper J3
Shouldn't be a problem. These tires are 6-ply,...

Shouldn't be a problem. These tires are 6-ply, 120 mph speed, and 1800# load rating.
Forum: RV-12/RV-12iS 04-01-2019, 07:50 AM
Replies: 9
Views: 1,120
Posted By Piper J3
I did communicate with Matco and I’m aware that...

I did communicate with Matco and I’m aware that they offer electroless nickel plating as an option. Electroless nickel plating is primarily used for corrosion resistance and does not have the wear...
Forum: RV-12/RV-12iS 04-01-2019, 12:39 AM
Replies: 9
Views: 1,120
Posted By Piper J3
Some Thoughts on Tires & Brakes…

I fly from a private grass strip in northern Ohio. Needless to say, not much flying in the winter months. So, the spring ritual is to look over the machine really good while I wait for the ground...
Forum: RV-12/RV-12iS 03-26-2019, 04:36 PM
Replies: 14
Views: 1,963
Posted By Piper J3
If you're building E-LSA you need to follow plans...

If you're building E-LSA you need to follow plans 100% without alterations prior to AW inspection.
Forum: RV-12/RV-12iS 03-25-2019, 06:37 PM
Replies: 30
Views: 3,520
Posted By Piper J3
Is there resolution on your vibration problem?

Is there resolution on your vibration problem?
Forum: RV-12/RV-12iS 03-25-2019, 09:07 AM
Replies: 9
Views: 1,569
Posted By Piper J3
Another idea to satisfy your curiosity… fly a...

Another idea to satisfy your curiosity… fly a radio-control low-wing airplane that has individual servos controlling the ailerons. Program a switch on your transmitter so you can shut off one...
Forum: RV-12/RV-12iS 03-25-2019, 06:54 AM
Replies: 10
Views: 1,158
Posted By Piper J3
I believe your best option is to pre-heat the...

I believe your best option is to pre-heat the engine before starting. This is best for the engine and significantly reduces warm-up run time. I have E-Z HEAT 912 engine pre-heater which I control...
Forum: RV-12/RV-12iS 03-24-2019, 04:44 PM
Replies: 9
Views: 1,569
Posted By Piper J3
My guess is the flaperon with the broken weld...

My guess is the flaperon with the broken weld would probably trail in the slip stream. The problem would be with the other wing with the "working" flaperon. Here would have drag from the working...
Forum: RV-12/RV-12iS 03-20-2019, 10:30 AM
Replies: 13
Views: 1,871
Posted By Piper J3
I assume you have VR mounted on firewall shelf...

I assume you have VR mounted on firewall shelf under cowling. A third option not requiring cutting of the painted cowling... install John Deere VR in same location as Ducati. Search this forum for...
Forum: RV-12/RV-12iS 03-18-2019, 09:31 AM
Replies: 10
Views: 1,363
Posted By Piper J3
As a data point, I have E-Z HEAT 912 engine...

As a data point, I have E-Z HEAT 912 engine pre-heater which consists of two silicone heater pads – one for bottom of crankcase and the other wraps around bottom of oil tank. I have a remote...
Forum: RV-12/RV-12iS 03-17-2019, 11:31 AM
Replies: 8
Views: 791
Posted By Piper J3
I wrap my right front exhaust pipe because I do...

I wrap my right front exhaust pipe because I do not like the oil hose passing through the exhaust elbow. I've never heard of a strap hanger for the hose failing but it could happen, and if it did,...
Forum: RV-12/RV-12iS 03-17-2019, 08:46 AM
Replies: 10
Views: 1,363
Posted By Piper J3
About what I was expecting to hear except for the...

About what I was expecting to hear except for the ignition modules. Maybe I should start saving for a Christmas fund...

Other threads on this forum talk about prop balancing and mid-range...
Forum: RV-12/RV-12iS 03-17-2019, 06:26 AM
Replies: 30
Views: 3,520
Posted By Piper J3
I don't know if re-clocking the prop will have...

I don't know if re-clocking the prop will have any effect. The gearbox ratio is 2.43:1 which means it is a "hunting tooth frequency" to distribute wear. The odd gearbox ratio constantly changes...
Forum: RV-12/RV-12iS 03-16-2019, 05:47 PM
Replies: 29
Views: 3,039
Posted By Piper J3
Airplanes don't have dashboards...

Airplanes don't have dashboards...
Forum: RV-12/RV-12iS 03-16-2019, 05:43 PM
Replies: 10
Views: 1,363
Posted By Piper J3
Fantastic accomplishment. I own SN120058 but...

Fantastic accomplishment. I own SN120058 but only have 400TT.

Can you tell us you experience with the Rotax 912ULS over the 1300 hours of operation?

Major maintenance?
Oil and fuel type...
Forum: Alternative Engines 03-16-2019, 02:56 AM
Replies: 352
Views: 43,340
Posted By Piper J3
Continued best luck... I've been following your...

Continued best luck... I've been following your progress for several months. Wish I lived closer so I could come and take first hand look.
Forum: RV-12/RV-12iS 03-15-2019, 03:27 PM
Replies: 22
Views: 2,114
Posted By Piper J3
You're the guy that was an expert on Rotax...

You're the guy that was an expert on Rotax gearbox and tuning last week but with very little actual Rotax experience as I recall. Perhaps a Kitfox would suit you very well indeed...
Forum: RV-12/RV-12iS 03-15-2019, 09:16 AM
Replies: 8
Views: 791
Posted By Piper J3
I can't view your photo. In any event, there is...

I can't view your photo. In any event, there is no radiator hose on the right side of the engine. Radiator, and associated hoses, are on left side of engine. Perhaps you mean oil hose that routes...
Forum: RV-12/RV-12iS 03-14-2019, 02:41 PM
Replies: 22
Views: 2,114
Posted By Piper J3
Wow, somebody's lucky day... I bought my 12...

Wow, somebody's lucky day...

I bought my 12 from original builder with 48TT. Seller and I live in same state so no personal property or sales taxes needed to be paid. Now have over 400TT on this...
Forum: RV-12/RV-12iS 03-10-2019, 12:49 PM
Replies: 6
Views: 1,057
Posted By Piper J3
Excellent choice... I'm going to pull together...

Excellent choice...

I'm going to pull together a lot of 12 guys in Ohio and neighboring states this summer. We'll hold a spot open for you. In the meantime, hopefully you can grab an open seat...
Forum: RV-12/RV-12iS 03-03-2019, 12:23 PM
Replies: 22
Views: 3,351
Posted By Piper J3
I was going to sit on the sidelines, but here...

I was going to sit on the sidelines, but here goes…

I don’t think any fingers need pointing. Most 912 operators (me included) are enjoying very good service life with very little maintenance. I...
Forum: RV-12/RV-12iS 03-03-2019, 02:10 AM
Replies: 22
Views: 3,351
Posted By Piper J3
NinerBikes - 82 posts VAF Mtn Biking, Fly...

NinerBikes -

82 posts VAF

Mtn Biking, Fly fishing, Ham Radio

Wants to get a sport pilot's license

No direct Rotax experience, yet resident expert
Forum: RV-12/RV-12iS 03-02-2019, 06:43 PM
Replies: 22
Views: 3,351
Posted By Piper J3
This sounds like a more plausible explanation for...

This sounds like a more plausible explanation for a mid-range vibration issue. The 912 is really two separate engine powerplants that share a common crankshaft and prop reduction gearbox. Each half...
Forum: RV-12/RV-12iS 03-01-2019, 10:36 AM
Replies: 30
Views: 3,520
Posted By Piper J3
It's going to be interesting to see if wear on...

It's going to be interesting to see if wear on the cam angle surfaces indeed causes vibration in mid-range. I'm kind of thinking it’s a stretch...
Forum: RV-12/RV-12iS 03-01-2019, 12:08 AM
Replies: 30
Views: 3,520
Posted By Piper J3
What was the condition of the magnetic gearbox...

What was the condition of the magnetic gearbox inspection plug? Did it have excessive metal shavings on it?

I wonder if previous owner used incorrect oil not approved by Rotax for gearbox engine?
Forum: RV-12/RV-12iS 02-25-2019, 12:26 PM
Replies: 128
Views: 13,432
Posted By Piper J3
I'm thinking the experiment that needs to be done...

I'm thinking the experiment that needs to be done would be to “float” a Bing and MS in an open dish of gasoline (93E10 or 100LL). Use a piece of piano wire as a guide through the float bushing so...
Forum: RV-12/RV-12iS 02-23-2019, 10:44 AM
Replies: 20
Views: 6,796
Posted By Piper J3
You might want to consider a magnetic charger USB...

You might want to consider a magnetic charger USB charging transfer cable - $8 on eBay. If the suction cup fails and the unit drops to the floor the cable will disconnect and not damage the charging...
Forum: RV-12/RV-12iS 02-21-2019, 03:27 PM
Replies: 128
Views: 13,432
Posted By Piper J3
Tom I’m re-reading the entire “float” thread...

Tom

I’m re-reading the entire “float” thread again and I have a question on your post…

You say that the MS (blue) float has the pin located at a different height compared to the black Bing float –...
Forum: ADS-B 02-21-2019, 12:32 PM
Replies: 120
Views: 20,888
Posted By Piper J3
As mentioned in post above… I finally got to fly...

As mentioned in post above… I finally got to fly after installing beta software back in November. Targets and Wx looked solid. I requested a PAPR and got FAA reply that flight didn’t generate a...
Forum: RV-12/RV-12iS 02-21-2019, 12:13 PM
Replies: 9
Views: 1,034
Posted By Piper J3
How much is a tad overweight?

How much is a tad overweight?
Forum: RV-12/RV-12iS 02-21-2019, 12:27 AM
Replies: 9
Views: 1,034
Posted By Piper J3
Guaranteed not to sink? Here we go...

Guaranteed not to sink?

Here we go again...

https://i.postimg.cc/hjs3Z6G0/Screenshot-2019-02-21-02-23-50-333.png (https://postimages.org/)
Forum: RV-12/RV-12iS 02-17-2019, 01:08 PM
Replies: 128
Views: 13,432
Posted By Piper J3
Were they blue color or black color?

Were they blue color or black color?
Forum: RV-12/RV-12iS 02-17-2019, 09:01 AM
Replies: 44
Views: 3,951
Posted By Piper J3
Dale Just for a data point... do you preheat...

Dale

Just for a data point... do you preheat engine in the winter?
Forum: RV-12/RV-12iS 02-17-2019, 08:13 AM
Replies: 44
Views: 3,951
Posted By Piper J3
No, if you're building experimental airplane,...

No, if you're building experimental airplane, then only Annual Condition Inspection is required. 100 hour inspection is not required.

Also, if you're building your RV-12 as E-LSA (not EAB), then...
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