VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Search Forums
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 53 of 53
Search took 0.00 seconds.
Search: Posts Made By: Charlie12
Forum: RV-12/RV-12iS 11-25-2021, 11:57 AM
Replies: 5
Views: 1,399
Posted By Charlie12
gear leg corrosion

I didn't do a careful verification of my "facts" but what I think I have picked up over the last several years is that the gear legs are 7075 aluminum rather than the more common 2024. 7075 is...
Forum: RV-12/RV-12iS 09-10-2021, 10:23 PM
Replies: 5
Views: 649
Posted By Charlie12
coolant loss

My overflow tank level creeps down roughly 1/4 inch between annual inspections. I have checked carefully for leaks and have never found any.
Forum: RV-12/RV-12iS 09-10-2021, 10:15 PM
Replies: 9
Views: 1,428
Posted By Charlie12
tail tie down

An old rule of thumb (the practical kind you don't find in modern textbooks) in prop design is that a well-designed prop will produce about 4 pounds of static thrust per HP. That should get you in...
Forum: RV-12/RV-12iS 09-10-2021, 12:39 PM
Replies: 3
Views: 1,372
Posted By Charlie12
It's an interesting experience.

I was one of several volunteer mentors, mostly from Chapter 288, for a 2-year RV-12 build at Atlantic High School in Daytona Beach, FL. If anyone out there is wondering whether to volunteer, let me...
Forum: RV-12/RV-12iS 09-10-2021, 12:15 PM
Replies: 5
Views: 1,605
Posted By Charlie12
paint scheme layout

I scanned the 3-view in the KAI and then imported it into the Paint program that is included in Windows. It took some tedious pixel-by-pixel editing to clean it up but gave me a clean slate for...
Forum: RV-12/RV-12iS 09-01-2021, 01:03 PM
Replies: 39
Views: 7,285
Posted By Charlie12
screw spec per KAI

I posted this a couple days ago in another thread. Just trying to get the facts clear in my head. The current KAI for RV-12 posted on Van's website, p. 38-07, still says AN526C for the front six...
Forum: RV-12/RV-12iS 09-01-2021, 12:50 PM
Replies: 5
Views: 1,857
Posted By Charlie12
contact info

Jack, Congrats on the new airplane. I sent you a private message with my contact info if you want to get together.
Forum: RV-12/RV-12iS 08-29-2021, 02:54 PM
Replies: 19
Views: 3,154
Posted By Charlie12
screws at front of upper cowling

Scott says AN526 screws are "not what is recommended" and I don't disagree with the choice of AN525 instead, but... I have never received any communication from the factory recommending to change...
Forum: RV-12/RV-12iS 08-27-2021, 10:03 PM
Replies: 19
Views: 3,154
Posted By Charlie12
cowling screws

Scott is speaking from the factory so I am hesitant to disagree, but my KAI (p. 38-07) says AN526C832R8 and that is all I have ever used. I just had the cowling off for an oil change last week. ...
Forum: RV-12/RV-12iS 08-27-2021, 09:26 PM
Replies: 5
Views: 1,857
Posted By Charlie12
RV-12 to look at

I built my RV-12 basically solo and have 344 hours on it. I'd be happy to meet with you if you can't find someone closer. My hangar is at Deland (KDED). I am Tech Counselor for Chapter 635 at...
Forum: RV-12/RV-12iS 07-20-2021, 01:17 PM
Replies: 22
Views: 8,648
Posted By Charlie12
Pitot cover

I cut off a short piece of 2x2, rounded one end, drilled a hole in the unrounded end the size of the pitot tube, painted it red, and hung a "Remove before flight" banner on it. I needed it because...
Forum: RV-12/RV-12iS 05-13-2021, 03:09 PM
Replies: 50
Views: 10,128
Posted By Charlie12
fuel pump switch?

It's interesting how old threads fade away and then rise from the dead several years later. I'll restate what I posted long ago. When I took the Rotax inspection course the experienced instructor...
Forum: RV-12/RV-12iS 05-13-2021, 02:36 PM
Replies: 12
Views: 3,061
Posted By Charlie12
nose gear fork painted

I primed and painted my replacement fork. It looks just like Piper J3's photos. It seems to make no difference in how the parts fit together, so why not? In Florida bare aluminum has very little...
Forum: RV-12/RV-12iS 05-13-2021, 02:15 PM
Replies: 9
Views: 2,049
Posted By Charlie12
wing weight

I actually weighed mine when I was determining the weight and CG location of the aircraft minus wings, so that I could be confident about securing it to the trailer for transport to the airport the...
Forum: RV-12/RV-12iS 05-13-2021, 01:48 PM
Replies: 9
Views: 1,767
Posted By Charlie12
fuel pump switch

I put a switch on the fuel pump on my aircraft based on generalized Rotax advice that turned out to be inappropriate for the tank location on the RV-12. So the pump is always on when in flight.

But...
Forum: RV-12/RV-12iS 02-24-2021, 08:46 PM
Replies: 12
Views: 2,599
Posted By Charlie12
draining carb float bowl

BTW, I had serious trouble from leaving 93E10 fuel in my float bowls for about ten weeks while I was completing my build. The little transverse holes in the idle jet on my left carb plugged up with...
Forum: RV-12/RV-12iS 02-24-2021, 08:18 PM
Replies: 12
Views: 2,599
Posted By Charlie12
fuel tank draining

I routinely use a process similar to that described by PiperJ3. I temporarily replace the gascolator drain valve with a brass pipe nipple that has a 1/4-inch tube fitting on the other end and slide...
Forum: RV-12/RV-12iS 02-24-2021, 07:58 PM
Replies: 18
Views: 2,761
Posted By Charlie12
Rotax courses

I second the opinions posted by several others. My RV-12 first flight was in 2016 and while I was building it I both took the Rainbow course at Apopka, FL, to get my repairman certificate and went...
Forum: RV-12/RV-12iS 11-25-2020, 10:10 PM
Replies: 8
Views: 3,362
Posted By Charlie12
RPM drops

At 4000 RPM runup check my RPM drops have always been around 130-140, nearly equal on both ignition systems, ever since brand new. It varies 20-30 RPM at different ambient temp. Carb overhaul at...
Forum: RV-12/RV-12iS 11-16-2020, 10:45 PM
Replies: 31
Views: 11,356
Posted By Charlie12
do it

It's odd how such a simple issue can get you the wrong answer from an official person. The DAR who did my airworthiness cert 4 years ago told me that E-LSA is built as an exact copy of an FAA...
Forum: RV-12/RV-12iS 11-16-2020, 10:26 PM
Replies: 6
Views: 3,043
Posted By Charlie12
new "Rev. B" floats

I just received a set of carb floats from Marvel-Schebler. The invoice lists them as "Rev B" of part no. MS80-430. The top has corners chamfered a bit compared to the original version shown in the...
Forum: RV-12/RV-12iS 11-11-2020, 09:02 PM
Replies: 39
Views: 11,425
Posted By Charlie12
working holes in aluminum

At the risk of being more detailed than anyone actually wants to hear, I spent 45 years as a structural design engineer in the aircraft world, 30 years of it teaching aircraft design in college. My...
Forum: RV-12/RV-12iS 11-11-2020, 08:33 PM
Replies: 17
Views: 5,566
Posted By Charlie12
Lexan window crazing due to fuel splash?

I have a fuel cap with no vent hole and a tank vent line internal to the fuselage. The internal vent line was a design change that became available while I was building, probably 2015, so I put one...
Forum: RV-12/RV-12iS 11-06-2020, 08:23 PM
Replies: 6
Views: 3,043
Posted By Charlie12
Marvel-Schebler carb floats

Previous threads on Rotax carb floats may have died of old age---I can't find them. I am again starting my annual condition inspection and would really like to try the Marvel-Schebler epoxy carb...
Forum: RV-12/RV-12iS 11-06-2020, 08:12 PM
Replies: 39
Views: 11,425
Posted By Charlie12
fat LP-4s?

I had similar challenges riveting my RV-12 a few years ago. Builder support suggested that the pre-punched holes sometimes are a little undersize when the machine punch gets worn, which makes sense...
Forum: RV-12/RV-12iS 03-28-2020, 10:32 PM
Replies: 20
Views: 6,420
Posted By Charlie12
materials are expensive

A tidbit to clarify where the bottom end of the cost scale is. I painted my own RV-12 just for the challenge of doing it. When I went to the local PPG paint store to begin gathering materials I was...
Forum: RV-12/RV-12iS 03-02-2020, 05:30 PM
Replies: 15
Views: 4,543
Posted By Charlie12
wear of spar rivets

It is really hard to be sure what you are looking at in close-up photos but it appears that the worn rivet heads are on the front side of the left wing spar. The left spar slides into the fuselage...
Forum: RV-12/RV-12iS 03-02-2020, 04:34 PM
Replies: 26
Views: 6,893
Posted By Charlie12
plastic plugs

In line with Finn's reminder about mud daubers, I searched around online and did manage to find white plastic push-in cap plugs that fit the tiedown holes and protrude very little on the outside. I...
Forum: RV-12/RV-12iS 03-02-2020, 03:50 PM
Replies: 16
Views: 4,924
Posted By Charlie12
lock-open gascolator drain

I bought a lock-open fitting for my gascolator drain because I had one or a couple of other airplanes and liked it. But when I tried to install it on my RV-12 there was interference which kept me...
Forum: RV-12/RV-12iS 03-01-2020, 03:20 PM
Replies: 8
Views: 2,038
Posted By Charlie12
maintenance courses

I took the 2-day Rotax 912 inspection course at Lockwood in Sebring, FL, while I was building my RV-12 and found it informative and useful. But it gives you official permission to work only on the...
Forum: RV-12/RV-12iS 03-01-2020, 02:52 PM
Replies: 6
Views: 2,330
Posted By Charlie12
main gear axle nuts don't have washers

You probably have found this answer by now, but in case you haven't: contrary to the drawing in the KAI, the main gear axle nuts for my Matco wheels/axles do not have a separate washer. The nut is...
Forum: RV-12/RV-12iS 02-07-2020, 07:47 PM
Replies: 26
Views: 6,893
Posted By Charlie12
tie down eyebolts

As several others mentioned, I leave the tail tiedown eyebolt installed permanently so that I have a tail skid. A very experienced CFI told me years ago that if you never bump the tail GENTLY on the...
Forum: RV-12/RV-12iS 01-27-2019, 03:47 PM
Replies: 8
Views: 2,103
Posted By Charlie12
filling small voids

The voids in your photos are structurally insignificant and can be filled pretty much any way you like. After years of teaching college students how to do this kind of stuff, I developed a...
Forum: RV-12/RV-12iS 01-27-2019, 03:25 PM
Replies: 12
Views: 3,639
Posted By Charlie12
flaperon position holder

I made a simple device that holds the tip of the flaperon firmly in place when the wing is off. Start with 2 scraps of 2x4 about 6 inches long. Hold one against the end of the flaperon and trace...
Forum: RV-12/RV-12iS 01-27-2019, 03:03 PM
Replies: 8
Views: 1,999
Posted By Charlie12
loose connector?

I started having occasional erratic temp indications on my left EGT at about 70 hours. Re-crimping the wire connectors up near the firewall penetration fixed it. At my next condition inspection I...
Forum: RV-12/RV-12iS 01-27-2019, 02:47 PM
Replies: 14
Views: 5,573
Posted By Charlie12
binder

I found a 2" slant D-ring at Office Depot. It just fits the entire package of drawings. Slant ring format that opens on the side saves a lot of wear on the holes in the sheets.
Forum: RV-12/RV-12iS 01-12-2019, 10:09 PM
Replies: 7
Views: 2,166
Posted By Charlie12
Vertical stab gap

Mine has roughly 1/16 gap all the way around the bottom edge. Too small to squeeze a rubber channel into. I would worry about vibration wearing grooves into the tailcone skin if the stab skin...
Forum: RV-12/RV-12iS 01-07-2019, 10:00 AM
Replies: 35
Views: 9,811
Posted By Charlie12
switch recommendation

The instructor's recommendation for an on/off switch was a general observation on Rotax 912 operating requirements. He did not know why Van's chose not to include a switch on the RV-12 but said the...
Forum: RV-12/RV-12iS 01-06-2019, 10:27 PM
Replies: 35
Views: 9,811
Posted By Charlie12
short surges of low fuel pressure

I installed the later-design fuel tank vent line, so that is not an issue. I also added an on/off switch for the electric fuel pump, at the recommendation of instructor in my Rotax iRMT class. For...
Forum: RV-12/RV-12iS 12-05-2018, 11:12 AM
Replies: 19
Views: 4,039
Posted By Charlie12
E-LSA

I had my airworthiness inspection as E-LSA in July 2016 followed by first flight a few weeks later. 168 hours now. To me a big advantage of E-LSA is the abbreviated flight test requirement. I have...
Forum: RV-12/RV-12iS 11-27-2018, 09:10 PM
Replies: 254
Views: 76,032
Posted By Charlie12
pin position

My new, dry 861 188 floats (shorter brass tube slider) all floated with lower side of the pin just touching the fuel surface. Again, 3.13-3.16 g each when dry. This seems to be about as good as it...
Forum: RV-12/RV-12iS 11-27-2018, 11:07 AM
Replies: 254
Views: 76,032
Posted By Charlie12
more info tidbits

In my original post (#19) there is a typo. I replaced the original 861 182 floats per SB in 10/2015 not 10/2016. The engine had never been fueled at that point. When I experienced fuel dripping...
Forum: RV-12/RV-12iS 11-21-2018, 01:57 PM
Replies: 254
Views: 76,032
Posted By Charlie12
another data sequence

My engine came with 861 182 floats in 2015. Per Service Bulletin I replaced them 10/2016 with 861 184 (2 dots) before ever running the engine. After a smooth first flight in 9/2016 I found fuel...
Forum: RV-12/RV-12iS 11-21-2018, 12:22 PM
Replies: 10
Views: 2,187
Posted By Charlie12
I weighed mine wings-off to decide how to secure...

I weighed mine wings-off to decide how to secure it on the trailer for transport to the airport. It was 590.2 lb. and CG arm = 77.53 in. aft of datum. That is CG 16.57 in. fwd of main gear, 47.33...
Forum: RV-12/RV-12iS 09-07-2018, 10:47 AM
Replies: 5
Views: 1,812
Posted By Charlie12
Maybe I shouldn't reply without going to my...

Maybe I shouldn't reply without going to my hangar to look. But after the crescent moon bending process to get the first set in, I think I was able to just shorten the cotter pin with wire cutters...
Forum: RV-12/RV-12iS 08-21-2017, 05:21 PM
Replies: 17
Views: 10,294
Posted By Charlie12
stab bearings slipping

I actually had the bearings slip sideways enough to make the HS skin rub against the left side tailcone skin. It happened soon after assembly, before I even made my first flight. I whacked the end...
Forum: RV-12/RV-12iS 04-26-2015, 04:50 PM
Replies: 43
Views: 12,880
Posted By Charlie12
FYI here's a relatively current status on the...

FYI here's a relatively current status on the floats. I was at Lockwood in mid April for the Rotax service course. They had no floats in stock and did not know when they would get more, but were...
Forum: RV-12/RV-12iS 04-26-2015, 04:31 PM
Replies: 29
Views: 9,044
Posted By Charlie12
I agree. That's the kind of safety net that I...

I agree. That's the kind of safety net that I would prefer to see.

But on a 3/8 bolt the area that would have to fail in shear to pull out the threads is pretty big. A few hundred pounds tension...
Forum: RV-12/RV-12iS 04-25-2015, 11:09 PM
Replies: 29
Views: 9,044
Posted By Charlie12
The KAI says jacking the plane at the wing...

The KAI says jacking the plane at the wing tiedowns is OK. If you can jack it you can lift it. It's the same applied loads and the same supporting structure. It would make me feel uncomfortable to...
Forum: RV-12/RV-12iS 04-15-2015, 03:15 PM
Replies: 14
Views: 4,833
Posted By Charlie12
I am still puzzled by the brightness of the green...

I am still puzzled by the brightness of the green light on both the master switch and the avionics switch. Master goes bright green when turned on but stays bright for only a second or two. After...
Forum: RV-12/RV-12iS 04-15-2015, 02:46 PM
Replies: 2
Views: 1,473
Posted By Charlie12
Ver 12.0 update

I am not comfortable with this process and absolutely do not claim to be knowledgeable. But I downloaded and unzipped 12.0, copied it to the USB stick Dynon sent, plugged it in under the Skyview,...
Forum: RV-12/RV-12iS 04-15-2015, 02:34 PM
Replies: 9
Views: 3,631
Posted By Charlie12
I put my wings on for the first time a few days...

I put my wings on for the first time a few days ago. I had significant interference between the top of the spars and the top of the rectangular opening on the side skin on both sides (maybe 1/16...
Forum: RV-12/RV-12iS 04-10-2015, 06:30 PM
Replies: 14
Views: 4,833
Posted By Charlie12
avionics switch always lighted

tomkk forwarded an email to me from Van's engineering. It says there is a design glitch on single EFIS panels due to a wiring decision made when accommodating dual EFIS displays. I did the...
Showing results 1 to 53 of 53

 
Forum Jump

All times are GMT -6. The time now is 02:45 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.