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Search: Posts Made By: bjdecker
Forum: RV-7/7A Yesterday, 07:20 AM
Replies: 10
Views: 823
Posted By bjdecker
Hmmm...

Ref: DWG 20, 22, and 25

If this is a QB, I find interesting that you were able to access the F-605C & F-705H spacer, or anything else along the rear spar carry through assembly. Of RV-7 QB's I've...
Forum: RV Ongoing Maintenance Issues 10-19-2021, 05:27 PM
Replies: 16
Views: 359
Posted By bjdecker
Have you validated the RPM with an optical tach...

Have you validated the RPM with an optical tach device?
Forum: RV General Discussion/News 10-19-2021, 03:00 PM
Replies: 33
Views: 2,291
Posted By bjdecker
See...

See https://apps.savvyaviation.com/flights/5317030/33486f51-0ee3-4cd0-a2c8-ed7cdd22e085

Slight correction -- OAT was almost the same (+/- 4) and Baro was similiar between test series...

As I...
Forum: RV General Discussion/News 10-19-2021, 02:28 PM
Replies: 33
Views: 2,291
Posted By bjdecker
I am chasing a similar issue -- TAS in my...

I am chasing a similar issue -- TAS in my airplane (RV-7) displays about 9 knots lower than previous, similarly equipped RV-7. The results from the NTPS spreadsheets show a TAS (Calculated) of...
Forum: RV General Discussion/News 10-19-2021, 01:37 PM
Replies: 33
Views: 2,291
Posted By bjdecker
Thanks Galin, However, if I adjust the altimeter...

Thanks Galin, However, if I adjust the altimeter for local barometer it should be close, no? I know the barometer at field elevation is going to be different at altitude because of lapse rate,...
Forum: RV General Discussion/News 10-19-2021, 01:13 PM
Replies: 33
Views: 2,291
Posted By bjdecker
Is this due to inconsistencies in the geoid datum...

Is this due to inconsistencies in the geoid datum that the GPS uses to extrapolate MSL?

For what it's worth, I've found the WAAS GPS to be pretty accurate. I figure if it's good enough to do...
Forum: My RV Build Project 10-18-2021, 07:05 AM
Replies: 1
Views: 122
Posted By bjdecker
See...

See https://vansairforce.net/community/showthread.php?t=200172

Some/Most/All of us have run into this problem and devised cool workarounds for the original design -- Aluminum tab, Carbon Fiber, or...
Forum: RV-7/7A 10-18-2021, 06:59 AM
Replies: 10
Views: 823
Posted By bjdecker
Spot on Kyle; 19/32" makes quite a bit of...

Spot on Kyle; 19/32" makes quite a bit of difference here.
Forum: RV-7/7A 10-18-2021, 06:56 AM
Replies: 10
Views: 823
Posted By bjdecker
Make the trim AND file a bit more of a radius at...

Make the trim AND file a bit more of a radius at the top -- this will allow the rear spar to clear the AN470 rivet head that sits in between the two fuselage spar "tangs."

Also, when you insert and...
Forum: RV-7/7A 10-18-2021, 06:02 AM
Replies: 10
Views: 823
Posted By bjdecker
Re: Item #3 in your post. The rivets are shifted...

Re: Item #3 in your post. The rivets are shifted a bit toward the radius (forward) of the F-705E-L/R doublers as they nest inside the F-705D-L bulkhead side channels.

Just out of curiosity, did you...
Forum: RV Ongoing Maintenance Issues 10-17-2021, 05:59 PM
Replies: 5
Views: 751
Posted By bjdecker
I've seen some folks fashion a T-shape out of...

I've seen some folks fashion a T-shape out of .020" 2024 and use soft rivets &/or glass to bond to gear leg fairing.
Forum: RV Building Tips/Techniques 10-16-2021, 11:51 AM
Replies: 11
Views: 1,052
Posted By bjdecker
^^^ This ^^^

^^^ This ^^^
Forum: RV General Discussion/News 10-10-2021, 05:03 PM
Replies: 3
Views: 180
Posted By bjdecker
Metal...

If you have the skill, experience & english wheel(or a friend with all three) you can fabricate a set from .032 2024-T3...

The canopy aft edge follows a funky compound curve. Start big, work with...
Forum: Glass Cockpit 10-10-2021, 09:37 AM
Replies: 12
Views: 603
Posted By bjdecker
GSU 25 mounted to the back of the GDU 460...

GSU 25 mounted to the back of the GDU 460 PFD.

Pneumatic lines for GSU 25 extend forward and penetrate the F-768B-L through 3 SB 375-4 snap bushings.

Instrument panel is 1" taller (lower) than...
Forum: GPS 10-10-2021, 09:22 AM
Replies: 17
Views: 1,163
Posted By bjdecker
Richard -- thanks for the response. I have a...

Richard -- thanks for the response.

I have a set that was machined by a gentleman here in CenTex. The outside-the-skin profile matches that of the Van's rivet, with a .1875" threaded shank into a...
Forum: GPS 10-10-2021, 09:14 AM
Replies: 17
Views: 1,163
Posted By bjdecker
This ^^^ is interesting; down here, the OAT at...

This ^^^ is interesting; down here, the OAT at test altitude is 15C to 20C instead of 0C...
Forum: GPS 10-10-2021, 09:08 AM
Replies: 17
Views: 1,163
Posted By bjdecker
Sorry for the delay in responding -- we had to go...

Sorry for the delay in responding -- we had to go somewhere in the other aluminum toy for a few days :)

The TAS in this airplane has always "seemed" low (compared to last RV-7 with similar...
Forum: RV-7/7A 10-10-2021, 06:58 AM
Replies: 40
Views: 2,288
Posted By bjdecker
My .02 -- keep it on the panel/dash; key or...

My .02 -- keep it on the panel/dash; key or button.

The last thing you need/want is to inadvertently smash the start button on the stick while maneuvering...
Forum: GPS 10-06-2021, 07:58 AM
Replies: 17
Views: 1,163
Posted By bjdecker
How High am I?

[Data source - G3X Touch flight log, GTN650xi data log]

I have been chasing an apparent static system "problem" which results in erroneous readings in IAS/TAS.

I flew a number of GPS tracks...
Forum: RV-7/7A 10-05-2021, 06:06 PM
Replies: 21
Views: 2,799
Posted By bjdecker
Ahhh yes -- thanks Kyle. Unfortunately that...

Ahhh yes -- thanks Kyle.

Unfortunately that would interfere with the exit radius material. Also, it would seem that would impart more movement (read: stress) to the exhaust stacks as it is fixed to...
Forum: RV-7/7A 10-05-2021, 05:52 PM
Replies: 21
Views: 2,799
Posted By bjdecker
Gotcha -- I would need to engineer a new exhaust...

Gotcha -- I would need to engineer a new exhaust hangar "system"; round cross sections perpendicular to flow are-the-worst drag-wise. Maybe I can find a tear drop shape and use it for the...
Forum: RV-7/7A 10-05-2021, 04:49 PM
Replies: 21
Views: 2,799
Posted By bjdecker
Radiused...

Bent the "leading" edge over --- now, I think I'll remake the whole darn thing and roll the edge end-to-end.
Forum: Glass Cockpit 10-04-2021, 07:14 AM
Replies: 13
Views: 1,176
Posted By bjdecker
Just for reference...

...this slightly raised edge of paint around the static ports is worth 5KTS and 500FT @ 6500ft / 150KTS indicated...
Forum: RV-7/7A 10-03-2021, 07:31 PM
Replies: 21
Views: 2,799
Posted By bjdecker
Can do! I already had to "notch" it to clear the...

Can do! I already had to "notch" it to clear the throttle cable -- removing the material between the adel clamps shouldn't be an issue, aside from the hazards associated with working with stainless...
Forum: RV-14 10-03-2021, 07:26 PM
Replies: 6
Views: 899
Posted By bjdecker
Been there -- Done that... Sticky starter...

Been there -- Done that...

Sticky starter solenoid (not the starter relay). Usually seen when engine is hot. Others have seen a cold/cracked solder pool on this unit as well. Net effect -- it...
Forum: RV Ongoing Maintenance Issues 10-03-2021, 04:02 PM
Replies: 7
Views: 890
Posted By bjdecker
Hey Carl, Buss voltage was ~13.9Vdc until I...

Hey Carl,

Buss voltage was ~13.9Vdc until I turned the field off, then amps dropped to 0 and volts dropped to ~13.7Vdc. Re-energizing field, current amps went back to 52A and buss volts to 13.9V. ...
Forum: RV General Discussion/News 10-03-2021, 02:17 PM
Replies: 49
Sticky: Daily RV Pic
Views: 6,219
Posted By bjdecker
The View...

...just cannot be beat...
Forum: RV-7/7A 10-03-2021, 01:55 PM
Replies: 21
Views: 2,799
Posted By bjdecker
The BUMP...

Since I had the cowling off to do surgery on the alternator, I took the opportunity to upgrade the cowl exit ramp/bump from the aluminum version to stainless steel.

I made it a bit wider, taller and...
Forum: RV Ongoing Maintenance Issues 10-03-2021, 01:37 PM
Replies: 7
Views: 890
Posted By bjdecker
Alternator+Battery Misbehavior...

...

Started up the aircraft this morning and observed the usual & expected high current ( ~60A) indicating that the alternator was recharging the EarthX ETX 900 after its usual vigorous spinning of...
Forum: RV-7/7A 09-30-2021, 10:52 AM
Replies: 30
Views: 2,774
Posted By bjdecker
That sounds bad at first blush... ...but isn't...

That sounds bad at first blush...

...but isn't the gascolator located on the firewall? What about the engine-driven fuel pump attached to the <gasp> hot engine? And the carburetor or fuel servo? The...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-30-2021, 10:34 AM
Replies: 6
Views: 640
Posted By bjdecker
PM sent....

PM sent....
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-30-2021, 07:59 AM
Replies: 6
Views: 640
Posted By bjdecker
Buy the PC680 with the metal jacket, then...

Buy the PC680 with the metal jacket, then remove/repurpose the case -- that's all Van's does. (https://www.odysseybattery.com/products/ods-agm16lmj-battery-pc680mj/)
Forum: Glass Cockpit 09-29-2021, 05:23 PM
Replies: 4
Views: 537
Posted By bjdecker
Thank you Steve and Matthew, it does appear to...

Thank you Steve and Matthew, it does appear to be Magnetic Declination (Variation) playing havoc with my mental processes.

What I found "odd" was the displayed value on all of the screens (G3Xt,...
Forum: Glass Cockpit 09-29-2021, 05:43 AM
Replies: 4
Views: 537
Posted By bjdecker
Garmin G3X Touch - Interesting Issue

[Dual G3X touch, GTN 650Xi, GMC 307, GMU 11, some other stuff...]

In flight, AP set to "TRK" mode via the PFD AP status bar & on screen menu. HDG knob used to select TRK course. Selected TRK...
Forum: RV-7/7A 09-28-2021, 05:40 AM
Replies: 8
Views: 1,125
Posted By bjdecker
True - there are limits to the operation of any...

True - there are limits to the operation of any system.

But hey, give it a try, and see what you think.
Forum: RV-7/7A 09-28-2021, 05:19 AM
Replies: 8
Views: 1,125
Posted By bjdecker
It does rely on the interference fit/friction...

It does rely on the interference fit/friction applied between the counterbalance arm and tip fairing. Granted, I haven't parked in gale force winds at angles approaching 90 to the wind; but for the...
Forum: RV-7/7A 09-27-2021, 05:51 PM
Replies: 8
Views: 1,125
Posted By bjdecker
Gust Locks -- Redux

I was describing my solution to this problem to my friends at lunch last week, and they just couldn't grasp how you could use a beer can koozie as a rudder/elevator/aileron gust lock. So I had to...
Forum: Traditional Aircraft Engines 09-27-2021, 05:43 PM
Replies: 15
Views: 1,135
Posted By bjdecker
Here's some detail. Van's sells the BAF-8-IO360...

Here's some detail. Van's sells the BAF-8-IO360 kit, which is intended for the angle valve 200HP IO-360. Just add some additional pieces when you order...
Forum: RV-4 09-25-2021, 01:21 PM
Replies: 6
Views: 420
Posted By bjdecker
Typical Xenon flash tube strobes are powered by...

Typical Xenon flash tube strobes are powered by an external power supply that delivers the flash tube power.

The Red wire is the Anode, Black wire is Cathode, white (or clear) is the Trigger.

They...
Forum: RV General Discussion/News 09-24-2021, 02:08 PM
Replies: 19
Views: 1,859
Posted By bjdecker
Friends of ours in CenTex used Morton; still...

Friends of ours in CenTex used Morton; still going strong 25 years in.

https://mortonbuildings.com/

Good Luck!

B
Forum: Electrical Systems 09-23-2021, 06:46 AM
Replies: 73
Views: 13,324
Posted By bjdecker
Tim, I sent you a PM re: your AOG experience. By...

Tim, I sent you a PM re: your AOG experience.

By any chance do you have a blast tube pointed at the back-side of the alternator?
Forum: RV Building Tips/Techniques 09-22-2021, 01:54 PM
Replies: 13
Views: 874
Posted By bjdecker
De Rigueur for building an RV; CP 214 clones can...

De Rigueur for building an RV; CP 214 clones can be found for cheaper however -- look at Brown, Cleaveland, etc.
Forum: RV General Discussion/News 09-21-2021, 05:20 PM
Replies: 6
Views: 843
Posted By bjdecker
Before you cut holes...

I hope my response doesn't create an endless debate worthy of popcorn :)

Firstly, I am a big fan of Alan's products & services, however, in this case I think it's a solution in search of a problem...
Forum: RV-7/7A 09-20-2021, 06:00 PM
Replies: 6
Views: 685
Posted By bjdecker
Which engine?

IO-360-A,C, etc. (200HP) or IO-360-B,D,M, etc. (180HP)?
Forum: RV-14 09-20-2021, 04:38 PM
Replies: 11
Views: 964
Posted By bjdecker
Anytime -- just FF-00001 and 00001A.

Anytime -- just FF-00001 and 00001A.
Forum: RV-14 09-20-2021, 04:33 PM
Replies: 11
Views: 964
Posted By bjdecker
FF-00001, 1A, 1B

FF-00001, 1A, 1B
Forum: Glass Cockpit 09-20-2021, 02:56 PM
Replies: 2
Views: 303
Posted By bjdecker
Unfortunately, no -- there's no dynamic + logic...

Unfortunately, no -- there's no dynamic + logic combination available for RPM & MAP. Most folks just set a yellow arc on the RPM gauge and MAP.
Forum: Electrical Systems 09-20-2021, 11:54 AM
Replies: 73
Views: 13,324
Posted By bjdecker
Ok, I rechecked mine in-situ -- I used a simple...

Ok, I rechecked mine in-situ -- I used a simple compass in the vicinity of the alternator (bottom right of propeller spinner/cowl interface) to determine the presence/absence of a magnetic field --...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-18-2021, 11:02 AM
Replies: 6
Views: 766
Posted By bjdecker
From the parts manual, page 3-1, Figure 17, 6. ...

From the parts manual, page 3-1, Figure 17, 6. Lycoming P/N...
Forum: Traditional Aircraft Engines 09-18-2021, 08:29 AM
Replies: 6
Views: 1,679
Posted By bjdecker
Add a little baffle material to that gap behind...

Add a little baffle material to that gap behind #4. Can't hurt -- see pic.
Forum: Glass Cockpit 09-17-2021, 03:38 PM
Replies: 60
Views: 8,018
Posted By bjdecker
Audio Callouts.

Same experience here -- the "500" call-out is noticeably different than it was before. Obstacle, Sinkrate, Pull Up, etc. all seem the same however.
Forum: Electrical Systems 09-17-2021, 02:29 PM
Replies: 73
Views: 13,324
Posted By bjdecker
I'll recheck mine this weekend -- really confused...

I'll recheck mine this weekend -- really confused about what I was seeing earlier.
Forum: Electrical Systems 09-17-2021, 01:14 PM
Replies: 73
Views: 13,324
Posted By bjdecker
Just one more point, then I'm done -- fly your...

Just one more point, then I'm done -- fly your airplane how you want.

Watts = Volts * Amps
Horsepower = Watts/746 (1HP = 746W)

Ergo, when Alt Field is energized @ 13.2Vdc it will "burn" 66 Watts...
Forum: Electrical Systems 09-16-2021, 01:09 PM
Replies: 73
Views: 13,324
Posted By bjdecker
Interesting -- I had checked this on an...

Interesting -- I had checked this on an internally regulated PP AL12-60 a while back. As the field current is controlled by the regulator it could be a behavior of the regulator -OR- I could have...
Forum: Electrical Systems 09-16-2021, 12:05 PM
Replies: 73
Views: 13,324
Posted By bjdecker
The current draw on the field wire is essentially...

The current draw on the field wire is essentially 0 when the alternator isn't spinning.

The HP load is caused >after< the starter disengages and the alternator is trying to charge the battery (or...
Forum: RV-7/7A 09-15-2021, 08:33 AM
Replies: 5
Views: 387
Posted By bjdecker
What's changed? First - Understand & document...

What's changed?

First - Understand & document the electrical architecture of your aircraft:

1. 14v or 28v.
2. 1, 2 or More Batteries.
3. 1, 2 or More Alternators, Internal or External Regulation
4....
Forum: RV General Discussion/News 09-13-2021, 09:19 AM
Replies: 8
Views: 542
Posted By bjdecker
It is in the last link -- the SW10611R charts...

It is in the last link -- the SW10611R charts start at page 21 (or 23 / 66) and 10611S charts start on page 25 ( or 27 / 66). Aside from a relief cut on the front/top face of the 611S, they are the...
Forum: RV General Discussion/News 09-12-2021, 02:16 PM
Replies: 8
Views: 542
Posted By bjdecker
SW/Troy/Meggitt 10611R should fit the...

SW/Troy/Meggitt 10611R should fit the bill...

The 80001694 is a dual pass arrangement, equivalent to the SW 8432R/S and NOT the same as the Airflow Systems 20006A

See...
Forum: RV-14 09-09-2021, 01:09 PM
Replies: 20
Views: 2,521
Posted By bjdecker
Aluminum Mesh

I used a piece of aluminum window screen, about 3"x3" IIRC. Wrapped it over the NACA outlet, and used the SCEET duct & Breeze clamp to secure the entire assembly. No fuss, No muss, No bees, wasps,...
Forum: Glass Cockpit 09-09-2021, 12:47 PM
Replies: 60
Views: 8,018
Posted By bjdecker
Unfortunately, no. The GTX software update only...

Unfortunately, no. The GTX software update only works from a laptop running the Garmin Service tool connected to the GTX via the USB Type A/B cable. Make sure you wire that in when you do your...
Forum: RV-7/7A 09-03-2021, 02:04 PM
Replies: 9
Views: 2,460
Posted By bjdecker
If you had a spare, the unit would NOT have...

If you had a spare, the unit would NOT have failed :)
Forum: RV-7/7A 09-03-2021, 12:07 PM
Replies: 9
Views: 2,460
Posted By bjdecker
Alex, Did Herr Savier provide any root cause...

Alex,

Did Herr Savier provide any root cause information or just swap out boxes?

B
Forum: RV-14 08-31-2021, 02:57 PM
Replies: 16
Views: 1,508
Posted By bjdecker
From the installation docs...

The installation doc's for the AL12-EI60/C (or B), part #99-9900B & C revision F calls for a 1" blast tube, see page 2.

Document available...
Forum: RV-10 08-30-2021, 12:06 PM
Replies: 27
Views: 4,910
Posted By bjdecker
1. Slavish adherence to the STC/TSO for the...

1. Slavish adherence to the STC/TSO for the antennas
2. They needed a place to put the parachute + rocket motor and straps :)

:D
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