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Search: Posts Made By: rocketbob
Forum: RV Ongoing Maintenance Issues Yesterday, 09:07 AM
Replies: 26
Views: 1,857
Posted By rocketbob
My thought is you don't want any coked oil...

My thought is you don't want any coked oil remaining in the guides. The ball hone adds a crosshatch which helps retain oil. Any of the guides I have cleaned up have never exhibited subsequent...
Forum: RV Ongoing Maintenance Issues Yesterday, 08:39 AM
Replies: 26
Views: 1,857
Posted By rocketbob
Reamers dont get everything out of the guides...

Reamers dont get everything out of the guides because the guides wear oblong on opposite sides at both ends. A small Brush Research ball hone works way better.
Forum: Traditional Aircraft Engines 10-24-2020, 04:09 PM
Replies: 23
Views: 2,433
Posted By rocketbob
rocketbob@gmail.com

rocketbob@gmail.com
Forum: Traditional Aircraft Engines 10-24-2020, 03:59 PM
Replies: 23
Views: 2,433
Posted By rocketbob
No its glazed. The coffee color on the sides is...

No its glazed. The coffee color on the sides is glazed oil. The center "black" is where the piston scuffed the cylinder wall.
Forum: Traditional Aircraft Engines 10-23-2020, 01:54 PM
Replies: 23
Views: 2,433
Posted By rocketbob
You have a very badly glazed cylinder from...

You have a very badly glazed cylinder from getting it too hot. The "black" part is normal but I dont see crosshatch. The only reasonable fix is remove cylinder, hone, new rings. Don't let it get...
Forum: RV General Discussion/News 10-23-2020, 08:21 AM
Replies: 11
Views: 1,498
Posted By rocketbob
I've flown with the latest Crow plastic camlocks...

I've flown with the latest Crow plastic camlocks and thought they worked nicely. I called them and asked if I could get just the camlock and they said no you have to get new belts. Which I didn't...
Forum: RV General Discussion/News 10-22-2020, 09:53 PM
Replies: 11
Views: 1,498
Posted By rocketbob
I opened the buckles, removed the springs, cut...

I opened the buckles, removed the springs, cut them down, and put everything back together. This greatly reduced the effort to insert the belts. They work very nicely now.
Forum: RV Building Tips/Techniques 10-19-2020, 11:02 AM
Replies: 11
Views: 1,169
Posted By rocketbob
You actually need to go fast on aluminum, not...

You actually need to go fast on aluminum, not slow.
Forum: Autopilots 10-16-2020, 06:16 AM
Replies: 19
Views: 2,946
Posted By rocketbob
I'll take it.

I'll take it.
Forum: Fuel Injection Systems 10-12-2020, 12:29 PM
Replies: 7
Views: 588
Posted By rocketbob
My experience is with the Rotec. Rotec is...

My experience is with the Rotec. Rotec is bascially a copy of the Ellison so it has the same problems the Ellison does at wide open throttle (too rich.). There are too many holes at the rich end so...
Forum: RV-7/7A 10-10-2020, 05:24 PM
Replies: 14
Views: 1,593
Posted By rocketbob
I'm curious if clamping an aluminum bar instead...

I'm curious if clamping an aluminum bar instead of a carbon layup would have the same effect.
Forum: RV General Discussion/News 10-09-2020, 11:41 AM
Replies: 15
Views: 2,673
Posted By rocketbob
Friend of mine in FL is a DME. A few months ago...

Friend of mine in FL is a DME. A few months ago he had a part 147 applicant in for the practical and tasked him with installing a cylinder on a case with no cylinders. They don't work well when...
Forum: Fuel Injection Systems 10-01-2020, 07:25 PM
Replies: 29
Views: 3,636
Posted By rocketbob
Flow straightener I made for a Rotec TBI. Works...

Flow straightener I made for a Rotec TBI. Works perfectly.
Forum: RV Ongoing Maintenance Issues 10-01-2020, 09:20 AM
Replies: 7
Views: 814
Posted By rocketbob
Push fitting leaks

Over the last several years I've been using push lock fittings for pitot/static connections. On a few occasions I've had these fittings leak and last night I examined a leaky tube and fitting...
Forum: RV-10 09-18-2020, 07:00 AM
Replies: 42
Views: 12,424
Posted By rocketbob
I bought it in Feb. of this year. 250 restore is...

I bought it in Feb. of this year. 250 restore is a back burner project.
Forum: RV-10 09-17-2020, 01:27 PM
Replies: 42
Views: 12,424
Posted By rocketbob
Love my 260B. I've managed to haul an 8ft long...

Love my 260B. I've managed to haul an 8ft long box inside. Mine has most available speed mods and will do 160kts running LOP 11.7GPH.
Forum: GPS 09-16-2020, 09:46 AM
Replies: 11
Views: 943
Posted By rocketbob
I have installed Aera 660's and they are nice and...

I have installed Aera 660's and they are nice and fast and touchscreen. But they do the same thing as the 496. I have a 496 in most of my airplanes and they will stay put because they just work.
Forum: Electronic Ignition Systems 09-10-2020, 08:42 PM
Replies: 25
Views: 1,865
Posted By rocketbob
Sounds like you have a bad coil pack, or bad...

Sounds like you have a bad coil pack, or bad connection to the coil pack running 1&2.
Forum: RV General Discussion/News 09-03-2020, 10:57 AM
Replies: 13
Views: 1,927
Posted By rocketbob
I have done some experiments with foam filled...

I have done some experiments with foam filled tailwheel tires. The problem with them is they flatspot when the airplane sits for a period of time.
Forum: RV-7/7A 09-02-2020, 03:07 PM
Replies: 14
Views: 2,509
Posted By rocketbob
This is quite interesting. It might be worth...

This is quite interesting. It might be worth trying something like an an aluminum bar.
Forum: RV-10 09-02-2020, 11:40 AM
Replies: 23
Views: 2,096
Posted By rocketbob
Can you hear this whine in the airplane? In my...

Can you hear this whine in the airplane? In my Comanche with the same engine its quiet and smooth.
Forum: Electrical Systems 08-29-2020, 10:37 PM
Replies: 42
Views: 4,742
Posted By rocketbob
Week ago a neighbor asked me to help him diagnose...

Week ago a neighbor asked me to help him diagnose an electrical problem on his Starduster. He heard a loud pop while cranking and as it turned out, one of the battery cells shorted. They do fail...
Forum: Aircraft Camping 08-28-2020, 04:12 PM
Replies: 23
Views: 2,066
Posted By rocketbob
Wingtips can be easily modified with a door and a...

Wingtips can be easily modified with a door and a storage locker for containing things like this.
Forum: Traditional Aircraft Engines 08-27-2020, 08:45 AM
Replies: 2
Views: 622
Posted By rocketbob
VA-151-2 alternator bracket?

I've used these brackets for a number of alternator installs and they work great. As I recall I purchased them from Van's and I believe they are PN VA-151-2. Could someone please confirm?
Forum: Flight Testing 08-26-2020, 01:04 PM
Replies: 27
Views: 2,799
Posted By rocketbob
Good info here on mixing powders into engine oil...

Good info here on mixing powders into engine oil to visualize flow:

http://hdneubert.com/Reno_Presentation.pdf
Forum: Traditional Aircraft Engines 08-26-2020, 07:57 AM
Replies: 45
Views: 4,039
Posted By rocketbob
Do you have a part# and what's distance from the...

Do you have a part# and what's distance from the cylinder?
Forum: Interiors 08-26-2020, 06:07 AM
Replies: 22
Views: 2,055
Posted By rocketbob
A few months ago I signed off an interior install...

A few months ago I signed off an interior install in a Cherokee that was custom made with Ultraleather and I was highly impressed with the material. Super nice stuff.
Forum: Traditional Aircraft Engines 08-24-2020, 03:15 PM
Replies: 36
Views: 4,203
Posted By rocketbob
The rotator cap is used on sodium-filled exhaust...

The rotator cap is used on sodium-filled exhaust valves. I believe the reason is the weld that closes off the sodium chamber is not hard and would quickly wear without it. The rotator caps are...
Forum: Traditional Aircraft Engines 08-24-2020, 01:38 PM
Replies: 36
Views: 4,203
Posted By rocketbob
The roller rockers I made are simply offset a...

The roller rockers I made are simply offset a slight amount, just as are stock rockers. There is just enough sideloading to cause the valve, springs, keepers, and the spring seats to rotate. That...
Forum: Traditional Aircraft Engines 08-24-2020, 11:06 AM
Replies: 36
Views: 4,203
Posted By rocketbob
Not if they are made correctly. I have had...

Not if they are made correctly. I have had rocker arms custom made and offset the valve stem slightly. As long as the pushing force is off to one side they will rotate.
Forum: Traditional Aircraft Engines 08-23-2020, 08:46 PM
Replies: 36
Views: 4,203
Posted By rocketbob
Intake valves not rotating suggest tight guides...

Intake valves not rotating suggest tight guides and/or rocker geometry not spinning valve.
Forum: Traditional Aircraft Engines 08-23-2020, 07:49 AM
Replies: 45
Views: 4,039
Posted By rocketbob
I thought these things lived longer if they were...

I thought these things lived longer if they were kept out of the exhaust flow thru the pipe if the welded bung was tall enough...?
Forum: Tools 08-22-2020, 05:00 PM
Replies: 8
Views: 1,202
Posted By rocketbob
The hydraulic crimper Harbor Freight sells works...

The hydraulic crimper Harbor Freight sells works well if you do come cleanup on the edges of the dies first.
Forum: RV-4 08-21-2020, 01:51 PM
Replies: 11
Views: 1,742
Posted By rocketbob
I've had very good experience with Nylaflow brake...

I've had very good experience with Nylaflow brake lines and know of a few airplanes that have had them 20+ years. They can be protected from radiant heat with a little bit of firesleeve. Ferrules...
Forum: Autopilots 08-21-2020, 08:17 AM
Replies: 36
Views: 4,950
Posted By rocketbob
In my opinion getting a GRT Mini X and adding...

In my opinion getting a GRT Mini X and adding servos to it is a very good value.
Forum: Traditional Aircraft Engines 08-18-2020, 11:00 AM
Replies: 11
Views: 1,596
Posted By rocketbob
That is exactly what I think is happening. Clean...

That is exactly what I think is happening. Clean oil = no valve guide deposits.

Think about how arbitrary a 25 or even a 50 hour number is, or even a calendar number. Makes no sense.

When the...
Forum: Traditional Aircraft Engines 08-18-2020, 10:11 AM
Replies: 11
Views: 1,596
Posted By rocketbob
I have disagreed with many things Mike Busch has...

I have disagreed with many things Mike Busch has written but his position on sticky valves take the cake. I have unstuck many valves on hot-running engines (that right there doesn't fit his...
Forum: Electrical Systems 08-12-2020, 12:49 PM
Replies: 42
Views: 2,632
Posted By rocketbob
1. What kind of antenna? 2. Why is it isolated?...

1. What kind of antenna?
2. Why is it isolated? The base needs to be connected to the ground plane.

FWIW two weeks ago I did a flight review with a gent in an old Bonanza. Both radios had static...
Forum: RV General Discussion/News 08-09-2020, 06:11 AM
Replies: 45
Views: 10,420
Posted By rocketbob
Doh! Thats correct.

Doh! Thats correct.
Forum: RV General Discussion/News 08-08-2020, 05:24 AM
Replies: 45
Views: 10,420
Posted By rocketbob
I don't know where the difference in numbering...

I don't know where the difference in numbering came from but there are a few airplanes that use this tire, not just of European origin. C172RG and C182RG on the mains.
Forum: Interiors 08-04-2020, 08:03 AM
Replies: 12
Views: 1,696
Posted By rocketbob
Leather glued to .028" Kydex with 3M 3857. ...

Leather glued to .028" Kydex with 3M 3857. Panels are attached with velcro. Worked out nicely. The corrugated plastic will show lines unless you have a thin layer of foam in-between the fabric or...
Forum: RV General Discussion/News 08-03-2020, 08:33 AM
Replies: 26
Views: 5,338
Posted By rocketbob
The other screw appears if an attempt was made to...

The other screw appears if an attempt was made to open the lid. Definitely not NIB.
Forum: RV General Discussion/News 08-01-2020, 02:18 PM
Replies: 11
Views: 1,891
Posted By rocketbob
1m is adequate. There is another version of...

1m is adequate.

There is another version of this cable with TPU insulation: https://www.digikey.com/product-detail/en/tensility-international-corp/30-00490/T1318-1-ND/5819502

Don't know if its...
Forum: RV General Discussion/News 07-31-2020, 09:48 PM
Replies: 11
Views: 1,891
Posted By rocketbob
Just this week I used wire from Digikey to fix...

Just this week I used wire from Digikey to fix one of my Halo's. T1244-1-ND Comes in 1m lengths.
Forum: Electrical Systems 07-30-2020, 02:41 PM
Replies: 42
Views: 4,742
Posted By rocketbob
One can debate the merits of battery and...

One can debate the merits of battery and alternator schemes till the cows come home but the one that will get you home from lands faraway where repairs can be done without interrupting a trip and...
Forum: Autopilots 07-28-2020, 05:48 AM
Replies: 9
Views: 1,183
Posted By rocketbob
Yes it has an autopilot. More advanced features...

Yes it has an autopilot. More advanced features come with the AP version.
Forum: Autopilots 07-27-2020, 06:15 PM
Replies: 9
Views: 1,183
Posted By rocketbob
Lot of bang for the buck with a GRT Mini-X. UI...

Lot of bang for the buck with a GRT Mini-X. UI not as polished as the G5 but synthetic vision, flight director, a map option, autopilot, and free database updates sealed the deal for me. Slightly...
Forum: Safety 07-27-2020, 07:03 AM
Replies: 46
Views: 8,652
Posted By rocketbob
Were there any attempts, before or after, to sump...

Were there any attempts, before or after, to sump the fuel tanks?
Forum: RV Ongoing Maintenance Issues 07-15-2020, 06:02 AM
Replies: 25
Views: 6,525
Posted By rocketbob
A better choice would be to lay up a layer of...

A better choice would be to lay up a layer of Kevlar on the bottom.
Forum: RV General Discussion/News 07-11-2020, 07:31 AM
Replies: 36
Views: 6,105
Posted By rocketbob
FWIW I have two good friends that are/were DMEs. ...

FWIW I have two good friends that are/were DMEs. Both have had attempts by FAA FSDO "investigators" probing them in various ways to see if either would pass applicants by paying extra.
Forum: RV Ongoing Maintenance Issues 07-09-2020, 10:22 AM
Replies: 12
Views: 1,841
Posted By rocketbob
Sounds like your idle mixture is correct. I...

Sounds like your idle mixture is correct. I would just lean it manually for now and maybe revisit in the winter especially considering hot density altitude conditions currently.
Forum: RV Ongoing Maintenance Issues 07-09-2020, 09:59 AM
Replies: 12
Views: 1,841
Posted By rocketbob
Is the vacuum line to the Lightspeed clear and...

Is the vacuum line to the Lightspeed clear and attached properly?

Is idle mixture adjusted for 50 rpm rise at idle-cutoff?

How many GPH do you show on takeoff?
Forum: RV-6/6A 07-09-2020, 09:07 AM
Replies: 18
Views: 3,616
Posted By rocketbob
Friend of mine bought one of his Lycoming models...

Friend of mine bought one of his Lycoming models and found the parts to be very accurate. Caveat is that they are not native solidworks assemblies and don't consist of indvidual .sldprt files in an...
Forum: Traditional Aircraft Engines 07-08-2020, 10:05 PM
Replies: 18
Views: 2,673
Posted By rocketbob
Unrectified AC from an alternator with a bad...

Unrectified AC from an alternator with a bad diode can cause weird things to happen. I think you should be looking at your alternator.
Forum: RV Ongoing Maintenance Issues 06-30-2020, 12:13 PM
Replies: 5
Views: 2,328
Posted By rocketbob
Sometimes a drop or two of oil on the shaft takes...

Sometimes a drop or two of oil on the shaft takes care of a sticky fuel selector.
Forum: Rocket 06-30-2020, 10:10 AM
Replies: 20
Views: 2,551
Posted By rocketbob
Perhaps. My point is there are several...

Perhaps.

My point is there are several chokepoints downstream of the servo.

In this case Jim and I picked the largest cone filter we could find that would work dimensionally in the confines of the...
Forum: Rocket 06-30-2020, 08:47 AM
Replies: 20
Views: 2,551
Posted By rocketbob
I don't see the point of hand wringing over a 3"...

I don't see the point of hand wringing over a 3" inlet when you have intake runners that have a 1.75" ID after the airflow makes two 90 degree bends from the servo thru the sump.
Forum: Glass Cockpit 06-15-2020, 01:13 PM
Replies: 20
Views: 2,474
Posted By rocketbob
FlyQ works fine on older hardware. This is...

FlyQ works fine on older hardware. This is precisely the reason why I quit using ForeFlight a few years back. Haven't missed it one bit.
Forum: RV Ongoing Maintenance Issues 06-11-2020, 02:31 PM
Replies: 11
Views: 1,748
Posted By rocketbob
I just finished doing some welding and...

I just finished doing some welding and fabrication on an old Schweiss bifold door that needed repair. The cables had eaten into the steel rotating tubes such that one of the cables had worn into the...
Forum: RV Ongoing Maintenance Issues 06-10-2020, 03:57 PM
Replies: 11
Views: 1,748
Posted By rocketbob
I'd make it out of steel. Lathe turn 8620 and...

I'd make it out of steel. Lathe turn 8620 and heat treat for abrasion resistance.
Forum: Propellers 06-08-2020, 09:59 PM
Replies: 30
Views: 3,500
Posted By rocketbob
180hp RV-4 with the Whirlwind 200RV is a really...

180hp RV-4 with the Whirlwind 200RV is a really fun combination. I would say worth the effort.
Forum: RV-8/8A 06-03-2020, 08:31 AM
Replies: 38
Views: 3,712
Posted By rocketbob
I just repainted the nosewheel on my 150. ...

I just repainted the nosewheel on my 150. Looking at it I noticed a flaw in the wheel. Look at the wall thickness around the wheel...
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