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Search: Posts Made By: LarryT
Forum: RV Ongoing Maintenance Issues 03-21-2015, 03:05 PM
Replies: 1
Views: 874
Posted By LarryT
Elevator stiffness update

When I get a rare opportunity to work on the -6A, I have been trying to follow Walt and Scott's suggestions.

I had a sinking feeling that the elevator center bearing was not rotating, so I removed...
Forum: RV Ongoing Maintenance Issues 03-15-2015, 09:27 AM
Replies: 17
Views: 5,260
Posted By LarryT
That is the explanation I needed.

Thanks guys.

Larry Tompkins
544WB -6A
W52 Battle Ground WA
Forum: RV Ongoing Maintenance Issues 03-14-2015, 07:54 PM
Replies: 17
Views: 5,260
Posted By LarryT
reopening this thread to ask Walt A. a question

Because Walt indicated that he finds the elevator center bearing being used as a bushing about 75% of the time, I thought it could benefit many if I ask Walt publicly instead of PM.

I have removed...
Forum: RV Ongoing Maintenance Issues 03-03-2015, 09:25 PM
Replies: 17
Views: 5,260
Posted By LarryT
Walt, I looked at the drawing...

... and the drawing made it look (to me, anyway) like the center bearing had shoulders on it, as opposed to washer/spacers. I will look at the drawing and the builders manual again. I presume I am...
Forum: RV Ongoing Maintenance Issues 03-02-2015, 12:19 AM
Replies: 17
Views: 5,260
Posted By LarryT
Need help diagnosing elevator stiffness

My RV-6A is currently undergoing the annual condition inspection. therefore among other things I wanted to address the SB about elevator spar cracking.

1. It was difficult to tell if there was a...
Forum: RV General Discussion/News 02-16-2015, 11:08 AM
Replies: 8
Views: 2,383
Posted By LarryT
Automotive brakes are far superior

I am referring to pin slider automotive brakes (NOT rail slider designs like Bendix -ugh!)

The best automotive designs use square section O-rings. The o-ring groove is machined into the caliper...
Forum: RV General Discussion/News 01-10-2015, 11:22 AM
Replies: 7
Views: 1,985
Posted By LarryT
Green Bay

Last time I visited was 2009. Flew into Green Bay. Stayed at the Microtel/ $50 per night (during AirVenture week!) The shuttle bus to KOSH was two blocks from hotel. The shuttle bus goes in a...
Forum: RV General Discussion/News 11-19-2014, 11:08 AM
Replies: 20
Views: 3,694
Posted By LarryT
Rotobroach?

Check Avery catalog. I don't know how long old posts are saved, but I may have posted years ago when I drilled those holes in a QB wing. I threaded a metal rod and used a jam nut to lock the...
Forum: RV General Discussion/News 11-13-2014, 04:01 PM
Replies: 21
Views: 5,359
Posted By LarryT
H2AD w/ crank triggered ignition

What would be wrong with taking the discount on a H2AD engine and using the money to buy EFII from Robert Paisley? That set-up could care less what used to be in the plane.

Larry Tompkins
544WB...
Forum: RV-7/7A 11-03-2014, 06:11 PM
Replies: 38
Views: 9,841
Posted By LarryT
Too short for an aborted takeoff

If you were taking off on a wet day, I'm not sure you could abort a take-off without running out of distance starting from mid-field, allowing for perception-reaction time and reduced braking...
Forum: RV-7/7A 10-23-2014, 03:21 PM
Replies: 14
Views: 3,411
Posted By LarryT
Nose weight

Average of 13 submissions = 286 Lbs, + 25 lbs. Extremes are 8.7% from average - distribution is closely centered around average - not that much variation to me.

Larry Tompkins
544WB -6A
W52 Battle...
Forum: RV General Discussion/News 09-12-2014, 06:08 PM
Replies: 19
Views: 4,191
Posted By LarryT
Dear Mel...

Average annual precipitation for Dallas is published in various sources as 37.6 - 40.55 inches.

Average rainfall for Portland OR is 39.14 inches.

However, you are entitled to your opinion...
Forum: RV-6/6A 06-08-2014, 03:22 PM
Replies: 13
Views: 1,852
Posted By LarryT
Removable panel

544WB, which I purchased flying has one. I like it.

Larry Tompkins
544WB -6A
W52 Battle Ground WA
Forum: RV General Discussion/News 05-27-2014, 04:16 PM
Replies: 24
Views: 8,422
Posted By LarryT
Make the clearance

I posted about this several years ago but I am too dumb to provide you with a link to the thread.

According to Larry Vetterman, Van's made a running change to the cowl that resulted in a tight...
Forum: RV General Discussion/News 03-14-2014, 07:03 PM
Replies: 4
Views: 1,299
Posted By LarryT
Cardiologist/Electrophysiologist question

I was recently in the hospital where I had several SVT episodes.

The cardiologist claimed that it is a benign condition: it could be left untreated, treated with beta blockers or an ablation.

The...
Forum: RV-9/9A 03-02-2014, 06:50 PM
Replies: 2
Views: 1,067
Posted By LarryT
Consider the Van's heat shield

Where the clearance was closest on my -6A I added one of the small Van's heat shield, which i had modified by riveting a piece of high temp silicone (red) to the outside surface of the shield. The...
Forum: West (and Southwest) 02-13-2014, 03:38 PM
Replies: 10
Views: 2,383
Posted By LarryT
I have flown that route 2x

In general terms, I have gone Bend-Winnemucca-St. George-Phoenix.

Unless you are in a hurry, take two days. Leave early the first day and stop in St. George. Brand new airport and very nice FBO....
Forum: RV General Discussion/News 02-10-2014, 03:15 PM
Replies: 71
Views: 24,109
Posted By LarryT
Alodizing

Aren't most aircraft fasteners alodized? It has been 30 years, but hydrogen embrittlement was what the metallurgists determination was.

I am certainly open to the inputs of more informed people...
Forum: RV General Discussion/News 02-10-2014, 12:58 PM
Replies: 71
Views: 24,109
Posted By LarryT
Is the bolt plated?

Plating can result in hydrogen embrittlement. Typically taken care of with a post-plating baking at about 350 degrees F.

In a former career, the automotive brake manufacturer I worked for had this...
Forum: Traditional Aircraft Engines 01-07-2014, 07:03 PM
Replies: 15
Views: 2,991
Posted By LarryT
AeroSplat air-oil seperator w/ vacuum system

+1 Eventually you will save enough on oil to pay for it.

Larry Tompkins
544WB -6A
W52 Battle Ground, WA
Forum: RV General Discussion/News 12-20-2013, 01:01 PM
Replies: 47
Views: 13,550
Posted By LarryT
I use...

...a suction pump through the dipstick tube. No need to remove the lower cowl. Good enough for Mercedes Benz. Purchase at any boat shop or online.

Larry Tompkins
544WB -6A
W52 Battle Ground WA
Forum: RV General Discussion/News 12-20-2013, 12:59 PM
Replies: 19
Views: 3,467
Posted By LarryT
use Air Stop tubes...

...and you will only have to adjust tire pressure once/year when you have the wheel pants off anyway.

Larry Tompkins
544WB -6A
W52 Battle ground WA
Forum: RV General Discussion/News 12-03-2013, 12:45 AM
Replies: 10
Views: 2,869
Posted By LarryT
Berringer Wheels...

...appear to be 100% machined. they are 3 piece. The center is probably an extruded tube, while the wheel faces are probably machined from a round billet. The wheels are a clever design. ...
Forum: RV Ongoing Maintenance Issues 12-02-2013, 12:43 PM
Replies: 52
Views: 9,972
Posted By LarryT
Gary's photo...

...indeed shows the correct installation. Unless there is too much clearance between the piston and bore, it is unlikely that an o-ring will extrude at the system pressure we use until the brake...
Forum: RV General Discussion/News 11-23-2013, 03:39 PM
Replies: 28
Views: 11,763
Posted By LarryT
Question

Did the person who did the damage fess up? Seems like the list of potential perps ought to be pretty short.
Forum: RV General Discussion/News 11-23-2013, 03:37 PM
Replies: 15
Views: 3,033
Posted By LarryT
530 hrs...

...on my RV-6A this way. Lots of screws - keep plenty of replacements on hand. I purchased the aircraft flying, so the choice was made for me. However at 6'4" and 215 lbs. and 65 years of age, I...
Forum: RV Ongoing Maintenance Issues 10-26-2013, 01:22 PM
Replies: 52
Views: 9,972
Posted By LarryT
Here is the rest of my brake story

One sunny day about a week and a half ago, I went to my hangar intending to fly. Opened the door and there was a puddle of red 5606 under the left wheel. This was the caliper that was rebuilt at...
Forum: RV General Discussion/News 10-23-2013, 12:23 PM
Replies: 20
Views: 3,942
Posted By LarryT
Is the increase or exclusion based on actuarial risk?

...or insurance company speculation about the risk?

I ask because insurance companies are all over the map on this one. One might think that pilots take better care of themselves because they want...
Forum: RV Ongoing Maintenance Issues 10-18-2013, 04:57 PM
Replies: 12
Views: 2,742
Posted By LarryT
Thanks Vern

I am trying to obtain a known good radio to swap out.

Larry
Forum: RV Ongoing Maintenance Issues 10-18-2013, 11:08 AM
Replies: 12
Views: 2,742
Posted By LarryT
Replies to posts 5,6,& 7

#5 Vern, I think it must have an external regulator. There is plug with three spade connections that plugs into the back of the alternator. However 2 of the 3 wires and connectors have been...
Forum: RV Ongoing Maintenance Issues 10-18-2013, 11:07 AM
Replies: 12
Views: 2,742
Posted By LarryT
Replies to posts 5,6,& 7

#5 Vern, I think it must have an external regulator. There is plug with three spade connections that plugs into the back of the alternator. However 2 of the 3 wires and connectors have been...
Forum: COMM 10-17-2013, 06:30 PM
Replies: 12
Views: 2,013
Posted By LarryT
Here is an update

At Don's suggestion, post #2, I removed the alternator and had it tested. It passed all three checks including diode check. Output V = 14.8 Ripple 0.49

At Gary's suggestion, I tried the intercom...
Forum: RV Ongoing Maintenance Issues 10-17-2013, 06:23 PM
Replies: 12
Views: 2,742
Posted By LarryT
Alternator update

I took the alternator in to the Auto Parts store and they checked it out has good. Passed all three tests including diode check 14.82 V; Ripple 0.49

This testing was done to see if I had a blown...
Forum: RV Ongoing Maintenance Issues 10-16-2013, 06:36 PM
Replies: 12
Views: 2,742
Posted By LarryT
Alternator inspection - How to do

I previously posted about the unbearable noise in my intercom system. One responder suggested that I may "lost a rectifier" in the alternator.

I now have the alternator out of the aircraft. There...
Forum: RV Ongoing Maintenance Issues 10-15-2013, 12:05 PM
Replies: 52
Views: 9,972
Posted By LarryT
Thank you, Dan

I thought it was a pretty simple question. If Parker was willing to give me the answer, I wouldn't have bothered anyone on this Forum with this question at all.

FWIW, I was merely trying to rule...
Forum: RV Ongoing Maintenance Issues 10-14-2013, 06:21 PM
Replies: 52
Views: 9,972
Posted By LarryT
Response to #31

Jim would you please look in your service book t o see if you can find:

1. Caliper bore diameter. Maximum diameter allowed.

2. Caliper Piston OD. Minimum diameter allowed

3. If there is...
Forum: RV General Discussion/News 10-12-2013, 09:28 AM
Replies: 4
Views: 1,244
Posted By LarryT
Change to -7 wheel pants...

...is mandatory. It is a lot of work, but I was happy with the way the job turned out.

Larry Tompkins
544WB -6A
W52 Battle Ground WA
Forum: COMM 10-11-2013, 03:01 PM
Replies: 12
Views: 2,013
Posted By LarryT
Responses to posts

#1 Don: In flight, my voltage meter reads about 14.2. My ammeter shows a draw of -2 amps. Does this sound like a potential alternator problem? Is a rectifier the same as a diode? If memory serves...
Forum: COMM 10-11-2013, 01:45 PM
Replies: 12
Views: 2,013
Posted By LarryT
FlightCom 403 doorstop?

I am beginning to think the Flightcom 403 intercom in my plane has a highest and best functioning purpose as a doorstop.

However, Before I plunk down hard earned dollars on a PS Engineering PM500EX...
Forum: RV Ongoing Maintenance Issues 10-11-2013, 01:10 PM
Replies: 52
Views: 9,972
Posted By LarryT
Reply to #17 & 18

I intend to disassemble all 4 calipers I have this winter. Flying season is almost over here in the NW.

Dan: I think your calculation using 100 lbs. application force is conservatively high. The...
Forum: RV Ongoing Maintenance Issues 10-11-2013, 12:41 PM
Replies: 52
Views: 9,972
Posted By LarryT
Diametral clearance...

... is what we were talking about, Mel.
Forum: RV Ongoing Maintenance Issues 10-10-2013, 09:14 PM
Replies: 52
Views: 9,972
Posted By LarryT
Reply to post #14 and others

Dan: yes my airplane. I did not disassemble (that was Sterling Aviation), but yes, I examined the o-ring. It was abraded in one area, not around the entire circumference. It was not cut in...
Forum: RV General Discussion/News 10-10-2013, 10:48 AM
Replies: 30
Views: 4,979
Posted By LarryT
Question about getting photos into tablet

It's me, LarryT again. These responses have been great and I am learning a lot.

Am I correct that some of the tablets do not have convenient ways to import photos? The photos taken by...
Forum: RV Ongoing Maintenance Issues 10-10-2013, 10:32 AM
Replies: 52
Views: 9,972
Posted By LarryT
thanks for posts.

Here is some background info: 1. Caliper failed hydraulically during run-up at Buchanan Field, Concord, CA 2. Repairs by Sterling Aviation 3. O-ring was found to be partially extruded/damaged. ...
Forum: RV Ongoing Maintenance Issues 10-09-2013, 10:38 PM
Replies: 52
Views: 9,972
Posted By LarryT
Excessive clearance

What if they were out-of-spec to begin with? I measured .010" piston to bore clearance. That can't be correct for a nominal 1.5" diameter. Should be more like .003".

If they didn't wear, then...
Forum: RV General Discussion/News 10-09-2013, 07:30 PM
Replies: 30
Views: 4,979
Posted By LarryT
Looks like a great moving map,but...

... does not look like it has nexrad weather overlay capability. Is that correct?

Larry
Forum: RV General Discussion/News 10-09-2013, 04:26 PM
Replies: 30
Views: 4,979
Posted By LarryT
Help nonGeek make Mini-tablet choice

I fly strictly day VFR. For years I have been happy navigating with a spiral bound Air Charts Sectional book and a compass. Then I added a Bendix AV8OR moving map GPS, primarily in the hope that...
Forum: RV Ongoing Maintenance Issues 10-09-2013, 04:03 PM
Replies: 52
Views: 9,972
Posted By LarryT
bump on brake question

Is there really no one with any info? Do you A&Ps just slap a new o-ring in without measuring anything?

Sometimes being an engineer is a real curse.

LarryT
Forum: RV Ongoing Maintenance Issues 10-03-2013, 05:51 PM
Replies: 52
Views: 9,972
Posted By LarryT
30-9 brake question

Where can I find dimensional information to inspect a 30-9 Cleveland brake assembly?

I was unable to find any dimensional information such as wear limits etc. on the Parker Hannefin website. I...
Forum: RV-3 09-10-2013, 11:40 AM
Replies: 14
Views: 2,657
Posted By LarryT
What is the reason for repainting?

Is it gloss or color choice? If it is color choice, yellow is really hard to cover and you would be better off stripping and ignoring the following paragraphs. If it is a gloss issue, then I am...
Forum: RV General Discussion/News 09-01-2013, 07:42 PM
Replies: 10
Views: 2,115
Posted By LarryT
Thanks...

...for all your responses. Satisfied my intellectual curiosity and it will help me make an improvement that doesn't cost very much but will make flying significantly more enjoyable.

Larry
Forum: RV General Discussion/News 08-30-2013, 03:25 PM
Replies: 10
Views: 2,115
Posted By LarryT
Replies to posts 2 & 3

To #2: I plugged my old DCs (purchased in 1990, when I started taking flight lessons) that had sat on the shelf for 3 years into my daughter's side and they worked fine. I do remember having to...
Forum: RV General Discussion/News 08-30-2013, 11:58 AM
Replies: 10
Views: 2,115
Posted By LarryT
Headset jacks

Are headset jacks (phone jacks) available in various quality levels?

I ask this question because of recent experience. While I was in San Diego for about five days, I unplugged my in-ear headset,...
Forum: Trip Write-ups 08-29-2013, 07:01 PM
Replies: 3
Views: 1,553
Posted By LarryT
KTSP stop

Sorry I got there on a work day. A fellow who said he knew you gave my daughter and me a ride into town for lunch.

If my son and family stay in SD I will be your way again - I don't think it will...
Forum: Electrical Systems 08-28-2013, 12:50 PM
Replies: 2
Views: 544
Posted By LarryT
FlightCom 403 help

The performance of this intercom continues to deteriorate.

It was unusable in the ICS position on my recent trip because of background static. Could only be used in the isolate position, which...
Forum: Trip Write-ups 08-27-2013, 12:26 PM
Replies: 3
Views: 1,553
Posted By LarryT
Western States Circle Tour

I left W52 (Goheen Field, Battle Ground, WA) on 8-3-13, returning on 8-14-13. The route of flight was 1W1 (Grove Field - for fuel), WMC (Winnemucca, NV) - SGU (St. George, UT) - RYN (Tucson) - SEE...
Forum: RV General Discussion/News 08-27-2013, 11:23 AM
Replies: 20
Views: 4,571
Posted By LarryT
Shorai Battery service report request

For RocketBob and others who have switched to Shorai batteries and now have some service experience, could you please post a report re your experience?

Thanks,

Larry Tompkins
544WB -6A
W52 Battle...
Forum: RV Ongoing Maintenance Issues 08-26-2013, 03:25 PM
Replies: 1
Views: 4,499
Posted By LarryT
Brake piston to bore clearance

On my recent trip to Tucson, San Diego, Oakland and return, I lost the left brake at KCCR. The o-ring extruded. Thankfully the failure occurred during the runup and not when I was landing. I note...
Forum: RV General Discussion/News 08-02-2013, 12:16 PM
Replies: 5
Views: 1,743
Posted By LarryT
There wasn't enough room...

...on the 4-Pt. Van's set I had. I eventually went with Crow, like many others on this forum. Because I was retrofitting a -6A and the rib spacing is different than the 7/9 models, the job was a...
Forum: Propellers 07-17-2013, 01:32 PM
Replies: 44
Views: 12,598
Posted By LarryT
Catto Prop move

Has Catto Propeller completed their relocation? To what airport are they relocating?

Larry Tompkins
544WB -6A
W52 Battle Ground, WA
Forum: RV General Discussion/News 07-17-2013, 01:17 PM
Replies: 7
Views: 9,061
Posted By LarryT
Clark County WA 60mph wind load

When I submitted my plans to the Clark County WA building department, I was informed that the building would have to meet a 60 mph wind load requirement with the doors open!

When I suggested that I...
Forum: RV General Discussion/News 06-30-2013, 11:06 AM
Replies: 13
Views: 2,121
Posted By LarryT
I stink at taking photos from the plane

+ I do not have an auto pilot. I really appreciate those who are able to share their memories from the air photographically.

Larry
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