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Search: Posts Made By: keitht
Forum: RV-7/7A 12-06-2021, 10:04 PM
Replies: 26
Views: 903
Posted By keitht
+1 on location of the autopilot control panel....

+1 on location of the autopilot control panel. What are you doing for a second radio? (assume the gps navigator will have a radio built in) What controls will you have on the control stick? Are you...
Forum: RV Building Tips/Techniques 12-02-2021, 07:28 PM
Replies: 23
Views: 1,722
Posted By keitht
Had the same DAR do my inspection in July this...

Had the same DAR do my inspection in July this year - same very enjoyable experience. My builder log had lots of pictures ( a few with me in them at various critical stages of the build). I had...
Forum: RV-7/7A 11-28-2021, 01:07 PM
Replies: 32
Views: 2,739
Posted By keitht
Capacitive to voltage converter

Aircraft spruce has the Dynon converters in stock for sale - $50.00. I used them on my RV-7A ( first flight August 2021) and they work very reliably. Followed the calibration procedure for the HDX...
Forum: RV-7/7A 11-28-2021, 12:19 AM
Replies: 1,978
Views: 1,357,915
Posted By keitht
Changing prop pitch

Strap a length of 2x6 to one prop blade about half span on both sides of the blade at right angle to use as a lever ( strap both pieces of wood together with the prop blade in a sandwich) . Use about...
Forum: RV Building Tips/Techniques 11-26-2021, 07:34 PM
Replies: 10
Views: 1,014
Posted By keitht
Hi Dan, I would replace the rib because in the...

Hi Dan,
I would replace the rib because in the end you will end up with a better solution and feel more comfortable with the flying plane ( especially when you get in turbulence and wonder about the...
Forum: RV-7/7A 11-22-2021, 11:45 AM
Replies: 3
Views: 327
Posted By keitht
Star washer position

The order of the flat washer and star washer is not important from a locking point of view (the flat washer is providing only friction due to compression) but it is important for which part gets...
Forum: Electronic Ignition Systems 10-14-2021, 08:38 PM
Replies: 24
Views: 5,754
Posted By keitht
PMag lessons

Previously I noted that I had an intermittent RPM indication from the right PMag that seemed to settle down after about 20 hrs. Did an oil change at 20 hrs and checked the PMag timing. The original...
Forum: RV-7/7A 10-13-2021, 06:25 PM
Replies: 31
Views: 3,752
Posted By keitht
Fitting the Cowling

Yep, lots of opportunity to mess up when fitting the cowling halves. Fitting the prop spinner and backing plates to get the correct spacing and height for the top cowling is really important. I found...
Forum: Electronic Ignition Systems 09-24-2021, 05:42 AM
Replies: 24
Views: 5,754
Posted By keitht
Pmag tach output extra pulses

Running dual Pmags in my RV-7A with Aerosport power IO360 with about 22 hrs in phase 1 and 5 hrs on test stand. At about 8 hrs flight time in phase 1 started to see tach rpm on Skyview HDX flicking...
Forum: RV General Discussion/News 09-14-2021, 11:15 PM
Replies: 65
Views: 17,115
Posted By keitht
Dynon Capacitance fuel gages

The capacitance value is determined by the plate size and geometry so if you have already built the tanks you are stuck with the dry capacitance values. I did a dummy calibration (using a number of...
Forum: RV-7/7A 09-01-2021, 11:01 AM
Replies: 4
Views: 634
Posted By keitht
Canopy locking bar

Have you thought about just making one. 4130 raw materials, hacksaw, files and a competent welder - should be able to make one within the week.
KT
Forum: RV General Discussion/News 08-29-2021, 12:38 PM
Replies: 28
Views: 3,171
Posted By keitht
Project schedules

I purposely didn’t look at your schedule chart. When you are the only one doing all the work it becomes meaningless because everything is on the critical path due to resource limitations - you. You...
Forum: Electrical Systems 08-27-2021, 07:34 PM
Replies: 185
Views: 20,212
Posted By keitht
I think you are a little confused about the 787...

I think you are a little confused about the 787 hydraulic and electrical systems. There are 3 separate hydraulic systems - 2 are engine driven and the third is electrically powered ( can be powered...
Forum: Electrical Systems 08-16-2021, 07:50 PM
Replies: 185
Views: 20,212
Posted By keitht
Taking your comments a bit out of order. Lets...

Taking your comments a bit out of order. Lets consider acceptable risk.

If you fly on a commercial flight your expectation is that taking a one hour flight is not going to significantly shorten your...
Forum: Electrical Systems 08-16-2021, 05:51 PM
Replies: 185
Views: 20,212
Posted By keitht
Even if this is the only failure of all the units...

Even if this is the only failure of all the units that have shipped and they had shipped, say10,000 units then that represent a failure rate of 10E-4 per hr which is far from acceptable for the...
Forum: Electrical Systems 08-15-2021, 12:46 AM
Replies: 185
Views: 20,212
Posted By keitht
and ………….. more

Bob,
So lets cut to the chase……… I am not bashing the VPX, PPS or any other Ashtronics product just wondering why you would implement an essential bus with circuit breakers and fuses. The VPX pro...
Forum: Electrical Systems 08-14-2021, 12:12 AM
Replies: 185
Views: 20,212
Posted By keitht
Design decisions

Bob,
Writing a response in capitals is considered shouting. I am currently helping another builder wire his project which includes a VPX and the associated PCU module so I have a little familiarity...
Forum: Electrical Systems 08-13-2021, 12:00 PM
Replies: 185
Views: 20,212
Posted By keitht
No need to shout- just trying to understand the...

No need to shout- just trying to understand the compromises you considered in the design of the system you implemented. I am making an assumption you did postulate some design number for the system...
Forum: Electrical Systems 08-13-2021, 05:31 AM
Replies: 185
Views: 20,212
Posted By keitht
Not sure what international suit manufacturing...

Not sure what international suit manufacturing has to do with aeronautical systems engineering or the price of butter - but maybe those of us that spent the evening at 40,000 ft have it figured out....
Forum: Electrical Systems 08-13-2021, 12:34 AM
Replies: 185
Views: 20,212
Posted By keitht
ECB or not?

I find it hard to believe this is an optimized solution that balances electrical system availability, redundancy, reliability, weight, cost, maintainability, system reconfigurability and...
Forum: Electrical Systems 08-10-2021, 10:39 PM
Replies: 185
Views: 20,212
Posted By keitht
Consider the needs of the load

One very important consideration when runnning power to modern electronics is to remember that most units have switched mode power supplies powered from primary power producing all the secondary...
Forum: The RV Grin 08-03-2021, 10:39 PM
Replies: 8
Views: 1,738
Posted By keitht
N779KT first flight

The first flight RV Grin after getting RV-7A N779KT into the air for the first time.
KT
Forum: Interiors 07-04-2021, 10:11 PM
Replies: 13
Views: 2,342
Posted By keitht
Cockpit and baggage lighting

Here is my solution to baggage and cockpit panel lighting. Panel switch is center off, up for red cockpit light, down for baggage white lighting. Both on in picture during install checkout.
Forum: RV-7/7A 06-25-2021, 11:52 AM
Replies: 26
Views: 4,083
Posted By keitht
I think we are both entitled to our own point of...

I think we are both entitled to our own point of view. Yours seems to me to be equal to putting lipstick on a pig and then falling in love with it. Its still a pig - you guys have demonstrated your...
Forum: RV-7/7A 06-25-2021, 06:48 AM
Replies: 26
Views: 4,083
Posted By keitht
Spar bolts

Scott,
I would agree that serious freezing shouldn’t be necessary. You are missing the main point of the thread. The design of the gear leg support bracket and the serious interference with the...
Forum: RV-7/7A 06-23-2021, 11:40 AM
Replies: 26
Views: 4,083
Posted By keitht
Bill, Most of the problem for me was the gear leg...

Bill,
Most of the problem for me was the gear leg weldment interference issue - should have built a taildragger like you are doing. I made up 3 shop bolts for the smaller dia bolts that had tapered...
Forum: RV-7/7A 06-23-2021, 06:16 AM
Replies: 26
Views: 4,083
Posted By keitht
7A Wing Attach Close Tolerance Bolts

Just put the wings on for the last time with the close tolerance bolts at the airport. The top row of bolts are no problem. The bottom row of bolts are a piece of engineering nobody could be proud...
Forum: RV-7/7A 06-10-2021, 10:57 AM
Replies: 15
Views: 2,520
Posted By keitht
Tip up canopy release

Made and installed the pin retraction mechanism with one hinge pin slightly longer than the other so that one pin could be engaged first before working on centering the other. Did not install the...
Forum: RV-7/7A 06-07-2021, 11:33 AM
Replies: 17
Views: 2,669
Posted By keitht
Step gusset

Sent my steps to Russ to have gusset added before step installation on plane. I had already got most of the holes drilled but not riveted. Sent them USPS with a return label. Can’t remember the exact...
Forum: RV Ongoing Maintenance Issues 06-07-2021, 11:08 AM
Replies: 19
Views: 2,513
Posted By keitht
Choosing CG location

Agreed. When I owned an ASW19 sailplane I arranged the CG to be close to the aft limit to maximize soaring performance when I flew it. When my son flew it I made sure he had the CG closer to the...
Forum: RV General Discussion/News 06-06-2021, 05:24 PM
Replies: 41
Views: 7,101
Posted By keitht
Airbox mods

My modification to the airbox and cowling to improve the ease of installing the lower cowl without a second person and reduce the risk of cracks due to the interaction of the airbox with the cowling...
Forum: RV Ongoing Maintenance Issues 06-06-2021, 12:34 PM
Replies: 19
Views: 2,513
Posted By keitht
CG position clarification

Correct- with pilot weight and/or baggage the CG will move aft as fuel is reduced since the moments from pilots and baggage now have more influence. The point I was trying to make was that the empty...
Forum: RV Ongoing Maintenance Issues 06-05-2021, 03:07 PM
Replies: 19
Views: 2,513
Posted By keitht
CG location

Just got to the point in the build where I am about to finish balancing the surfaces after painting and get a final weight and balance empty weight and CG. While waiting I built a contour map of the...
Forum: Northwest 06-04-2021, 07:28 AM
Replies: 2
Views: 808
Posted By keitht
Storage at BVS

Russ,
2WE will go into one of those storage units with the wings removed. Build a holding rack for the wings and just remove the the wings. It is really easy to do with just two people and takes...
Forum: RV General Discussion/News 06-04-2021, 01:26 AM
Replies: 51
Views: 8,391
Posted By keitht
Judgment and experience

Getting back to the main point of this thread. The builder has the responsibility to exercise good judgment based on his/her experience and take a coarse of actions based on that experience. If that...
Forum: Safety 05-25-2021, 12:09 PM
Replies: 18
Views: 5,826
Posted By keitht
Stabilizer front spar

Having bought a RV7A kit that was almost up to the quick build stage and realizing that the stab front spar mod was not done I set about incorporating the Vans service bulletin doubler plates....
Forum: RV-7/7A 04-09-2021, 06:47 AM
Replies: 15
Views: 1,847
Posted By keitht
https://photos.smugmug.com/photos/i-7sC5Zhw/0/L/i-...

https://photos.smugmug.com/photos/i-7sC5Zhw/0/L/i-7sC5Zhw-L.jpg[/IMG]

And OMG, what's this... it can't be....a straight antenna (lower VSWR) on the bottom centered for best ground plane and clear of...
Forum: RV-7/7A 11-24-2020, 02:20 PM
Replies: 18
Views: 7,102
Posted By keitht
Sub panels

I did it the old fashioned way of keying off the instrument panel mounting holes for the original subpanel, instrument panel and instruments and then marked out the holes in the instrument panel with...
Forum: Safety 11-02-2020, 06:39 AM
Replies: 35
Views: 8,016
Posted By keitht
Vision

Recently a retired friend who was noted to have Eagle eyesight (no correction- better than 20/15) commented that he had been flying right seat with another pilot and had been having difficulty seeing...
Forum: Traditional Aircraft Engines 10-26-2020, 09:47 PM
Replies: 9
Views: 2,600
Posted By keitht
IO 360 B1B

Back in 2017 I bought a partially built RV-7A kit that had the finish kit for a vertical induction IO360 B1B engine. I gave a lot of consideration to changing the cowling to suit a horizontal...
Forum: Electrical Systems 10-15-2020, 09:50 PM
Replies: 29
Views: 6,000
Posted By keitht
Installing the Electronic Stuff

There really is a lot to learn and understand in selecting, laying out, installing, wiring and testing the electronic stuff. Each of these tasks has impact on the tasks that follow so just diving...
Forum: Glass Cockpit 10-15-2020, 12:23 PM
Replies: 37
Views: 7,793
Posted By keitht
Maybe the underlying issue is the different...

Maybe the underlying issue is the different regulatory controls in AUS, Canada and UK compared to here in the USA for the experimental category. We have a lot more freedom to do as we choose here in...
Forum: Electrical Systems 10-13-2020, 11:08 AM
Replies: 39
Views: 7,154
Posted By keitht
Smoke and Flames

Having taken a B&C regulator apart and traced out and analyzed the circuit I came to the conclusion that if it is wired and fused according to the instructions no fire or sustained smoke is likely...
Forum: RV-7/7A 10-12-2020, 11:52 AM
Replies: 13
Views: 5,072
Posted By keitht
When I got to the stage in the build to lift the...

When I got to the stage in the build to lift the fuselage up and install the gear I found that the gear legs had lost the left and right labels. Expecting that there should be some toe in I measured...
Forum: Electrical Systems 10-11-2020, 03:15 PM
Replies: 39
Views: 7,154
Posted By keitht
Regulator reliability

Would agree with both arguments. Keeping electronics out of wide range temperature cycling and high vibration environments is always a good idea. At the risk of igniting the integrated versus...
Forum: Electrical Systems 10-11-2020, 12:17 PM
Replies: 39
Views: 7,154
Posted By keitht
B&C regulators

These B&C regulators use 1970’s manufacturing technology. Perfectly good provided the regulator is kept out of a temperature cycling and vibration environment so the typical failure modes if they are...
Forum: Glass Cockpit 10-09-2020, 09:26 PM
Replies: 5
Views: 1,713
Posted By keitht
Sensor widget files

The original point of my post was to solicit information about redefining sensor files by writing text files for the HDX/EMS-220 firmware. I would like to drag the conversation back in that...
Forum: RV Building Tips/Techniques 10-09-2020, 10:55 AM
Replies: 14
Views: 3,652
Posted By keitht
Mcmaster Carr sell the mil spec adel clamps also...

Mcmaster Carr sell the mil spec adel clamps also in aluminum, steel and stainless. Pricing and deliver are excellent. Black - normal temp. White - high temp.

KT
Forum: Glass Cockpit 10-08-2020, 04:39 PM
Replies: 5
Views: 1,713
Posted By keitht
Combining alternators on one shunt

Greg, did think about that solution but had the concern that the shunt rating needed to be sized for the combined output of both alternator if both field switches got turned on together. The solution...
Forum: Glass Cockpit 10-08-2020, 09:58 AM
Replies: 5
Views: 1,713
Posted By keitht
HDX - EMS 220 custom sensor files

Have been considering a revision to my sensor mapping and creating a custom file for a second current shunt amplifier. I have a two alternator, one battery, main bus and essential bus configuration (...
Forum: RV-7/7A 10-07-2020, 04:06 PM
Replies: 6
Views: 2,337
Posted By keitht
Dielectric constant of water

Important to remember that the dielectric constant for water is 80 so it only takes a very small amount of water to cause a large swing in apparent fuel reading. Other contaminants in the fuel can...
Forum: RV Building Tips/Techniques 10-02-2020, 12:04 PM
Replies: 53
Views: 16,979
Posted By keitht
Tom, nor I. If my attempt at levity fell flat my...

Tom, nor I. If my attempt at levity fell flat my apologies. I have the greatest respect for you and your joint venture products. Having come from the large commercial and military aerospace world the...
Forum: RV Building Tips/Techniques 10-01-2020, 04:58 PM
Replies: 53
Views: 16,979
Posted By keitht
FT 60

I guess it depends on how much time you spend inverted. I would guess (but it is just a guess) that the bearing for the flow rotor is designed to take the load of the sensor (hall effect?) in the...
Forum: RV Building Tips/Techniques 10-01-2020, 11:58 AM
Replies: 53
Views: 16,979
Posted By keitht
Red Cube Mounting

I think it depends on the technology used in the flowmeter and if flow straighteners are incorporated in the design. Here is the installation instructions from Electronics International.
“Electrical...
Forum: RV Building Tips/Techniques 09-29-2020, 11:34 PM
Replies: 53
Views: 16,979
Posted By keitht
Red Cube mounting

While I can see that mounting the FT 60 to a modified fuel divider bracket in the upper spine of the engine has some merit in terms of convenience, maintainability and minimum length of hoses, I cant...
Forum: Safety 09-25-2020, 05:45 PM
Replies: 51
Views: 10,068
Posted By keitht
One more thought

Making the decision to do a 180 has to be based on what it looks like and not the altimeter reading. Work on being able to read the angles to touchdown and vertical (straight down) view without...
Forum: Safety 09-25-2020, 04:30 PM
Replies: 51
Views: 10,068
Posted By keitht
Turnback on departure

As a GFI-G having done a lot of instructing in low power motor gliders, motor glider endorsements and evaluating pilots in loss of power on takeoff procedures, I believe the following general...
Forum: RV-7/7A 08-27-2020, 11:08 AM
Replies: 33
Views: 7,806
Posted By keitht
Fast build RVs

I took a look at a 9 that had been built from quick build kits to flying in less than a year for a friend that was considering purchasing. It was probably safe but all the places in the build where...
Forum: RV-7/7A 08-26-2020, 09:14 PM
Replies: 33
Views: 7,806
Posted By keitht
Build Time

I bought a partial build that was at about the quick build stage for wings and fuselage. Spent the first six months going through every rivet and checking the plans and build. All excellent but...
Forum: RV Building Tips/Techniques 08-24-2020, 07:35 AM
Replies: 25
Views: 6,885
Posted By keitht
Yes it does. Loctite 598 in a tube - used about...

Yes it does. Loctite 598 in a tube - used about half a tube per sock. Made a clay mould and fashioned a two layer sock from 9 oz glass. Loctite 598 is horrible stuff to work with to get the glass...
Forum: Flight Testing 08-16-2020, 10:21 PM
Replies: 6
Views: 2,886
Posted By keitht
Raptor

Watched the video and a couple of others on the raptor and wasabi flight test. Very revealing!! Obviously some scar tissue from past flight testing in the Wasabi camp. But they are doing it right and...
Forum: RV Building Tips/Techniques 08-11-2020, 11:52 AM
Replies: 25
Views: 6,885
Posted By keitht
Inlet hose sock

Thanks Greg,
I had come to the conclusion that a flexible clamp (such as zip ties) is required around the ram air inlet extension to secure the sock. Now working on a solution with two layers of 3...
Forum: RV Building Tips/Techniques 08-11-2020, 12:18 AM
Replies: 25
Views: 6,885
Posted By keitht
Revisit on the airbox sock

Still trying to optimize the airbox to ram air inlet interface. Tried the Dorman inlet hose (696-083) which fit perfectly but the bellow diameter interferes with the bottom of the cowling and it is...
Forum: RV Building Tips/Techniques 08-08-2020, 10:42 PM
Replies: 10
Views: 4,134
Posted By keitht
RV-7A Cowling fitting

The Vans instructions for fitting and trimming the top and bottom cowling worked out pretty well in my case. I have a Hartzell constant speed prop and did a fitting before making the cowling cut at...
Showing results 1 to 64 of 164

 
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