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Search: Posts Made By: keitht
Forum: RV General Discussion/News 06-17-2022, 11:27 PM
Replies: 40
Views: 6,658
Posted By keitht
I have dual HDX displays. According to Dynon tech...

I have dual HDX displays. According to Dynon tech support and the Dynon web pages the HDX will only accept Seattle Avionics map software, so I have to live with that. I also use an Ipad mini running...
Forum: RV Photo/Video URLs 06-06-2022, 10:00 AM
Replies: 8
Views: 1,146
Posted By keitht
+1 on that. Best (and safest) way to get the wife...

+1 on that. Best (and safest) way to get the wife checked out in your RV is to find an experienced instructor (with lots of RV time) to do the checkout and signoff (if the insurance requires it)....
Forum: Glass Cockpit 06-04-2022, 03:36 PM
Replies: 5
Views: 1,239
Posted By keitht
I think it depends on what you want (expect) from...

I think it depends on what you want (expect) from an AOA system. For me the display in not very usable - small, down on the instrument panel and not instantly readable. The audio is usable but not...
Forum: Glass Cockpit 06-03-2022, 04:22 PM
Replies: 5
Views: 1,239
Posted By keitht
On Speed AOA

Hi Bill,
I am building an On Speed AOA module and will be installing it soon when I do my Condition Inspection. I did the calibration procedure for the HDX system and was disappointed with the...
Forum: RV-7/7A 06-03-2022, 12:28 PM
Replies: 21
Views: 1,771
Posted By keitht
CHTs

If the blue line is power then looking at the first two spikes - one may be the mag check and the second prop cycling prior to take-off if you have a CS prop. The CHTs are all at about 400 before...
Forum: RV-7/7A 06-03-2022, 10:32 AM
Replies: 21
Views: 1,771
Posted By keitht
CHT overtemp

The chart you posted is really hard to see the individual data but it does appear to be a very serious CHT overtemp if the sensors are reporting correctly. You might want to give Mike Busch at Savvy...
Forum: RV-12/RV-12iS 05-27-2022, 11:46 AM
Replies: 26
Views: 6,315
Posted By keitht
Rotax regulators

Two models of regulator are used on Rotax 912xxx engines. The Ducati type used on the non fuel injected engines and a model manufactured by a Swiss company. I know something about the topology of the...
Forum: Electrical Systems 05-11-2022, 03:56 PM
Replies: 69
Views: 8,365
Posted By keitht
Even so - 320 grams spinning at 3000 RPM that...

Even so - 320 grams spinning at 3000 RPM that gets loose can be quite spectacular.

KT
Forum: Electrical Systems 05-11-2022, 01:57 PM
Replies: 69
Views: 8,365
Posted By keitht
A couple of questions - 1. do you plan on doing...

A couple of questions -
1. do you plan on doing any catastrophic failure testing?
2. Do you have a plan for endurance testing of a number of units for a representative lifetime - say 1000 hrs of...
Forum: Electrical Systems 05-11-2022, 01:20 PM
Replies: 69
Views: 8,365
Posted By keitht
Walt, The point about the comparison between an...

Walt,
The point about the comparison between an impulse magneto and a permanent magnet alternator is that there is a lot of energy to dissipate in both if the rotating parts suddenly stop rotating -...
Forum: Electrical Systems 05-11-2022, 11:14 AM
Replies: 69
Views: 8,365
Posted By keitht
Gear Driven Alt

Watched the videos - great job. I have the B&C 30 amp gear driven alt as a backup so can make a comparison based on what appears in the videos. Got to thinking about the decision making process I...
Forum: Electrical Systems 05-09-2022, 10:20 PM
Replies: 11
Views: 921
Posted By keitht
Grounding

So the problem can be broken down into three groups.
1. Power returns that are delivering essentially DC current used to power a component
2. Data busses and signal wire returns that are balanced or...
Forum: Electrical Systems 05-09-2022, 01:33 PM
Replies: 24
Views: 2,340
Posted By keitht
Alternators

The B&C alternators probably are Denso based automotive versions with external regulators. The big advantage is that B&C have done the work to design, build test and qualify (PMA) their regulator. If...
Forum: Safety 05-02-2022, 04:00 PM
Replies: 3
Views: 462
Posted By keitht
How to land a tailwheel aircraft

Watch the youtube video of the shuttleworth trust flying collection. Tail 2 inches off the ground or a full stall three pointer - no tail high, high speed wheely (unless it is a DC3). Shuttleworth...
Forum: Electrical Systems 04-30-2022, 08:42 PM
Replies: 8
Views: 805
Posted By keitht
I would be very surprised if it was lighter,...

I would be very surprised if it was lighter, almost certainly larger diameter and you will need to protect all wires pulled through it from shorting out to it. Twisted pairs and shielded two or three...
Forum: Electrical Systems 04-24-2022, 07:41 PM
Replies: 13
Views: 1,106
Posted By keitht
Manual versus automatic switching

I am sure there are a number of configuration that would allow transfer of fuel management from one ECU to the other - from simple manual switching to more complex automatic control. Simple control...
Forum: Electrical Systems 04-24-2022, 09:28 AM
Replies: 13
Views: 1,106
Posted By keitht
Scott, The key to good systems engineering is to...

Scott,
The key to good systems engineering is to really understand the mission, know the level of human intervention needed to change the configuration in the event of a component failure, the level...
Forum: RV General Discussion/News 04-22-2022, 10:31 AM
Replies: 35
Views: 3,217
Posted By keitht
The proximity and connections to the “high...

The proximity and connections to the “high current” part of the antenna is only important for high power transmitting antenna. Not an issue for receiving only antenna. VSWR and beam pattern across...
Forum: RV General Discussion/News 04-20-2022, 09:22 PM
Replies: 40
Views: 6,658
Posted By keitht
I bought a lifetime subscription to FlyQ for use...

I bought a lifetime subscription to FlyQ for use on an Ipad mini and have a subscription to FlyQ for Dynon HDX in my Rv-7A. The Ipad mini still hangs up, goes into strange modes and is generally...
Forum: Electrical Systems 04-20-2022, 11:37 AM
Replies: 12
Views: 647
Posted By keitht
The protection components you insert into your...

The protection components you insert into your electrical power generation and distribution are there to prevent flames and smoke resulting from a fault condition in the circuit. Typically those...
Forum: Electrical Systems 04-19-2022, 11:28 PM
Replies: 12
Views: 647
Posted By keitht
Wire sizing

I think the problem is trying to figure out the physical interconnections and sizing from an electrical symbolic wiring diagram that just shows the point to point connections while trying to ensure...
Forum: Electrical Systems 04-16-2022, 02:25 PM
Replies: 7
Views: 647
Posted By keitht
The CB should be sized to protect the motor and...

The CB should be sized to protect the motor and the wiring. The wiring should be sized for voltage drop at the nominal (non charging) output voltage at the max flap lowering airspeed (motor load)...
Forum: Electrical Systems 04-15-2022, 10:13 AM
Replies: 5
Views: 1,132
Posted By keitht
The suppression diode need to be able to dump the...

The suppression diode need to be able to dump the energy stored in the coil so the characteristics of the solenoid and the suppression diode need to be matched.
The master solenoid typically has...
Forum: Electrical Systems 04-14-2022, 10:38 AM
Replies: 9
Views: 1,760
Posted By keitht
Yep - sprinkle with fairy dust and smoke...

Yep - sprinkle with fairy dust and smoke retardant and call it done. I found putting “production break” connectors between the panel wiring and the fuselage wiring made it easier to do a two stage...
Forum: RV General Discussion/News 04-12-2022, 09:03 PM
Replies: 35
Views: 3,217
Posted By keitht
Bob, I am trying to keep it simple but your...

Bob,
I am trying to keep it simple but your understanding of the way the ILS works is either not correct or I am missing something. So lets get to the engineering level for an in depth...
Forum: RV General Discussion/News 04-12-2022, 06:33 PM
Replies: 35
Views: 3,217
Posted By keitht
Its all that some of us know how to do!!

Its all that some of us know how to do!!
Forum: RV General Discussion/News 04-12-2022, 06:28 PM
Replies: 35
Views: 3,217
Posted By keitht
Reply to Bob Turner

Bob, i didn’t make my point very clearly. My comment about signal strength and boresight errors falls into two areas. VSWR - where low VSWR across the band is important and the direction of maximum...
Forum: RV General Discussion/News 04-12-2022, 05:13 PM
Replies: 35
Views: 3,217
Posted By keitht
Just so we are on the same page about ILS systems...

Just so we are on the same page about ILS systems and aircraft antenna lets just confirm some fundamentals before getting into the details.
The airport localizer transmits in the VHF band with a...
Forum: RV General Discussion/News 04-12-2022, 01:34 PM
Replies: 35
Views: 3,217
Posted By keitht
The archer antenna is perfectly good enough to...

The archer antenna is perfectly good enough to provide reliable VOR signal and guidance for en - route situations but does it provide adequate ILS localizer and glideslope reception? The Archer...
Forum: RV-7/7A 04-12-2022, 11:24 AM
Replies: 30
Views: 10,751
Posted By keitht
I installed a IO-360B1B from Aerosport power in...

I installed a IO-360B1B from Aerosport power in my RV-7A with a Hartzell CS prop. I modified the snorkel and airbox to make the snorkel removable and used the top part of a wet suit bootee to make...
Forum: RV-7/7A 04-11-2022, 08:07 PM
Replies: 1
Views: 413
Posted By keitht
Give Vans a call with the kit number, original...

Give Vans a call with the kit number, original purchaser and they should be able to tell you the kit ship dates. You will need to coodinate all that information with Vans (including your bill of sale...
Forum: Safety 03-29-2022, 07:16 AM
Replies: 26
Views: 3,443
Posted By keitht
Total Energy

Vac,
Thinking about the calibration problem and getting a reliable low noise signal for Beta dot I wondered if any thought had been given to using a probe from the top of the vertical stabilizer to...
Forum: Safety 03-28-2022, 11:17 AM
Replies: 20
Views: 1,922
Posted By keitht
Shades of Grey (and other colors for the colorblind)

Some of the preceding discussion reminds me of a well known talking head aviation expert here in the Pacific Northwest that arrived at my local airport in a Mooney 231 on a cold wet winters day,...
Forum: Safety 03-25-2022, 11:32 AM
Replies: 20
Views: 4,066
Posted By keitht
Evolution regulator

Hi Bill,
Did you make any selection to put the regulator into a standard 20 pules per minute or just leave it in auto detect mode. The data sheet notes that vibration from a vehicle can disrupt the...
Forum: RV-7/7A 02-15-2022, 11:05 AM
Replies: 10
Views: 1,106
Posted By keitht
The preformed part from the vans store are the...

The preformed part from the vans store are the parts that needs to be trimmed and drilled. Should be left and right handed parts.

KT
Forum: RV-7/7A 02-15-2022, 06:33 AM
Replies: 10
Views: 1,106
Posted By keitht
Nose gear Bracket

Look at the instructions for finishing the Vans supplied brackets. The slot has to be enlarged and shaped to fit the front wheel assembly. The drawing shows how it fits - the build instructions tell...
Forum: Interiors 01-27-2022, 12:49 PM
Replies: 37
Views: 10,938
Posted By keitht
Kydex

Yes, I used 0.028 kydex for the side panels. I did add a strip of 0.032 T3 across the top and bottom of the pockets to provide more stiffness across the pocket area. I replaced the furniture...
Forum: RV-7/7A 01-25-2022, 12:06 AM
Replies: 28
Views: 3,467
Posted By keitht
Things to do in preparation

I spent almost a year looking for a part built kit to buy. While waiting I built a 6 ft roll around bench with 3 drawers for tools on each side, an 8ft long bench for wing assembly, purchased a lot...
Forum: Interiors 01-11-2022, 08:32 PM
Replies: 37
Views: 10,938
Posted By keitht
Lemke Interior

I have make a couple of flights of 2 hours plus with my RV-7A Lemke Interior. Seats are really comfortable and the pump up lumbar support works well. I have made some changes to the interior side...
Forum: RV-7/7A 01-11-2022, 08:04 PM
Replies: 6
Views: 1,135
Posted By keitht
Oil Door

Larry,
I ran into the same issue. My solution was to make a template of the cutout in the cowling before making the cut and leaving sufficient room in each lower corner to put skybolt fasteners while...
Forum: RV-7/7A 12-15-2021, 05:12 PM
Replies: 19
Views: 2,733
Posted By keitht
Carl, Thanks for the reply. I was thinking I...

Carl,
Thanks for the reply. I was thinking I should have gone for under the tailplane location - existing wiring may be long enough, but not a problem to splice some in. Almost completed the phase...
Forum: RV-7/7A 12-15-2021, 11:02 AM
Replies: 19
Views: 2,733
Posted By keitht
Location of OAT sensors

Any suggestion on locations for Outside Air Temp probes. Put mine on the bottom skin off to the left side back about mid fuselage but am getting quite an error due to exhaust and cooling air flowing...
Forum: RV-7/7A 12-15-2021, 10:52 AM
Replies: 8
Views: 1,774
Posted By keitht
Balancing the elevator

The electric trim adds some weight to the elevator due to the trim motor so adding provision for mass balance lead sheet plates on the inside of the elevator horn will make the balancing task much...
Forum: RV General Discussion/News 12-12-2021, 01:02 PM
Replies: 29
Views: 4,246
Posted By keitht
Thread drift

There seems to be a number of threads recently that get off on a kick about extreme corner conditions or situations that are beyond reasonable or prudent. This is one of them. Who in their right mind...
Forum: RV-7/7A 12-06-2021, 09:04 PM
Replies: 36
Views: 5,200
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, 06:28 PM
Replies: 23
Views: 4,130
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, 12:07 PM
Replies: 32
Views: 4,828
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 11-27-2021, 11:19 PM
Replies: 2,023
Views: 1,512,053
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, 06:34 PM
Replies: 10
Views: 2,282
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, 10:45 AM
Replies: 3
Views: 833
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, 07:38 PM
Replies: 24
Views: 8,029
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, 05:25 PM
Replies: 31
Views: 6,306
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, 04:42 AM
Replies: 24
Views: 8,029
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, 10:15 PM
Replies: 74
Views: 22,922
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, 10:01 AM
Replies: 4
Views: 1,023
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, 11:38 AM
Replies: 28
Views: 5,524
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, 06:34 PM
Replies: 185
Views: 30,117
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, 06:50 PM
Replies: 185
Views: 30,117
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, 04:51 PM
Replies: 185
Views: 30,117
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 08-14-2021, 11:46 PM
Replies: 185
Views: 30,117
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 08-13-2021, 11:12 PM
Replies: 185
Views: 30,117
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, 11:00 AM
Replies: 185
Views: 30,117
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, 04:31 AM
Replies: 185
Views: 30,117
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 08-12-2021, 11:34 PM
Replies: 185
Views: 30,117
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...
Showing results 1 to 64 of 208

 
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