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Search: Posts Made By: Toobuilder
Forum: RV-8/8A Yesterday, 03:47 PM
Replies: 15
Views: 1,726
Posted By Toobuilder
How are these different from the Grove?

How are these different from the Grove?
Forum: Traditional Aircraft Engines 06-19-2018, 08:47 AM
Replies: 19
Views: 1,626
Posted By Toobuilder
Not tested, but since the heads are designed to...

Not tested, but since the heads are designed to work when siamesed together, the exhaust side of #3 provides the air duct to feed the lower fins of #1 and #3. It stands to reason that the exhaust...
Forum: RV-10 06-14-2018, 09:10 AM
Replies: 5
Views: 353
Posted By Toobuilder
Just as a point of reference from another thread...

Just as a point of reference from another thread of mine:

... if we take the typical 3.25 overdrive ratio of the large Lycoming pulley (9.75/3.0), we see we are spinning the alternator at almost...
Forum: Fuel Injection Systems 06-14-2018, 09:02 AM
Replies: 43
Views: 4,254
Posted By Toobuilder
Copy all. If you don't mind doing an experiment,...

Copy all. If you don't mind doing an experiment, try installing the O ring on the inner retainer first, then set it aside. Install the two bolts to hang the tube (big gap), then slip the O ring...
Forum: Fuel Injection Systems 06-14-2018, 07:39 AM
Replies: 43
Views: 4,254
Posted By Toobuilder
Good photos Mike. Curious about your...

Good photos Mike. Curious about your installation process for the O ring assembly. Did you seat everything as shown in your second picture (above), and then place and install the bolts? If so,...
Forum: Fuel Injection Systems 06-11-2018, 04:01 PM
Replies: 43
Views: 4,254
Posted By Toobuilder
Maybe this...

Maybe this helps:

http://i65.tinypic.com/2s0ecrl.jpg

The crush is determined by the depth of the counterbore in the new clamp (red, in this case). Unlike the standard Lycoming part which has the...
Forum: Fuel Injection Systems 06-11-2018, 03:37 AM
Replies: 43
Views: 4,254
Posted By Toobuilder
Expanded out (tapered) at the sump end? If so,...

Expanded out (tapered) at the sump end? If so, then a cut and weld like I did would work?
Forum: Fuel Injection Systems 06-10-2018, 02:55 AM
Replies: 43
Views: 4,254
Posted By Toobuilder
Concerning the welding of the angle valve tubes-...

Concerning the welding of the angle valve tubes- mine were factory welded about an inch down from the flange. I simply cut through the weld with a band saw, replaced the clamps and re welded. With...
Forum: Fuel Injection Systems 06-01-2018, 09:58 PM
Replies: 43
Views: 4,254
Posted By Toobuilder
After trying several different gaskets including...

After trying several different gaskets including paper, composition, silicone and even dead soft copper, I threw a rough O ring idea at Ross and sure enough, he took it and improved it. Some...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-31-2018, 08:46 AM
Replies: 1
Views: 420
Posted By Toobuilder
Saw a whole bunch of brand new in the crate...

Saw a whole bunch of brand new in the crate AEIO-540's get cut up at Edwards when they finally scrapped the T-3 Firefly program. Was this one that made it "over the wall"?
Forum: Rocket 05-29-2018, 08:06 AM
Replies: 7
Views: 980
Posted By Toobuilder
Fabricated rudder cable guards for the baggage...

Fabricated rudder cable guards for the baggage compartment. Three bends in a strip of featherweight .016 in the shape of a inverted V: _/\_ adds remarkable stiffness to the panel and certainly isnt...
Forum: RV-10 05-27-2018, 04:43 PM
Replies: 42
Views: 2,752
Posted By Toobuilder
Some time ago I proposed a slug of lead in an...

Some time ago I proposed a slug of lead in an aluminum tube spanning the fuse sides under the stab to address the RV-8 solo CG issues. Have not implemented it yet, but the cautions for spin recovery...
Forum: Electrical Systems 05-27-2018, 01:41 PM
Replies: 256
Views: 13,104
Posted By Toobuilder
Pilot Vehicle Interface... A human factors issue...

Pilot Vehicle Interface... A human factors issue that has become its own engineering sub specialty in recent years.




But there are more than a few certified airplanes that funnel the two P leads...
Forum: RV Ongoing Maintenance Issues 05-27-2018, 10:40 AM
Replies: 9
Views: 1,136
Posted By Toobuilder
An update, though no resolution yet. Spoke to a...

An update, though no resolution yet.

Spoke to a very helpful Wayne at Phlogiston and it does look like my center section will need some attention. He does have the +1 and +2 oversize bolts required...
Forum: Electrical Systems 05-27-2018, 09:31 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
The idea that additional switches for required...

The idea that additional switches for required (redundant) components adding a benign failure mode works on paper, but ignores the much more difficult to address PVI perspective. Knowing how pilots...
Forum: RV General Discussion/News 05-27-2018, 08:17 AM
Replies: 53
Views: 9,540
Posted By Toobuilder
No. The "small tab" referenced is located right...

No. The "small tab" referenced is located right at the base of the cylinder, adjacent to the hold down nut. That needs to be bent into position (often isn't), and RTV'd shut (rarely is).

That said,...
Forum: Electrical Systems 05-26-2018, 01:49 PM
Replies: 256
Views: 13,104
Posted By Toobuilder
With all due respect, I'd rather shove bamboo...

With all due respect, I'd rather shove bamboo shoots under my fingernails.

...but the concept is simple: if the ECU is "ON", so are the pump, coils and injectors. Since all of these components are...
Forum: Electrical Systems 05-26-2018, 10:58 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
This is where I think the paradigm shift happens...

This is where I think the paradigm shift happens with EFI/EI... Aside from verifying function, there is little value in the traditional "mag check" at the EOR. All you really need to do is verify...
Forum: Electrical Systems 05-26-2018, 10:33 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
I understand and appreciate that line of...

I understand and appreciate that line of thinking, but there has to be a line drawn somewhere. Yes, that single switch CAN fail in flight, but what is the probability? Is it higher or lower than...
Forum: Electrical Systems 05-26-2018, 10:20 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
Not counting the nonessential (LOP, ECU pri/sec,...

Not counting the nonessential (LOP, ECU pri/sec, etc), I have a single switch that controls the engine:

ENGINE ON/OFF

This switch lights up the ECU package which includes the ECU and controller,...
Forum: Electrical Systems 05-26-2018, 06:57 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
Slight deviation from the topic, but I see...

Slight deviation from the topic, but I see several references made throught this thread to separate switches for the various EFI components (pumps, coils, brain, etc). I dont see the logic in this,...
Forum: Electrical Systems 05-25-2018, 08:34 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
Keep in mind that 20 amps is with 2 pumps running...

Keep in mind that 20 amps is with 2 pumps running - a non standard condition. Dump one of those pumps as you would in normal flight and you're down to 13"ish" amps.

And yes, alternator failure in...
Forum: Rocket 05-24-2018, 04:39 PM
Replies: 7
Views: 980
Posted By Toobuilder
Smokey - I also have that same extended aft...

Smokey - I also have that same extended aft compartment. One has to be really creative to stay within CG in that compartment though, so that's why the effort to make the fwd compartment more...
Forum: California 05-23-2018, 06:30 PM
Replies: 17
Views: 1,288
Posted By Toobuilder
In my experience the Assessor will simply throw a...

In my experience the Assessor will simply throw a number against the wall and see if it sticks... If you dont contest the assessment, it "stuck". Most times they will back off their number pretty...
Forum: RV General Discussion/News 05-23-2018, 11:30 AM
Replies: 35
Views: 3,035
Posted By Toobuilder
This is all well and good, but I have yet to...

This is all well and good, but I have yet to experience a low level loss of control (despite spending plenty of time in the "higher risk" camp), nor have I have an engine failure... I have had a few...
Forum: RV General Discussion/News 05-23-2018, 08:33 AM
Replies: 35
Views: 3,035
Posted By Toobuilder
...Or -8's...

...Or -8's too.

http://www.vansairforce.com/community/showthread.php?t=80614&highlight=Flat+wrap

The flat wrap is easy to form and unlike the blown bubble, keeps the material dimensions consistent.
Forum: Electrical Systems 05-23-2018, 08:22 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
I'm not sure either, but it is exactly this...

I'm not sure either, but it is exactly this uncertainty that gives me comfort in the well known Pb chemistry. I'm not at all against the newer chemistries - I think they are one of the more exciting...
Forum: Electrical Systems 05-23-2018, 07:06 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
However, the Pb battery will give up its life if...

However, the Pb battery will give up its life if you need to drain it to nothing for some critical reason. I understand that the lithium chemistry will shut off to self protect. I'd hate to be in a...
Forum: RV Ongoing Maintenance Issues 05-22-2018, 08:03 PM
Replies: 9
Views: 1,136
Posted By Toobuilder
I have not mic'd the bolt, but I can feel the...

I have not mic'd the bolt, but I can feel the discontinuity with a fingernail. This is more than through the cad... Its into the base metal. I'd expect if this was damage from installation, it...
Forum: RV Ongoing Maintenance Issues 05-22-2018, 06:43 PM
Replies: 9
Views: 1,136
Posted By Toobuilder
Yep. "Trust, but verify" is a familiar saying......

Yep. "Trust, but verify" is a familiar saying... Should have done a lot more of the later before buying this one. The good thing is that I have not found anything "unfixable" yet.
Forum: RV Ongoing Maintenance Issues 05-22-2018, 06:30 PM
Replies: 9
Views: 1,136
Posted By Toobuilder
I'm looking at titanium Hi-Lok pins now...

I'm looking at titanium Hi-Lok pins now (HL10V12-28) They are available in one and two oversizes so I should be able to clean up ALL my holes and shed a few pounds in the process. I'm considering...
Forum: RV General Discussion/News 05-21-2018, 09:44 AM
Replies: 35
Views: 3,035
Posted By Toobuilder
Even if you could stop a canopy from breaking, it...

Even if you could stop a canopy from breaking, it will still deform on impact. Considering that most RV canopies are within inches of your head, it's easy to see that you are likely to be injured or...
Forum: Electrical Systems 05-20-2018, 10:55 AM
Replies: 256
Views: 13,104
Posted By Toobuilder
These design excercises are a fine use of time,...

These design excercises are a fine use of time, but lets not forget one simple axiom: You can't add "quality" after the fact.

In this application I see a bunch of angst and concern over what...
Forum: RV General Discussion/News 05-20-2018, 08:51 AM
Replies: 32
Views: 2,909
Posted By Toobuilder
You asked for council: Fly a side by side and a...

You asked for council:

Fly a side by side and a tandem and figure our what SHE wants. Then decide how often she's going to fly with you - then buy a Rocket. They can often be found for less money...
Forum: RV Ongoing Maintenance Issues 05-19-2018, 02:32 PM
Replies: 9
Views: 1,136
Posted By Toobuilder
Exclamation Wing Center Section Bolts

One thing that has always bugged me about my Rocket is the fact that the builder used -30 length bolts in the center section instead of the correct -28 (grip length). The extra length was...
Forum: RV General Discussion/News 05-19-2018, 09:35 AM
Replies: 28
Views: 2,316
Posted By Toobuilder
Id also suggest now is the time to do any...

Id also suggest now is the time to do any bending/tweaking of the intercylinder baffles to get them close to fitting - then speed tape and RTV any remaining gaps.
Forum: Rocket 05-18-2018, 11:07 AM
Replies: 7
Views: 980
Posted By Toobuilder
Wink Its very simple: 4 switches need to be flipped...

Its very simple: 4 switches need to be flipped in a specific order which is determined by a computer generated randomizer - updated every 37 hours. The only snag is that if you get the order wrong...
Forum: Rocket 05-18-2018, 10:07 AM
Replies: 7
Views: 980
Posted By Toobuilder
Eliminated the Rear Baggage Shelf

The Rocket is a fine transportation appliance for me and my wife, but it's cramped when it comes to cargo volume. Notice I said volume, not weight. With my diminutive bride in back, I can pack just...
Forum: RV General Discussion/News 05-12-2018, 12:38 PM
Replies: 34
Views: 2,531
Posted By Toobuilder
Not quite:

Not quite:
Forum: RV General Discussion/News 05-12-2018, 08:03 AM
Replies: 34
Views: 2,531
Posted By Toobuilder
The biggest effort in a windmilling internal...

The biggest effort in a windmilling internal combustion engine is pushing a slug of air against the compression stroke - reduce that air charge by choking off the throttle and the effort goes...
Forum: RV General Discussion/News 05-11-2018, 05:31 PM
Replies: 34
Views: 2,531
Posted By Toobuilder
Never heard the WOT part, but I can only assume...

Never heard the WOT part, but I can only assume that is only after you have the prop moved to coarse and now want it to stop rotating entirely. Much easier to turn an engine that is choked for air...
Forum: RV Ongoing Maintenance Issues 05-08-2018, 09:26 AM
Replies: 15
Views: 1,876
Posted By Toobuilder
I ran a set of non resistor (BE8ES) plugs with my...

I ran a set of non resistor (BE8ES) plugs with my P-mag once and it caused all sorts of problems with the ignition itself. Several trips back to Brad trying to troubleshoot (including replacing a...
Forum: Fuel Injection Systems 05-06-2018, 01:40 PM
Replies: 24
Views: 1,738
Posted By Toobuilder
In my flow test it was "regulated" pressure (45...

In my flow test it was "regulated" pressure (45 PSI), but dumping into a bucket. The alternative is to just let the fuel travel around the fuel rail (in my particular case) and back to the tank via...
Forum: Fuel Injection Systems 05-06-2018, 11:03 AM
Replies: 24
Views: 1,738
Posted By Toobuilder
Admitedly not guided by hard engineering data, my...

Admitedly not guided by hard engineering data, my fuel system for the Rocket simply tries to follow the best design elements available within the confines of the Rocket structure. For example, the...
Forum: ADS-B 05-03-2018, 10:16 AM
Replies: 23
Views: 2,432
Posted By Toobuilder
One thing to consider is that there is a growing...

One thing to consider is that there is a growing segment of the non flying public that uses ADS-B tracking as a "hobby". This might sound like a good thing until you recognize that plenty of them...
Forum: Autopilots 05-02-2018, 05:28 PM
Replies: 21
Views: 2,794
Posted By Toobuilder
Thumbs up Many thanks for clearing that up.

Many thanks for clearing that up.
Forum: Autopilots 05-01-2018, 10:58 AM
Replies: 21
Views: 2,794
Posted By Toobuilder
Thumbs up A big "Plus 1" as well.

A big "Plus 1" as well.
Forum: Fuel Injection Systems 05-01-2018, 09:00 AM
Replies: 65
Views: 20,101
Posted By Toobuilder
The typical EFI installation will use a duplex...

The typical EFI installation will use a duplex fuel valve to return fuel back to the feeding tank or a dedicated return line back to a single tank. In this case, any heat picked up in the...
Forum: Fuel Injection Systems 04-29-2018, 10:51 PM
Replies: 10
Views: 690
Posted By Toobuilder
I have my off the shelf GM FI filter in the...

I have my off the shelf GM FI filter in the engine compartment. This is downstream of the pump just as with millions of GM cars with billions of hours collectively. I do have a pre screen to keep...
Forum: Propellers 04-29-2018, 09:46 AM
Replies: 20
Views: 2,345
Posted By Toobuilder
FWIW, I have no issue with pulling on a fixed...

FWIW, I have no issue with pulling on a fixed prop either - but thats apples/oranges to the OP.
Forum: Propellers 04-24-2018, 12:00 PM
Replies: 20
Views: 2,345
Posted By Toobuilder
I lived with it for a long time as it wasn't...

I lived with it for a long time as it wasn't hurting anything. When the spinner started to dig into the cowl during hard acro however, I knew replacement isolators were needed. That fixed all the...
Forum: Propellers 04-24-2018, 10:30 AM
Replies: 20
Views: 2,345
Posted By Toobuilder
My Hiperbipe had a pronounced "wobble" (spinner...

My Hiperbipe had a pronounced "wobble" (spinner relative to cowl) at certain RPM and ground speeds. I attributed it to a resonance between the spring gear and the durometer of the mount isolators...
Forum: Propellers 04-23-2018, 02:50 PM
Replies: 20
Views: 2,345
Posted By Toobuilder
1. Take one apart and report back. And/or 2. ...

1. Take one apart and report back.

And/or

2. I don't care... as long as you don't touch my prop.
Forum: Propellers 04-23-2018, 10:35 AM
Replies: 20
Views: 2,345
Posted By Toobuilder
If you have ever taken a Hartzel prop apart you...

If you have ever taken a Hartzel prop apart you will know why pulling on the blade (even right at the hub) is a bad idea. There are very large ball bearings which allow the blades to change pitch. ...
Forum: RV-10 04-19-2018, 09:08 AM
Replies: 8
Views: 1,265
Posted By Toobuilder
DanH had some great visuals on this but they are...

DanH had some great visuals on this but they are gone. I'll try to illustrate with words:

The Lycoming cylinder cooling fins are not symmetrical with regard to the cylinder bore. On the exhaust...
Forum: RV-10 04-19-2018, 06:54 AM
Replies: 8
Views: 1,265
Posted By Toobuilder
Keep in mind the "washer trick" only works...

Keep in mind the "washer trick" only works because it creates a path around the zero fin depth area -emulating the built in "duct" formed when a siamesed cylinder is present. #6 cylinder already has...
Forum: Electronic Ignition Systems 04-17-2018, 06:43 AM
Replies: 11
Views: 1,171
Posted By Toobuilder
Not speaking for Bill, but the intercylinder...

Not speaking for Bill, but the intercylinder baffles on my factory new 540 were horrible as well. Probably 99% of builders would run them as is, but I found mine needed a lot of bending, speed tape...
Forum: RV-10 04-16-2018, 09:01 AM
Replies: 30
Views: 4,412
Posted By Toobuilder
Indeed. The endless time on the waiting list for...

Indeed. The endless time on the waiting list for the P200 finally drove me to SDS' CPI system.

...And boy am I glad that happened!
Forum: RV-10 04-15-2018, 07:18 PM
Replies: 30
Views: 4,412
Posted By Toobuilder
Anybody have any info on the advance schedule...

Anybody have any info on the advance schedule Surefly uses? Their website is pretty light on technical details.
Forum: RV General Discussion/News 04-15-2018, 12:43 PM
Replies: 21
Views: 2,740
Posted By Toobuilder
How does the weight compare to stamped units?

How does the weight compare to stamped units?
Forum: Traditional Aircraft Engines 04-15-2018, 12:28 PM
Replies: 21
Views: 2,640
Posted By Toobuilder
That doesnt account for the significant change in...

That doesnt account for the significant change in actual power output with a simple timing change though. In my ROP/LOP example cited earlier the throttle position, RPM, EGT and FF remaned the same...
Forum: Traditional Aircraft Engines 04-15-2018, 09:38 AM
Replies: 21
Views: 2,640
Posted By Toobuilder
I use the "mission at hand" to decide how far I...

I use the "mission at hand" to decide how far I want to go LOP. If I'm in a hurry or battling a headwind for example, I'll stay much closer to peak. OTOH, if I'm really trying to stretch the leg...
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