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Search: Posts Made By: Toobuilder
Forum: Traditional Aircraft Engines 10-21-2018, 11:43 AM
Replies: 3
Views: 117
Posted By Toobuilder
Regardless of the accessory drive speed, the cam...

Regardless of the accessory drive speed, the cam and crank will always maintain a 2:1 relationship. Any variation in accessoriy drive ratio will build off that foundation.
Forum: RV-14 10-19-2018, 12:55 PM
Replies: 31
Views: 1,625
Posted By Toobuilder
It's not "my" spec, it is found in the data...

It's not "my" spec, it is found in the data sheets of the manufacturer. And yes, nutplates do "wear out" in use. The fasteners securing inspection panels in front of the inlets of the jet engine...
Forum: RV-14 10-19-2018, 09:16 AM
Replies: 31
Views: 1,625
Posted By Toobuilder
The above is contrary to the process...

The above is contrary to the process specifications of the large aerospace company I work for.

There are many, many varieties of self locking nutplates and many of them share the properties of, and...
Forum: RV General Discussion/News 10-15-2018, 03:31 PM
Replies: 18
Views: 1,698
Posted By Toobuilder
Rocket with 60 gallon tanks. 200KTAS @ 10GPH...

Rocket with 60 gallon tanks. 200KTAS @ 10GPH gets you there in 5 hours with ample reserves.
Forum: RV General Discussion/News 10-14-2018, 06:43 PM
Replies: 41
Views: 3,636
Posted By Toobuilder
Im not suggesting a copy of the L-39, but hanging...

Im not suggesting a copy of the L-39, but hanging a wet tip off a bunch of #8 screws countersunk into fiberglass will take some careful study.
Forum: RV General Discussion/News 10-14-2018, 10:29 AM
Replies: 41
Views: 3,636
Posted By Toobuilder
I'd take a good look at how the shear load of...

I'd take a good look at how the shear load of that new tank is addressed. The L-39 uses a similar attach method for its 26 gallon tip tanks, but the fasteners going into the upper and lower skin are...
Forum: RV General Discussion/News 10-14-2018, 10:20 AM
Replies: 41
Views: 3,636
Posted By Toobuilder
Makes sense. I think I glossed over your...

Makes sense. I think I glossed over your concerns about maintaining acro capability. Roll rate will slow with bigger tanks and spins would have to be fully explored again, but beyond that I'm...
Forum: RV General Discussion/News 10-11-2018, 07:41 AM
Replies: 41
Views: 3,636
Posted By Toobuilder
Not sure what your pro/con analysis is suggesting...

Not sure what your pro/con analysis is suggesting here. Building a larger tank a few bays towards the tip is less overall weight than "wetting" a few bays AT the tip, and certainly results in a...
Forum: RV General Discussion/News 10-10-2018, 07:22 AM
Replies: 41
Views: 3,636
Posted By Toobuilder
A other popular option from John is bigger tanks....

A other popular option from John is bigger tanks. He sells new skins for extended tanks to get you about 58 gallons total- a bit more if you reverse the end ribs. Ive looked at a variety of options...
Forum: Reviews 09-28-2018, 03:59 PM
Replies: 37
Views: 11,284
Posted By Toobuilder
If you happen to be local to Desser and have a...

If you happen to be local to Desser and have a set of worn tires around, they will recap yours pretty quickly.
Forum: RV General Discussion/News 09-28-2018, 06:50 AM
Replies: 25
Views: 2,077
Posted By Toobuilder
I didnt get the impression the OP or subsequent...

I didnt get the impression the OP or subsequent replies were discussing flying the airplane with any part of the cowl removed.
Forum: Traditional Aircraft Engines 09-27-2018, 09:11 AM
Replies: 4
Views: 329
Posted By Toobuilder
On my lyc 200 I removed the bracket and went...

On my lyc 200 I removed the bracket and went straight to the mixture arm. Never understood why Vans added all that monkey motion. Certainly wasn't needed on my configuration.
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-26-2018, 07:07 AM
Replies: 44
Views: 5,965
Posted By Toobuilder
I've never asked for a deposit before giving a...

I've never asked for a deposit before giving a flight, but Thats a pretty good idea in my mind. To me, the "test flight" is pretty close to the last step in the decision process; The airplane has...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-24-2018, 04:42 PM
Replies: 44
Views: 5,965
Posted By Toobuilder
I've sold a few airplanes and it seems that...

I've sold a few airplanes and it seems that invariably the first step in the airplane ownership process for the "Tire Kicker" is "go for a free ride", followed by "Get a job"; "Check with the wife"...
Forum: Propellers 09-14-2018, 11:31 AM
Replies: 2
Views: 401
Posted By Toobuilder
Stripped and polished my last prop on the Rocket...

Stripped and polished my last prop on the Rocket after seeing my neighbors chrome like example. Current prop is stripped and working toward final polish. Advice: DO NOT use any form of abrasive to...
Forum: Electrical Systems 09-12-2018, 11:55 PM
Replies: 14
Views: 3,906
Posted By Toobuilder
I dont dislike/question the "quality" of the...

I dont dislike/question the "quality" of the Delphi crimps - I dislike "yet another" specialized crimp tool/connector when I have a million ring terminals and the tools to properly install them in my...
Forum: RV-14 09-12-2018, 02:43 PM
Replies: 37
Views: 4,359
Posted By Toobuilder
Yep. Those bolts are 10/32 and I replaced them...

Yep. Those bolts are 10/32 and I replaced them with drilled head AN bolts and lockwired them. No issues since.
Forum: Fuel Injection Systems 09-09-2018, 09:42 AM
Replies: 104
Views: 14,807
Posted By Toobuilder
Found another benefit to these things yesterday. ...

Found another benefit to these things yesterday. I needed safety the lower baffles and one of the induction tubes was in the way. I tried several times to get a good angle on the problem and then...
Forum: RV-4 09-05-2018, 07:56 AM
Replies: 41
Views: 5,718
Posted By Toobuilder
Pretty sure the Rocket is the same style latch. ...

Pretty sure the Rocket is the same style latch. I didnt like the fact that closed was not a positive lock, so I modified mine to go over center. Same basic parts, just changed the geometry a bit.
Forum: Traditional Aircraft Engines 09-04-2018, 07:42 AM
Replies: 22
Sticky: ENGINE COOLING
Views: 3,665
Posted By Toobuilder
The simpler duct shown in post #16 of my other...

The simpler duct shown in post #16 of my other thread is now my default bypass duct. I have one on cylinder #5 on the Rocket's new baffles as well as an identical example on #2. The one on #2...
Forum: Traditional Aircraft Engines 09-03-2018, 01:56 PM
Replies: 22
Sticky: ENGINE COOLING
Views: 3,665
Posted By Toobuilder
Yes. Preaching to the choir....

Yes. Preaching to the choir.

http://www.vansairforce.com/community/showthread.php?t=93949&highlight=CHT
Forum: RV General Discussion/News 09-02-2018, 01:19 PM
Replies: 47
Views: 2,747
Posted By Toobuilder
This is not a red cube but the concept is...

This is not a red cube but the concept is similar:

http://i66.tinypic.com/2vlwbyd.jpg
Forum: RV-9/9A 09-02-2018, 09:41 AM
Replies: 3
Views: 506
Posted By Toobuilder
Many, many threads discussing the #3 issue. Do a...

Many, many threads discussing the #3 issue. Do a search and you will have several hours of reading.
Forum: RV General Discussion/News 09-02-2018, 08:15 AM
Replies: 47
Views: 2,747
Posted By Toobuilder
The raw flow divider ports should be NPT. Mine...

The raw flow divider ports should be NPT. Mine were, and I used a short male/male NPT nipple to attach the transducer to the divider. "Hard" mounting is not reccomended, but it served me just fine...
Forum: Rocket 09-01-2018, 05:46 PM
Replies: 30
Views: 4,573
Posted By Toobuilder
The lower speeds are my typical "economy" cruise...

The lower speeds are my typical "economy" cruise and ~9000 MSL. Higher numbers were SL.
Forum: Rocket 09-01-2018, 01:02 PM
Replies: 30
Views: 4,573
Posted By Toobuilder
Speed between the F-1 and HRII is based primarily...

Speed between the F-1 and HRII is based primarily on attention to the build. Again drawing from the "real world", the group of 6 Rockets that I run with (3 are F-1's and 3 are HRII's), 1 particular...
Forum: Rocket 09-01-2018, 09:29 AM
Replies: 30
Views: 4,573
Posted By Toobuilder
Data from my stable: RV-8 165 KTAS @ 8.5 GPH...

Data from my stable:

RV-8 165 KTAS @ 8.5 GPH (19.4 MPG)
Rocket 202 KTAS @ 11 GPH (18.3 MPG)

I have hundreds of hours of cross country time in both, typically loaded to the gills with PAX and...
Forum: Fuel Injection Systems 08-31-2018, 11:34 AM
Replies: 94
Views: 6,447
Posted By Toobuilder
What's the PN of the hose stock (Aeroquip 303,...

What's the PN of the hose stock (Aeroquip 303, etc) that you use?

How many examples of your direct mount injectors are flying, and what's the approximate cum hours?
Forum: Rocket 08-31-2018, 11:31 AM
Replies: 30
Views: 4,573
Posted By Toobuilder
I have both in my hangar, and "I" can hardly...

I have both in my hangar, and "I" can hardly bring myself to fly the -8 when the Rocket is airworthy... The little guy just sits in the corner.

That said, you need to sit in a Rocket to see if the...
Forum: Fuel Injection Systems 08-31-2018, 11:11 AM
Replies: 94
Views: 6,447
Posted By Toobuilder
Certainly noteworthy, but worse than "vibration"...

Certainly noteworthy, but worse than "vibration" is the amount of independent movement each head has relative to each other. We know that installing a one piece baffle spanning 2 or 3 heads will...
Forum: Fuel Injection Systems 08-28-2018, 01:17 PM
Replies: 94
Views: 6,447
Posted By Toobuilder
I appreciate that observation but in this case...

I appreciate that observation but in this case the picture isn't worth 1000 words. So here's a few more: The clamp spacing on the main rail is consistent with typical engineering guidance. The one...
Forum: Fuel Injection Systems 08-28-2018, 01:05 PM
Replies: 94
Views: 6,447
Posted By Toobuilder
In this case we are discussing the direct mount...

In this case we are discussing the direct mount bosses that thread into the primer/injector ports, not the weld in types.
Forum: RV General Discussion/News 08-28-2018, 08:47 AM
Replies: 73
Views: 6,647
Posted By Toobuilder
There is a difference between blindly dumping a...

There is a difference between blindly dumping a load of auto gas into an airplane and "seeing what happens" and designing the system to use it. As others have done, my system has zero 90 degree...
Forum: Fuel Injection Systems 08-28-2018, 08:32 AM
Replies: 94
Views: 6,447
Posted By Toobuilder
Short answer: My preference to minimize MMOI. ...

Short answer: My preference to minimize MMOI. I'm trying to minimize mass hanging off the injector body. Originally I intended to have an "in" and "out" fitting on these bodies just so I could...
Forum: RV General Discussion/News 08-27-2018, 07:29 PM
Replies: 73
Views: 6,647
Posted By Toobuilder
I have no direct experience with the 390, but...

I have no direct experience with the 390, but significant evidence suggests that 8.5 CR is not a hard limit for various grades of existing auto fuel even with fixed timing magnetos. In that case, the...
Forum: Fuel Injection Systems 08-27-2018, 02:49 PM
Replies: 94
Views: 6,447
Posted By Toobuilder
Since this has turned into a discussion about...

Since this has turned into a discussion about fuel rail design, here's what I'm doing. The rail is just a loop of .035 SS hardline with 6 bungs welded on. There is hardline from the rear baffles...
Forum: Fuel Injection Systems 08-26-2018, 12:36 PM
Replies: 104
Views: 14,807
Posted By Toobuilder
These were created to solve a known problem that...

These were created to solve a known problem that has plagued pilots and mechanics for decades. Bottom line: if your stock gaskets are not leaking yet, they will.

So yes, this is a good preventative...
Forum: Fuel Injection Systems 08-26-2018, 01:29 AM
Replies: 104
Views: 14,807
Posted By Toobuilder
Steve- the sump to tube seal is around the bore. ...

Steve- the sump to tube seal is around the bore. The tube itself is free to translate in and out a bunch (probably +- a half inch). With amount the cylinders walk around in service this connection...
Forum: Fuel Injection Systems 08-24-2018, 03:40 PM
Replies: 104
Views: 14,807
Posted By Toobuilder
Steve- having done a 200hp, AV, horizontal sump...

Steve- having done a 200hp, AV, horizontal sump as the prototype for this product, IMHO, you would have to be really sloppy in your welding to mess this up. Yes, you could drive the condition which...
Forum: Traditional Aircraft Engines 08-23-2018, 09:14 AM
Replies: 49
Views: 3,753
Posted By Toobuilder
The Lightspeed “runaway” MAP sensor is a known...

The Lightspeed “runaway” MAP sensor is a known issue thanks to this forum and was my initial thought – but that’s been put to bed during troubleshooting. Induction leaks can be insidious but should...
Forum: Traditional Aircraft Engines 08-18-2018, 07:02 PM
Replies: 9
Views: 950
Posted By Toobuilder
Something not cooling related caught my eye- it...

Something not cooling related caught my eye- it looks like the cooler is hanging off the firewall with a pair of L brackets, each attached to one ear of the cooler. If that's the case, I'd expect...
Forum: Electronic Ignition Systems 08-18-2018, 10:30 AM
Replies: 3
Views: 703
Posted By Toobuilder
I have no direct experience but I can say I've...

I have no direct experience but I can say I've been contacted by a board member who replaced his magneto with a Surefly and shortly thereafter returned the Surefly in favor of CPI. I'll leave it up...
Forum: Traditional Aircraft Engines 08-18-2018, 10:10 AM
Replies: 9
Views: 950
Posted By Toobuilder
In addition to the diameter of the duct, also...

In addition to the diameter of the duct, also consider length. That duct diameter might work at 4 inches long with no bends, but your setup is really taxing delivered airflow. Long, bends, and SCAT...
Forum: RV General Discussion/News 08-16-2018, 01:48 PM
Replies: 359
Views: 78,099
Posted By Toobuilder
Not always. My -8 does 165 KTAS @ 8.5 GPH for...

Not always. My -8 does 165 KTAS @ 8.5 GPH for 19.5 MPG. There are more than a few Rockets that can do 200 @ 10GPH for 20MPG. Though my Rocket isn't in the 200@10 range just yet, it will be. In...
Forum: RV General Discussion/News 08-16-2018, 01:28 PM
Replies: 359
Views: 78,099
Posted By Toobuilder
I have to agree that it's going to be tough to...

I have to agree that it's going to be tough to capture another market segment. There is no technical magic to the RV line, but it was the right airplane at the right time and that momentum has been...
Forum: RV General Discussion/News 08-16-2018, 12:13 PM
Replies: 359
Views: 78,099
Posted By Toobuilder
Well, just like the Bushplane market is covered,...

Well, just like the Bushplane market is covered, you can buy an L-39 today for less than a used RV-10 if you need to satisfy your "inner Maverick".

An efficient, long legged, 230 knot piston single...
Forum: RV General Discussion/News 08-16-2018, 11:58 AM
Replies: 359
Views: 78,099
Posted By Toobuilder
In a pure, technical sense - sure. But how often...

In a pure, technical sense - sure. But how often are those concepts truly optimized and then applied to kit aircraft? Not often. A brief scan of homebuilt empty weight specifications will show...
Forum: RV General Discussion/News 08-16-2018, 11:20 AM
Replies: 359
Views: 78,099
Posted By Toobuilder
Even at 250 knots (still fairly slow by aviation...

Even at 250 knots (still fairly slow by aviation standards), aluminum is a very viable construction medium. The use of composites for homebuilts is more about styling and kit manufacture than any...
Forum: RV General Discussion/News 08-16-2018, 11:15 AM
Replies: 359
Views: 78,099
Posted By Toobuilder
Hard to say. How do you define "expensive"? ...

Hard to say. How do you define "expensive"? People on other forums think RV's are "expensive"... It's a matter of perspective. Anyway, parametric estimating will show the airframe cost to scale...
Forum: RV General Discussion/News 08-16-2018, 10:59 AM
Replies: 359
Views: 78,099
Posted By Toobuilder
Idunno… Van’s has most of the market covered...

Idunno… Van’s has most of the market covered from the bugsmasher RV-12 to the School Bus RV-10. Bush aircraft are not represented, but frankly that small market is already saturated with excellent...
Forum: RV General Discussion/News 08-14-2018, 08:35 AM
Replies: 14
Views: 9,961
Posted By Toobuilder
The repaired unit has been flawless in service. ...

The repaired unit has been flawless in service. It also seems to have lost its intolerance to chargers. Any cord/charger combo I have around works fine.

No issues, no complaints.
Forum: RV-14 08-12-2018, 09:57 PM
Replies: 37
Views: 4,359
Posted By Toobuilder
One of the "secrets" to the NL starter is no...

One of the "secrets" to the NL starter is no secret at all... It has a significant mechanical advantage due to its massive gear reduction. I'm not sure any other starter bests the reduction of the
...
Forum: Fuel Injection Systems 08-12-2018, 09:47 PM
Replies: 103
Views: 20,122
Posted By Toobuilder
Mark- the standard practice of connecting a MAP...

Mark- the standard practice of connecting a MAP sensor or MP gage to a single cylinder means you get a strong but "lumpy" signal from that one piston hammering up and down. A signal from the TB...
Forum: Alternative Engines 08-12-2018, 10:40 AM
Replies: 94
Views: 14,987
Posted By Toobuilder
A buddy of mine had a "sleeper" street race 5.0...

A buddy of mine had a "sleeper" street race 5.0 Mustang a few years ago. The engine was essentially a stock 87 5.0 but he had headers and a great exhaust. The car would routinely run in the low 10...
Forum: Fuel Injection Systems 08-12-2018, 10:21 AM
Replies: 103
Views: 20,122
Posted By Toobuilder
Did you tap into the plenum or one of the...

Did you tap into the plenum or one of the runners? If the plenum, I'd expect there to be no bounce in the MAP due to the large volume and smoothing effect of the multiple cylinders. I tapped into...
Forum: Traditional Aircraft Engines 08-11-2018, 09:30 AM
Replies: 15
Views: 2,084
Posted By Toobuilder
Great- now I'm on the spot! I'd hoped to keep...

Great- now I'm on the spot!

I'd hoped to keep the plenum and some of the other radical cooling ideas secret until I'd actually flown them and could declare victory. The "transitions" seem low risk...
Forum: Rocket 08-10-2018, 03:37 PM
Replies: 5
Views: 1,044
Posted By Toobuilder
Thats pretty compelling Tom... How about adding...

Thats pretty compelling Tom... How about adding another 3" flange to the "doughnut" so the SCAT has some tube to hang onto? Good stuff!
Forum: Rocket 08-10-2018, 02:15 PM
Replies: 5
Views: 1,044
Posted By Toobuilder
Building my cooling plenum as I go. After...

Building my cooling plenum as I go. After considering some exotic layup options for the upper lid I finally said "f$&k it" and went with an ultra simple .016 aluminum flat wrap lid secured with piano...
Forum: Engine Monitors 08-10-2018, 09:35 AM
Replies: 25
Views: 3,416
Posted By Toobuilder
In some cases you are right - after all, you can...

In some cases you are right - after all, you can buy a blueray player for well under $100. BUT, we also have to give a nod to low volume. And lets not forget that this is a business proposition. ...
Forum: Engine Monitors 08-09-2018, 11:30 AM
Replies: 25
Views: 3,416
Posted By Toobuilder
Aviation is expensive, but one look at aviation...

Aviation is expensive, but one look at aviation ads from 30/40 years ago would show some shockingly expensive electronics with laughable capability. By comparison we are getting FAR more value...
Forum: Traditional Aircraft Engines 08-08-2018, 07:59 AM
Replies: 37
Views: 3,256
Posted By Toobuilder
For some of us, it's very hard to define "your...

For some of us, it's very hard to define "your altitude". My strip (2600MSL) is within 30 minutes flight time from a mountain strip thats almost 7000 MSL AND a strip thats more than 200 feet BELOW...
Forum: Traditional Aircraft Engines 08-07-2018, 08:16 PM
Replies: 37
Views: 3,256
Posted By Toobuilder
Yep, there is no reason at all to take my word...

Yep, there is no reason at all to take my word for it. But please perform a simple test and report back. Adjust your idle for the appropriate 30 RPM rise at sea level and take note of how far out...
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