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Search: Posts Made By: rv6ejguy
Forum: Alternative Engines Yesterday, 05:47 PM
Replies: 33
Views: 7,312
Posted By rv6ejguy
Really appreciate you publishing all this info....

Really appreciate you publishing all this info. Prototypes and test airframes usually accumulate some "extras" along the way. I did a similar weight reduction program some years after the build...
Forum: RV General Discussion/News 06-26-2022, 10:08 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
Mazda

Finn, looks like you've had multiple Mazda powered RVs. How has your experience with these been? Fuel burn vs. TAS, problems, engine life etc? Interested to know.
Forum: RV General Discussion/News 06-26-2022, 08:40 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
The OEM Mazda FPR is a good choice. Very...

The OEM Mazda FPR is a good choice. Very reliable. I've seen a number of problems with cheap aftermarket FPRs and feel they are a poor choice for aircraft. It's a critical component when running EFI,...
Forum: RV General Discussion/News 06-26-2022, 08:36 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
This is specifically why we don't recommend a...

This is specifically why we don't recommend a pump for each tank or submerged pumps. If it fails, you can't access fuel in that tank.
Forum: RV General Discussion/News 06-26-2022, 08:34 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
Correct and good point. TI specifically says not...

Correct and good point. TI specifically says not to use PWM on the GSL series of pumps. They do make other pumps designed to work with PWM.
Forum: RV General Discussion/News 06-26-2022, 08:32 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
JDT is a reputable source of genuine TI pumps. :)

JDT is a reputable source of genuine TI pumps. :)
Forum: RV General Discussion/News 06-25-2022, 08:08 AM
Replies: 54
Views: 8,705
Posted By rv6ejguy
BPR isn't a term I'm familiar with but if your...

BPR isn't a term I'm familiar with but if your refer to the pressure regulator (usually abbreviated FPR), it doesn't care how much flow goes through it as long as not so excessive as to exceed its...
Forum: RV General Discussion/News 06-24-2022, 08:53 PM
Replies: 54
Views: 8,705
Posted By rv6ejguy
Discharge should to be level or higher than...

Discharge should to be level or higher than inlet.

Flooded inlet is safest and gives the least chance of vapor lock with Mogas, hot day, high altitude.

If the pumps sound gravelly, they are on...
Forum: RV General Discussion/News 06-24-2022, 05:37 PM
Replies: 54
Views: 8,705
Posted By rv6ejguy
I've run a 392 for over 5000 hours in our turbo...

I've run a 392 for over 5000 hours in our turbo shop car. Never touched, still working fine and producing enough volume and pressure to feed 275hp.

I have many dozens of customers with over 500...
Forum: Alternative Engines 06-24-2022, 11:56 AM
Replies: 66
Views: 7,930
Posted By rv6ejguy
Good stuff. Kudos for putting the "E" back in...

Good stuff. Kudos for putting the "E" back in Experimental. A most interesting project.:)

We're all hoping it lasts well and could pave the way for a few more wishing for something different up...
Forum: Alternative Engines 06-23-2022, 07:10 AM
Replies: 66
Views: 7,930
Posted By rv6ejguy
I'd generally agree with Larry here on leaning...

I'd generally agree with Larry here on leaning too far with this high specific output engine. Unless it has oil jetted, forged pistons, the heat flux into the piston crowns and upper ring land areas...
Forum: Canada 06-20-2022, 08:41 PM
Replies: 31
Views: 4,622
Posted By rv6ejguy
Did you happen to ask this inspector what purpose...

Did you happen to ask this inspector what purpose a drain on the bottom of the filter would serve since in most RV-10s with root filters it's a couple inches higher than the drain on the tank? How...
Forum: Canada 06-19-2022, 09:50 PM
Replies: 31
Views: 4,622
Posted By rv6ejguy
I'll get Les Kearney to comment here in more...

I'll get Les Kearney to comment here in more detail. I understand a new information circular will soon be distributed to MDRA inspectors making all this crystal clear for them after claiming they...
Forum: Alternative Engines 06-19-2022, 11:58 AM
Replies: 66
Views: 7,930
Posted By rv6ejguy
Very cool! :cool: Keep us updated as you build...

Very cool! :cool: Keep us updated as you build more time on it.
Forum: Alternative Engines 06-19-2022, 08:22 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
I agree, without FWF kits and a company test/...

I agree, without FWF kits and a company test/ demo plane, I don't see anyone taking a big market share away from Lycoming any time soon.

The only other sub $85K only engines existing right now to...
Forum: Alternative Engines 06-17-2022, 05:52 PM
Replies: 42
Views: 3,709
Posted By rv6ejguy
I wasn't thinking market disruption as in...

I wasn't thinking market disruption as in substantially lower prices, more a second reliable and well supported choice that you don't have to wait 24 months for delivery.
Forum: Alternative Engines 06-17-2022, 01:40 PM
Replies: 42
Views: 3,709
Posted By rv6ejguy
EPI was developing this for a client:...

EPI was developing this for a client: http://www.epi-eng.com/aircraft_engine_products/aircooled_4-cyl_aircraft_engine.htm

Haven't heard anything more for about 6 months now but shows what can be...
Forum: Alternative Engines 06-17-2022, 12:43 PM
Replies: 42
Views: 3,709
Posted By rv6ejguy
The liability issues and small quantities are the...

The liability issues and small quantities are the reasons why you won't see an auto OEM skim complete engines off their regular production line for aircraft. That idea is dead right there and there...
Forum: Alternative Engines 06-17-2022, 11:09 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
The current backlog of RV kit orders means that...

The current backlog of RV kit orders means that hundreds of engines will also be needed to power them. Vans has only got busier over the years as certified aircraft prices skyrocket.

It would seem a...
Forum: Alternative Engines 06-17-2022, 09:47 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
My take is that few OEM automakers will knowingly...

My take is that few OEM automakers will knowingly supply engines off their assembly lines for Experimental or certified aircraft strictly from profit and liability standpoints.

I think to path to...
Forum: Alternative Engines 06-16-2022, 12:19 PM
Replies: 42
Views: 3,709
Posted By rv6ejguy
Dart engines in the US casts/ machines their own...

Dart engines in the US casts/ machines their own heads and blocks and say that they can produce these competitively in the US. I'd be willing to pay for a US made and supported engine even at a 30%...
Forum: Alternative Engines 06-16-2022, 09:48 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
Interesting when Lycoming has a 2 year backlog...

Interesting when Lycoming has a 2 year backlog and RV-10s are the largest consumer of Experimental 540s. Seems like an odd decision once they already had tooling and production up and running. I...
Forum: Alternative Engines 06-16-2022, 08:57 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
My criteria for a 540 alternative would be near...

My criteria for a 540 alternative would be near equal or better weight, fuel burn, power and maintenance hours per flight hour and of course better availability than 2 years and price in the same...
Forum: Alternative Engines 06-16-2022, 07:30 AM
Replies: 42
Views: 3,709
Posted By rv6ejguy
I assume because RVs are designed around...

I assume because RVs are designed around Lycomings but all it would take is for Conti to buy an RV-10 and engineer the mount and installation of a 550 and do the flight testing. Of course they...
Forum: Alternative Engines 06-15-2022, 05:17 PM
Replies: 42
Views: 3,709
Posted By rv6ejguy
Alternative Engines?

With Lycoming and other current aftermarket players seemingly unable to supply engine parts or engines in a timely fashion any more, it would appear to be a good time for someone new to step into the...
Forum: RV General Discussion/News 06-15-2022, 07:41 AM
Replies: 34
Views: 2,160
Posted By rv6ejguy
Congrats Kyle! :)

Congrats Kyle! :)
Forum: RV-10 06-13-2022, 09:15 AM
Replies: 10
Views: 1,408
Posted By rv6ejguy
Agreed. Some folks are fine to fly over the rocks...

Agreed. Some folks are fine to fly over the rocks at night single engine with their family and a Lycoming up front- but not me.
Forum: RV-10 06-13-2022, 08:44 AM
Replies: 10
Views: 1,408
Posted By rv6ejguy
Stuart is a smart guy but as you say here, claims...

Stuart is a smart guy but as you say here, claims must be backed up by real world numbers and flight time. When you are charging $45K for a FWF package it's a great idea to build a company demo plane...
Forum: RV-10 06-13-2022, 07:07 AM
Replies: 10
Views: 1,408
Posted By rv6ejguy
As someone who's been flying an alt engine for 19...

As someone who's been flying an alt engine for 19 years and supplying advice and EFI systems for hundreds of them over the last 25 years, I wouldn't call myself a naysayer but I'm tired of folks...
Forum: RV-10 06-12-2022, 04:46 PM
Replies: 10
Views: 1,408
Posted By rv6ejguy
I measured the takeoff run at around 23 seconds...

I measured the takeoff run at around 23 seconds so it doesn't get off the runway quickly as stated in the video, in fact that's double what a good 540 powered -10 takes with 2 aboard and full...
Forum: Traditional vs. Alternative Powerplants 06-03-2022, 07:36 AM
Replies: 23
Views: 1,908
Posted By rv6ejguy
Knock frequency varies between engines so a...

Knock frequency varies between engines so a sensor optimized for one engine may not be ideal on a different engine.

Std Lyc heads don't have good places to mount knock sensors as they were never...
Forum: Traditional Aircraft Engines 06-01-2022, 08:42 AM
Replies: 36
Views: 8,830
Posted By rv6ejguy
Does anyone know if Shell is still pursuing UL...

Does anyone know if Shell is still pursuing UL Avgas? Not much info from them after 2013.

How about Lyondell? They filed a patent circa 2019 if I recall.
Forum: RV General Discussion/News 05-31-2022, 09:03 AM
Replies: 13
Views: 1,975
Posted By rv6ejguy
GAMI isn't the only potential vendor to complain...

GAMI isn't the only potential vendor to complain about how PAFI has been run by the FAA.

No telling what influences are at work here from the outside. The only thing we do know is that this has...
Forum: RV General Discussion/News 05-31-2022, 07:00 AM
Replies: 13
Views: 1,975
Posted By rv6ejguy
I saw a letter today from George Braly basically...

I saw a letter today from George Braly basically saying that it appears GAMI's G100UL unleaded avgas will not be FAA approved any time soon for fleet wide use, so don't hold your breath.

The letter...
Forum: Traditional vs. Alternative Powerplants 05-30-2022, 06:41 AM
Replies: 23
Views: 1,908
Posted By rv6ejguy
With SDS CPI, CPI-2 or EM-5 systems, ignition...

With SDS CPI, CPI-2 or EM-5 systems, ignition timing is user programmable.

When burning 91 Mogas and using std compression ratios we normally retard timing at high MAP around 3-5 degrees so total...
Forum: Fuel Injection Systems 05-27-2022, 11:00 AM
Replies: 12
Views: 2,841
Posted By rv6ejguy
Not around the shop most of the day. Will try to...

Not around the shop most of the day. Will try to answer phone messages and email later today or on the weekend.
Forum: RV-10 05-23-2022, 03:09 PM
Replies: 10
Views: 1,254
Posted By rv6ejguy
We machine our own adapters. :)

We machine our own adapters. :)
Forum: RV General Discussion/News 05-22-2022, 06:56 AM
Replies: 32
Views: 8,746
Posted By rv6ejguy
Not something we make at this time.

Not something we make at this time.
Forum: RV General Discussion/News 05-22-2022, 06:55 AM
Replies: 32
Views: 8,746
Posted By rv6ejguy
Right around .500.

Right around .500.
Forum: RV General Discussion/News 05-22-2022, 06:51 AM
Replies: 35
Views: 6,368
Posted By rv6ejguy
If you're building for an investment, you're...

If you're building for an investment, you're building for the wrong reasons IMO. If my RV was worth zero by the time I'm ready to hang up the headphones, I'm ok with that. It's been a priceless...
Forum: Tools 05-15-2022, 08:01 AM
Replies: 24
Views: 3,109
Posted By rv6ejguy
Nice looking restoration Dan. Cool!

Nice looking restoration Dan. Cool!
Forum: Fuel Injection Systems 05-13-2022, 08:34 AM
Replies: 12
Views: 2,841
Posted By rv6ejguy
We've seen widely varied WB sensor life on 100LL-...

We've seen widely varied WB sensor life on 100LL- between about 2 and 450 hours. I have no idea why the huge variance.

The closed loop feature is mainly targeted for engines running unleaded fuels,...
Forum: Fuel Injection Systems 05-12-2022, 09:17 PM
Replies: 12
Views: 2,841
Posted By rv6ejguy
We're still working on the SD card code. It's...

We're still working on the SD card code. It's been very time consuming but looks like the end is sight on that (or is it?!! ). Finishing off the time stamp part this week. Hope to move onto the auto...
Forum: Fuel Injection Systems 05-12-2022, 03:37 PM
Replies: 12
Views: 2,841
Posted By rv6ejguy
YT Vid

Here's the promised video: https://www.youtube.com/watch?v=Yi0asWF0uuo

Please forgive some of my lazy editing here.

Systems for RV-10s continue to be our best selling. We are always working on...
Forum: Fuel Injection Systems 04-28-2022, 07:54 AM
Replies: 12
Views: 2,841
Posted By rv6ejguy
Not something I can normally do. In this case,...

Not something I can normally do. In this case, Les offered and it was a great reason not to be in the office that day. :)
Forum: Fuel Injection Systems 04-27-2022, 07:46 AM
Replies: 12
Views: 2,841
Posted By rv6ejguy
Update

Still working on SD card software but it continues to slowly come together. This is the most time consuming part of the whole EM-6 project.

Delays in receiving aluminum billet have slowed production...
Forum: Alternative Engines 04-15-2022, 07:27 AM
Replies: 32
Views: 12,078
Posted By rv6ejguy
Since you have an "in" here, could you ask George...

Since you have an "in" here, could you ask George about their ground durability and flight testing program? Must have done some prior to supplying production units.

Curious minds would like to know.
Forum: Alternative Engines 04-14-2022, 07:39 AM
Replies: 32
Views: 12,078
Posted By rv6ejguy
I've been asking these questions of Andrew for...

I've been asking these questions of Andrew for several years now. Crickets...

Some transparency and data would go a long way in prompting interest.
Forum: Traditional Aircraft Engines 03-26-2022, 09:08 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Dan, I was answering the question posed by David...

Dan, I was answering the question posed by David Z: "How much detonation margin is left with 91, 93 or 94 octane fuels on 7.5 pistons? 8.5 pistons? 9.0 pistons? There is a standard detonation test...
Forum: Traditional Aircraft Engines 03-25-2022, 07:27 PM
Replies: 109
Views: 7,992
Posted By rv6ejguy
You won't know without extensive dyno testing...

You won't know without extensive dyno testing across the whole range of IATs, CHTs, AFRs, RPMs, and ignition timing with various fuel octanes and CRs. Many runs to document all of that and rather a...
Forum: Traditional Aircraft Engines 03-25-2022, 12:08 PM
Replies: 109
Views: 7,992
Posted By rv6ejguy
With any single engined aircraft, there are...

With any single engined aircraft, there are multiple single points of failure awaiting if your luck has run out...

If it makes you feel any safer, you can specify 7.5 CR pistons to give wider...
Forum: Traditional Aircraft Engines 03-24-2022, 07:07 PM
Replies: 109
Views: 7,992
Posted By rv6ejguy
It won't be detonating with the power pulled back...

It won't be detonating with the power pulled back running full rich and the instrumentation will inform you it's running hot. We're talking about the 99.999% operational aspect here, not what you'll...
Forum: Fuel Injection Systems 03-24-2022, 09:37 AM
Replies: 12
Views: 2,841
Posted By rv6ejguy
Had a setback related to chip availability for...

Had a setback related to chip availability for the new SD board. Went from 35,000 to zero in a day so had to re-design for a different one. You never know in this business these days which is why we...
Forum: Traditional Aircraft Engines 03-24-2022, 09:09 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
The factory Lycoming tests are for worst scenario...

The factory Lycoming tests are for worst scenario conditions and were developed when a single analog CHT and EGT probes were common. In this past era, pilots may not have had a good idea where the...
Forum: Alternative Engines 03-24-2022, 07:59 AM
Replies: 24
Views: 4,809
Posted By rv6ejguy
Some good points here. A point on the Lycoming...

Some good points here.

A point on the Lycoming fuel burns though. Most folks operate LOP in cruise with BSFC figures closer to .42, rather than book Lycoming values ROP..

This would put the figures...
Forum: Traditional Aircraft Engines 03-20-2022, 09:31 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Detonation is related more to torque than hp....

Detonation is related more to torque than hp. BMEP is highest at peak torque. If you look at data from Ricardo and many others, they speak of detonation onset in relation to BMEP as this is...
Forum: Traditional Aircraft Engines 03-20-2022, 08:33 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Fairly close to some Sky Dynamics torque figures...

Fairly close to some Sky Dynamics torque figures I've seen for PV 540 builds.

Ron sent me a photo of the dyno setup. This was a load cell connected to a lever arm. Prop torque reacts the whole...
Forum: Traditional Aircraft Engines 03-19-2022, 09:18 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Yup, some of us already knew that... 2700 rpm...

Yup, some of us already knew that...

2700 rpm (still hadn't reached peak torque) 30", 100 ROP and 420 CHT are not benign conditions for detonation...

The BMEP would be over 180 psi which is fairly...
Forum: Traditional Aircraft Engines 03-17-2022, 09:47 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Ron was good enough publish his data here from...

Ron was good enough publish his data here from the Ly-Con dyno with the aim to demonstrate the detonation margin on his engine running on mogas. He went to some expense and trouble to do these runs...
Forum: RV-14 03-16-2022, 10:11 PM
Replies: 8
Views: 974
Posted By rv6ejguy
Greg, we have a number of RV-14s flying with SDS....

Greg, we have a number of RV-14s flying with SDS. I can put you in touch with one customer who has several hundred hours on his and he'll give you the straight goods.

Main advantages of EFI over...
Forum: Traditional Aircraft Engines 03-16-2022, 07:30 PM
Replies: 109
Views: 7,992
Posted By rv6ejguy
Some folks commenting here are hung up on...

Some folks commenting here are hung up on comparing Ron's results to a stock 540. This isn't stock. In particular the intake manifold and throttle body are significantly different with tapered...
Forum: Traditional Aircraft Engines 03-14-2022, 08:21 AM
Replies: 109
Views: 7,992
Posted By rv6ejguy
I agree. The scenario they found in this test...

I agree. The scenario they found in this test seems questionable. PCP and flame speed are both lower LOP than at ROP and these are the major detonation drivers involved if IAT and CHT remain...
Forum: Alternative Engines 03-14-2022, 08:14 AM
Replies: 24
Views: 4,809
Posted By rv6ejguy
A couple observations: Unless the turbine is...

A couple observations:

Unless the turbine is flat rated, don't expect altitude performance to be much better than a naturally aspirated piston engine of the same SL power. Turbine efficiency...
Forum: RV-10 03-13-2022, 07:21 PM
Replies: 28
Views: 3,830
Posted By rv6ejguy
Until the price of CI aero engines drop into a...

Until the price of CI aero engines drop into a similar realm as that of a 540 or Jet A prices drop a lot lower than Avgas, it doesn't make sense in North America at this time. There isn't a proven,...
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