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Search: Posts Made By: grubbat
Forum: Alternative Engines 04-09-2021, 08:04 AM
Replies: 11
Views: 2,117
Posted By grubbat
Rpm

What is the design rpm of this liquid piston engine?
I wonder if this would be a good candidate to drive a ducted fan?
Forum: Traditional Aircraft Engines 04-04-2021, 03:09 PM
Replies: 44
Views: 3,588
Posted By grubbat
Technically

Well technically, not changing the oil filter while changing the oil is liken to taking a shower and not changing underwear. Technically, it can be done , but ewwwww.
Forum: RV General Discussion/News 03-31-2021, 05:01 AM
Replies: 69
Views: 6,473
Posted By grubbat
I LOVE Marvel Mystery Oil

I absolutely LOVE marvel mystery oil ............
in my air tools.

My Lycoming io540 which has 20,000 hr total time and 3100 SMOH uses straight 50wt oil in summer and 20w multi in winter,...
Forum: RV-9/9A 03-19-2021, 06:12 AM
Replies: 35
Views: 2,627
Posted By grubbat
Speed

For my -9, I slow downwind just enough to add some flaps then add some power, over the numbers full flaps on calm day or max lift flaps on windy day and bleed power off with nose pointed downward....
Forum: RV-9/9A 03-16-2021, 07:19 AM
Replies: 22
Views: 2,461
Posted By grubbat
How

Step 1. TAke the RV-9 tail off and install RV-8 tail.
Step 2. Take both wings off and set in corner of shop.
Step 3. Do research on how to convert a Diesel engine to the RV airframe
Step 4. Ponder...
Forum: RV General Discussion/News 02-01-2021, 05:51 AM
Replies: 137
Views: 34,408
Posted By grubbat
Critical time

Engine failure at rotation is a handful and sobering event. Every twin driver does a mental scan of this possible event on EVERY takeoff. My plane with gear and flaps down wonít fly at rotation with...
Forum: RV General Discussion/News 01-04-2021, 09:03 AM
Replies: 2
Views: 809
Posted By grubbat
Opposite

Realistically, aircraft values have gone up year over year. Itís not like a car or a singlewide. Everybody hates taxes especially reoccurring ad valorum taxes on an asset that keeps going up up up....
Forum: RV-9/9A 01-04-2021, 12:50 AM
Replies: 29
Views: 4,242
Posted By grubbat
Wing tips

You could remove the big wingtips and put end plates on and save some wingspan but anything more would be extensive because the flaps and ailerons would have to be shortened. The wingtips have some...
Forum: RV Ongoing Maintenance Issues 01-03-2021, 06:52 PM
Replies: 17
Views: 1,702
Posted By grubbat
Earthx cutout

My Earthx cut power once. It was an unpleasant experience. Shouldnít have happened, but it did. The BMS can be a little snot sometimes.
Forum: RV-9/9A 01-03-2021, 02:25 PM
Replies: 29
Views: 4,242
Posted By grubbat
Guess

If I were to guess, I suspect the high aspect ratio wing performs less optimal pulling Gíg than the other standard Vans wings. I also suspect the longer span, and the longer horizontal are less...
Forum: My RV Build Project 12-24-2020, 09:56 PM
Replies: 12
Views: 2,940
Posted By grubbat
Good choice

You have joined a small but very wise group of -9 drivers. We have the best kept secret all-around flying model that Vans offers. You will love that wing and hopefully you will have your plane built...
Forum: Safety 12-24-2020, 09:52 PM
Replies: 61
Views: 8,945
Posted By grubbat
Steam AND Glass?????

So you had steam gauges and glass and the electrons went tangle uniform?
Imagine that. Your risk mitigation plan of having both steam and glass was a smart decision. You have now joined the club of...
Forum: RV General Discussion/News 12-18-2020, 10:43 AM
Replies: 32
Views: 4,501
Posted By grubbat
Combination is risk mitigation

I think it's smart to keep a simple steam A/S and Altimeter somewhere in the panel to go with all the nice electrons dependent stuff. I love glass when it works, and most of the time it works, but...
Forum: RV General Discussion/News 10-31-2020, 01:22 PM
Replies: 17
Views: 5,177
Posted By grubbat
Liability only

Liability only with not in motion for me. Filing a claim is almost a death sentence anyway, at least for 3 years.
Forum: RV General Discussion/News 10-25-2020, 09:50 AM
Replies: 10
Views: 1,967
Posted By grubbat
It depends

Well, it depends. If the Prebuy is a good one, then yes. If the Prebuy is sloppy, then no. However some pre-buys are unrealistic, pointing out things that are just stupid. Iíve seen my share of...
Forum: Southeast 10-24-2020, 08:37 PM
Replies: 14
Views: 2,344
Posted By grubbat
Taxes

The yearly ad valorum tax can be itemized but not the one time tax. We got snookered on that one. I went from paying 100 for a vehicle tag that was deductible to paying 2800.00 at the purchase of a...
Forum: RV-9/9A 10-24-2020, 11:49 AM
Replies: 25
Views: 5,895
Posted By grubbat
Reason

I would fathom that most people differenate the -9 and the other RV Ďs as either aerobatic or non-aerobatic (Vans states it in their sales literature) and thus they assume that the Gentlemanís...
Forum: Oregon 10-24-2020, 07:37 AM
Replies: 13
Views: 5,407
Posted By grubbat
Variation

Runways are runways. Houses are houses. Shops are shops. All those things are consistent and can be changed or altered relatively easy. People and taxes are another story. They will either make you...
Forum: RV-9/9A 10-24-2020, 07:22 AM
Replies: 25
Views: 5,895
Posted By grubbat
Other info

To some, having a lower stall speed, ability to take off in a couple of seconds and be at pattern altitude half way down the runway, routinely get 30mpg, and not sit tail low at 15,000 feet are kinda...
Forum: Safety 09-24-2020, 12:00 PM
Replies: 51
Views: 7,578
Posted By grubbat
Assume engine out

Every takeoff it is assumed engine out, unless proven otherwise.
Itís going to quit, one day. I assume it will be today and Iím focused and ready. So ready that sometimes a bit disappointed it...
Forum: RV-10 09-17-2020, 06:31 PM
Replies: 42
Views: 15,261
Posted By grubbat
260B

Bob, how long have you had the 260b? I thought you were restoring a 250.
The 1965 260 I had was a screamer as well. Sorry to let it go but the Star is a jealous mistress.
Forum: RV-10 09-17-2020, 11:51 AM
Replies: 42
Views: 15,261
Posted By grubbat
Though not required

I always add a little more gas than when I picked it up. Feels good to pay it forward.
Had a dude borrow the car, kept it all day, brought it back empty, and didnít buy any fuel for his plane as...
Forum: RV-10 09-17-2020, 06:43 AM
Replies: 42
Views: 15,261
Posted By grubbat
Actually....

The courtesy car belongs to the Aerostar. 😄
Forum: RV-10 09-16-2020, 11:06 PM
Replies: 42
Views: 15,261
Posted By grubbat
Ok

I stand corrected. Letís modify that to be TAS limited. Comanche still gets the courtesy car. 😜
Forum: Safety 09-07-2020, 07:10 AM
Replies: 53
Views: 10,983
Posted By grubbat
7?

Bill, are we up to 7 planes now? For some reason I thought we had 3 or 4.
Forum: RV-7/7A 09-03-2020, 08:07 AM
Replies: 19
Views: 2,402
Posted By grubbat
Deer thing

Why not mount a pair of those deer things in the tiedown hole. They are supposed to make a noise at speed. Probably canít hear them at 60mph but maybe they come alive at 180?
Forum: Safety 09-03-2020, 08:02 AM
Replies: 53
Views: 10,983
Posted By grubbat
Why the need to change to IAS l

I bet every airplane manufacturer has had this discussion about where to mark the for Indicated Airspeed. You want the best numbers. If you use 18,000 ft TAS, then the competition will eat your...
Forum: Safety 09-02-2020, 10:34 PM
Replies: 53
Views: 10,983
Posted By grubbat
Unzipped Rudder

Another design exceeded, another unzipped rudder, another fatality. Want more margins? Don’t exceed VNE, but if you anticipate you will, trashcan that zipped rudder and put a RV-8 rudder on it which...
Forum: Places To Fly...Things to See...Things to Eat 08-27-2020, 10:24 PM
Replies: 12
Views: 2,449
Posted By grubbat
South east camping

The heat is the least of my worries camping in summer in south. The real enemy are those darn knats which nothing kills and of course the mosquitoes. The mosquitoes donít like repellant but the knats...
Forum: RV-10 08-27-2020, 10:06 PM
Replies: 25
Views: 3,995
Posted By grubbat
Old

Corrosion and that blue wrap are the things to look out for as well as mistakes made by previous person. The blue wrap can be a nightmare to remove if itís been on there a couple of years and...
Forum: RV-9/9A 08-09-2020, 06:41 PM
Replies: 29
Views: 13,841
Posted By grubbat
First step is to

The first step is to confirm that your measurement system is accurate. In this case, your static lines, airspeed indicator, and so forth. Prior to that, do a 3-way GPS run, full throttle, at 8500 ft...
Forum: Safety 08-05-2020, 06:22 AM
Replies: 64
Views: 23,620
Posted By grubbat
Well said

Good point Dan. I forgot the troll angle.

I think of that troll stuff every time I see a post questioning the fact Vans uses TAS rather than IAS. Hopefully a service bulletin One day from Vans will...
Forum: Safety 08-04-2020, 08:09 PM
Replies: 64
Views: 23,620
Posted By grubbat
Rudder flutter

I imagine that if one experienced rudder flutter, then they may not be around to share the experience. Those things donít usually end up well for the pilot.

Since we are talking flutter with the...
Forum: RV General Discussion/News 07-19-2020, 01:56 PM
Replies: 70
Views: 19,642
Posted By grubbat
No change

55 yr old, ~500hr tailwheel, no change in rates for both the RV-9 and Aerostar.
Forum: RV-8/8A 06-28-2020, 06:40 AM
Replies: 15
Views: 3,342
Posted By grubbat
Guess

Probably because ground speed takes into consideration winds.

Carl, did you happen to try different RPMs at that altitude? Was the ~2400rpm the best all around efficiency wise? The CAFE reports (...
Forum: RV-12/RV-12iS 06-26-2020, 05:54 AM
Replies: 45
Views: 7,878
Posted By grubbat
First, I?d have a cup of coffee and then solicit...

First, I?d have a cup of coffee and then solicit input from this community. Then I?d consider self insuring, maybe buying an insurance company and call it 70plus, or maybe I?d consider liability only...
Forum: RV-9/9A 05-28-2020, 06:28 PM
Replies: 85
Views: 15,810
Posted By grubbat
Joke

This has got to be a joke. I?m done.
Forum: RV-9/9A 05-28-2020, 05:28 PM
Replies: 85
Views: 15,810
Posted By grubbat
Agree

I agree.
Or, do what the certified folks do and post the VNE using IAS at some predetermined altitude besides sea level.

For the OP, if you are going to be hanging out at those altitudes, have...
Forum: RV-9/9A 05-28-2020, 05:01 AM
Replies: 85
Views: 15,810
Posted By grubbat
What

Dude, no disrespect, but didn?t you read all the posts on this subject?

THE ONE ABOUT TAS?

This is about the dumbest thing I?ve read in quite a while except for maybe the guy who bought an...
Forum: GPS 05-06-2020, 07:10 PM
Replies: 19
Views: 4,505
Posted By grubbat
Panel Dock

Steve, I had a 720 and an airgizmo panel dock. Worked ok but it was huge. I was told the 740 fits the airgizmo but no joy. So, if you make a panel dock that fits the 740, please let me know. I?m...
Forum: RV-9/9A 05-04-2020, 08:49 PM
Replies: 64
Views: 11,159
Posted By grubbat
Please don?t tempt me. I?ve got a 290hp lycoming...

Please don?t tempt me. I?ve got a 290hp lycoming and a 3blade prop sittin on the hangar floor just waiting for a nice project.

By the way, Scott is just doing his job. A lot of kids now days don?t...
Forum: RV-9/9A 05-03-2020, 03:48 PM
Replies: 64
Views: 11,159
Posted By grubbat
The club

It is a nice thing to be at pattern altitude halfway down the runway. The CS prop and high HP give a very satisfying climb. Thousand one thousand two, lift off, climb like crazy, plenty of margin for...
Forum: RV General Discussion/News 04-18-2020, 07:43 AM
Replies: 11
Views: 1,585
Posted By grubbat
Aviation Insurance

I don?t think aviation insurance is going to go down anytime soon due to several high profile accidents (ie helicopter crashes), tornados over airports, and high dollar settlement cases (jury awards...
Forum: RV General Discussion/News 03-27-2020, 02:23 PM
Replies: 43
Views: 8,367
Posted By grubbat
Arrest where?

I asked my Brother where he heard about the arrest and he said it was Ohio, Indiana, or maybe Spain, hahahaha. Nothing like hearsay, especially from a non-aviation brother, hahaha. Well, it was a...
Forum: RV General Discussion/News 03-27-2020, 01:38 PM
Replies: 43
Views: 8,367
Posted By grubbat
Arrested in Indiana?

I heard a feller was arrested after he landed in Indiana. Was told to stay home and not fly and apparently he went anyway and was promptly arrested upon landing. Is that true? Anyone in Indiana heard...
Forum: RV-7/7A 01-15-2020, 02:41 PM
Replies: 73
Views: 17,003
Posted By grubbat
Direct

I don’t want to be mean or say anything that will trigger you, however, I don’t want to read about you in a NTSB report either.

So, with that in mind, are you $&@& ??? ��

20% really? Do you have...
Forum: RV Ongoing Maintenance Issues 01-07-2020, 05:30 PM
Replies: 19
Views: 4,655
Posted By grubbat
time......

I?ve got 3000hr SMOH on a pair of Lycoming IO540?s with 20,000hr total time. Good oil pressure, compression, and good oil analysis. The risk is that there will be less reusable parts at overhaul....
Forum: RV General Discussion/News 01-02-2020, 02:14 PM
Replies: 44
Views: 8,503
Posted By grubbat
Correction

Yes, Liability insurance for sure. Everything else is on me. Folks with a loan don?t have this option though.
Forum: RV General Discussion/News 01-02-2020, 01:39 PM
Replies: 44
Views: 8,503
Posted By grubbat
Another option

I got tire of the always going up insurance premium and self insured. That way, if I break my stuff, I?ve got to fix it and no worry about rising rates. If more people followed suite, then the...
Forum: RV General Discussion/News 01-02-2020, 06:06 AM
Replies: 29
Views: 4,207
Posted By grubbat
Structural

The RV-6 is structurally stronger as never having an inflight structural failure. However, the -6 has more variation in the build as many were built before process automation was implemented .

The...
Forum: RV General Discussion/News 12-27-2019, 12:30 PM
Replies: 55
Views: 8,227
Posted By grubbat
Depends

The Bonanza will ride smoother and will be faster as the -10 is TAS limited. However, assuming the acquisition cost is the same, the -10 will be less expensive to fly and maintain. Reliability may...
Forum: RV-12/RV-12iS 12-19-2019, 08:25 PM
Replies: 21
Views: 5,601
Posted By grubbat
Plan B - Liability Only

When I got my Aerostar, the Insurance folks wouldn?t even give me the time of day. It was NO before I could make a case. So, liability only it is. On my -9, no problem getting coverage but I?m still...
Forum: RV General Discussion/News 12-04-2019, 09:26 AM
Replies: 31
Views: 4,445
Posted By grubbat
Good explaination

Good post Scott. This clarified a lot to me and should be good info for prospective pilots. I loved my -3 and -6 but really like the -9. It just took me some getting used to as the wings respond a...
Forum: RV General Discussion/News 12-03-2019, 09:39 AM
Replies: 31
Views: 4,445
Posted By grubbat
Clarification

The -9 wing in my experience has a different response when it?s loaded as opposed to the other designs. I?m not diminishing your comment about floating as I agree with that. My point is that even...
Forum: RV General Discussion/News 12-03-2019, 06:57 AM
Replies: 31
Views: 4,445
Posted By grubbat
Scott is the expert but I will say this. The...

Scott is the expert but I will say this. The high-aspect wing on the -9 does not, in my free opinion, retain the energy that the wing on the -3 thru -8. What I could do in the -3,-4,-6,-7,-8 as far...
Forum: RV General Discussion/News 12-03-2019, 06:47 AM
Replies: 40
Views: 7,522
Posted By grubbat
Early Adopter to Earthx

I installed an Earthx in my -9 around 2015 and got 1 yr of service from it before it failed. The failure mode was no voltage due to the BMS doing its thing to protect the battery. The result of this...
Forum: RV General Discussion/News 11-30-2019, 08:27 PM
Replies: 31
Views: 4,445
Posted By grubbat
Nine vs seven

Van likes the -9 better.
Forum: RV-12/RV-12iS 10-04-2019, 05:53 AM
Replies: 33
Views: 7,629
Posted By grubbat
True

Decending out of 17,000 ft in the RV-9 which I rarely do but just a case in point, I?ve got to hold Indicated to around 130mph which trues out to around 180 mph. The modern EFIS makes this a...
Forum: RV General Discussion/News 09-28-2019, 08:29 PM
Replies: 45
Views: 11,038
Posted By grubbat
Rudder light

I mass balanced mine with a standard light assembly. Later when the tail beacon came out I removed the standard tail light and installed the tail beacon assembly. I did not rebalance the rudder...
Forum: RV General Discussion/News 09-27-2019, 07:55 PM
Replies: 45
Views: 11,038
Posted By grubbat
Tough

It?s tough to re read those accidents since some were folks we knew here. I never liked the zipper edge rudder. If made and maintained right, it?s safe and fine within parameters. Exceed parameters...
Forum: RV General Discussion/News 09-11-2019, 09:20 PM
Replies: 35
Views: 6,868
Posted By grubbat
Stock in LLC

I?ve heard of LLC purchasing the plane and when a new person was to have the plane, then they buy the LLC and change the address. Prevents a lot of FFA paperwork and terminates liability of previous...
Forum: RV Ongoing Maintenance Issues 08-27-2019, 06:28 AM
Replies: 51
Views: 91,810
Posted By grubbat
Nice

I like how that repair was done. More area to support the through bolt and a nice weld to boot. Nice job!

The danger for ?improving? an area such as this is that you could be moving the stress to...
Forum: Electronic Ignition Systems 06-02-2019, 06:31 AM
Replies: 218
Views: 51,027
Posted By grubbat
Adjust it a little?

So, if a feller wanted to limit his Surefly to 36.5 degrees max advance, then all he needs to do is install it at 1.5 degrees BTDC? That setting may aid in the starter kickback syndrome some folks...
Forum: RV General Discussion/News 05-20-2019, 02:13 PM
Replies: 41
Views: 26,052
Posted By grubbat
Interesting point

I wonder if builder could have removed the data plate and kept it. The insurance company could still sell the structure and avionics but the traceability back to builder would be difficult without...
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