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  #11  
Old 09-13-2011, 07:35 AM
ty1295 ty1295 is offline
 
Join Date: Aug 2011
Location: Jeffersonville, IN
Posts: 393
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Very nice review and fun to read. Congrats.

As far as the oil accumulator I can talk some on that as I have one in my "race car".

I personally would not build another race engine without one and I don't even try to go inverted in my car. I am fairly sure it has saved my motor as I went through 2 motors due to bearing failure (oil loss?) prior to installing it.

Here is similar to what I have.

http://www.summitracing.com/parts/CTR-24-006/

One side holds extra engine oil, other side is pressurized with air with a cylinder/spring in the middle. When the engine runs and builds pressure the accumulator stores that. If pressure drops the extra oil is pushed back into the engine under pressure.

I have an electric valve tied to my key on, so the engine never starts without already having oil pressure in the engine also.

I love it and for the cost worth its weight in gold at least for my application.

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RV9A First Flight 9/30/19
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  #12  
Old 09-13-2011, 07:45 AM
RV8R999 RV8R999 is offline
 
Join Date: Dec 2008
Location: na
Posts: 1,457
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for a non-inverted oil set-up wouldn't an accumulator just help pump more oil overboard since the oil pick-up is un-ported while inverted? I dunno..just asking?

Where does the accumulator dump the oil in an aviation set-up?
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  #13  
Old 09-13-2011, 08:21 AM
ty1295 ty1295 is offline
 
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Location: Jeffersonville, IN
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I can't answer to aviation but on my race car it is tied into the pressurized port of the engine (near oil filter). The breather issue would need addressed.
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RV9A First Flight 9/30/19
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  #14  
Old 09-13-2011, 08:31 AM
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rph142 rph142 is offline
 
Join Date: Feb 2007
Location: Walnut Creek CA
Posts: 513
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I happen to have a 1.5 qt unused moroso accumulator for sale if anyone is interested. I couldnt find space for it in my -3.

Nice flying and great motivation btw. I hope to compete in basic for sportsman in my 3 someday.
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The minimum number of planes one should own is one. The correct number is n+1, where n is the number of planes currently owned. This equation may also be re-written as s-1, where s is the number of planes owned that would result in separation from your partner.

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Last edited by rph142 : 09-13-2011 at 08:34 AM.
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  #15  
Old 09-13-2011, 09:18 AM
swixtt swixtt is offline
 
Join Date: Oct 2008
Location: CAD
Posts: 249
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very cool Darren, where did you do the training? i had some lined up but it fell through as he was too busy in the summer. he trains out of Bassano AB.
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  #16  
Old 09-13-2011, 09:48 AM
sandifer sandifer is offline
 
Join Date: Jan 2007
Location: NC
Posts: 664
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Darren, awesome 3rd flight. Why couldn't you have done that on the first two?
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  #17  
Old 09-13-2011, 12:41 PM
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WillyEyeBall WillyEyeBall is offline
 
Join Date: Jan 2007
Location: Daleville, AL
Posts: 343
Talking first contest

Darren, Congratulations and fantastic write up. I know this will encourage other RVers to at least attend an IAC event, and then take the BIG step to participate in their first competition. I've never had more fun than being around those upside down, vertical flying, precision pilots. Bringing an RV to a contest also gets a lot of attention.
Like you, always practicing and looking forward to the next contest.
Bill McLean
RV-4 Slider
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  #18  
Old 09-13-2011, 01:19 PM
Dave12 Dave12 is offline
 
Join Date: Oct 2010
Location: Elkton, Md.
Posts: 1,652
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Good Job, Hope to see you flying at OshKosh and Lakeland soon!
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  #19  
Old 09-13-2011, 02:13 PM
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N8RV N8RV is offline
 
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Location: Elkhart, Indiana
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Quote:
Originally Posted by Darren S View Post
... So what’s next ? Inverted oil and smoke system, join the airshow circuit and quit Dentistry….. er ….. maybe not, let’s not get carried away now shall we
Tell you what, brother ... give me some time to catch up to you and we'll quit dentistry together! We can form a competition team (The Yank-n-Banks?) and never look back.

Congrats on your first competition. Well done!
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  #20  
Old 09-13-2011, 09:59 PM
Darren S Darren S is offline
 
Join Date: Apr 2009
Location: Canada
Posts: 439
Default Some answers to questions

Thanks to all for the positive feed back.

I do hope my little post does get other RVers joining the IAC and thinking about aerobatics. Even if you don't enter a contests the training will make you know your airplane better and make you more comfortable in various situations.

One of the first things my instructor and I did was to explore the envelope of the plane. I told him that I had read about the possibility of getting into an inverted spin if I entered a loop too slow and thereby was nervous about doing them and about my ability to recover.

He said, "Let's go try". The RV's are designed very well and are quite forgiving in certain circumstances. If you fall out of a loop the plane will not enter an inverted spin without ALOT of cross controls while inverted. In other words you have to work to get the inverted spin started. If you fall out of a loop the plane will nose down and then you recover like we were all taught in Flight School. If inverted, roll upright and recover.

Next we would bank the plane at 75 - 80 degrees and pull the stick till we got a high speed wing stall. The stick shakes alot prior to this. He would say, "Darren the plane will talk to you, just listen". If the stick starts to shake like that, release back pressure. All this builds confidence and comfort with your plane. Worth every penny spent


Some RV's visiting the contest


Jeff - Here's a thread I found on VAF about using the oil accumulator. It's mounted to the firewall.

http://www.vansairforce.com/communit...ad.php?t=51286

I am seriously thinking of going this route rather than a full blown inverted oil system. I'll research more before I lay out some $$

Swixtt (sorry couldn't find your first name) - I did get the "aerobatics prohibited" placard removed by Jim Hrymack in Bassano, Alberta. It was then replaced by an "Aerobatics Mandatory" placard Jim gets busy in summer flying his Harvard in airshows so he actually just flew my RV once. I submitted the manoeuvres I wanted him to perform to Transport Canada and he signed off on those. He makes no qualms about the fact that during the testing, if the plane starts to come apart he is bailing out. In fact he practices his egress a few times on the ground. Kind of freaky watching..... not the kind of thing you want to visualize happen.

His friend Miles Crane did my training after that. Miles is very good and took first place in Intermediate this past weekend. Private message me and I can give you his number if you want.

Bill and Dave - thanks for the kind words.


A couple of Yakkies competing in Intermediate

Eric - Thanks for your critiques on my video when I posted it months ago.
I was amazed at how much you could see from just a helmet cam video. Your suggestions were appreciated and were helpful. There was only one other RV at the contest. It was the -6A in one of the pictures and he flew in Sportsman. As for why I couldn't fly like how I did in round 3..... well ......nerves I guess. I was only 1% behind first place after the first round but fell back in round two because I was so jacked up and pulling more G than needed. I needed to relax. Round 3 was done on day two after a flight home and a chance to chill out. One big thing I learned was to focus on flying smooth. It's a bit of an art to be able to pull to a line quickly and crisply but not overly aggressively. Sounds weird but that's how I see it.

Don - "The Yank and Banks" !! Sounds good. Let me know when our first team meeting is ..... Well being from Canada we're often referred to as "Canucks". You being a "Yankee" ......so how about "The Yank and 'Nucks" .......er..... well maybe not......sound too much like "yank my nuts" Wouldn't look good on the brochure.

Darren

Last edited by Darren S : 09-14-2011 at 09:06 AM.
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