RV-8
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- Rank 6
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Re: RV-8
Adam,
I noticed that one of your requirements was to get in and out of short strips. I find with my Thorp T-18 that has a C/S prop, I am able to land shorter than the fixed pitch guys. The RV 8 will have no problem getting out of short strips but with the high pitch it may not slow down as quickly as a C/S prop when you chop the power. I operate out of a 2000 ft paved strip and consistently have it stopped in 1200-1500 ft. The fixed pitch Thorp guys like to use 2500 ft as their minimum.
Jim
I noticed that one of your requirements was to get in and out of short strips. I find with my Thorp T-18 that has a C/S prop, I am able to land shorter than the fixed pitch guys. The RV 8 will have no problem getting out of short strips but with the high pitch it may not slow down as quickly as a C/S prop when you chop the power. I operate out of a 2000 ft paved strip and consistently have it stopped in 1200-1500 ft. The fixed pitch Thorp guys like to use 2500 ft as their minimum.
Jim
Re: RV-8
I think MapleFlap hit the nail on the 'want' vs. 'need'. I think the factor of dollars per performance number should be looked at in detail aswell. Firewall Forward is still many years and many rivets away.
I did (finally) order the tail kit today with the electric trim option. I'm pretty excited to say the least. Earlier this year I was able to buck some rivets on a couple of practice kits that turned out well. Learned a lot on the practice kits, and I have A LOT more to go!
I did (finally) order the tail kit today with the electric trim option. I'm pretty excited to say the least. Earlier this year I was able to buck some rivets on a couple of practice kits that turned out well. Learned a lot on the practice kits, and I have A LOT more to go!
--Air to Ground Chemical Transfer Technician turned 4 Bar Switch Flicker and Flap Operator--
Re: RV-8
If you buy a left hand turning engine, why not just change the camshaft?
Rule books are paper - they will not cushion a sudden meeting of stone and metal.
— Ernest K. Gann, 'Fate is the Hunter.
— Ernest K. Gann, 'Fate is the Hunter.
Re: RV-8
Here's an update on my project. I've got lots to do yet. I'm still deciding on a primer before I go to town bucking rivets.
Horizontal Stab
Vertical Stab
Horizontal Stab
Vertical Stab
--Air to Ground Chemical Transfer Technician turned 4 Bar Switch Flicker and Flap Operator--
Re: RV-8
yes..
The mags will need to be changed to the opposite rotation as well,,
Although, if you are overhauling it anyway, it wont add any expense.
Just thought of something else, the oil pump and accesorie case might be different on the L engine as well...
Id have to look at the ipc ..
nonetheless,, I still think you could do it way cheaper, as the L engines are quite abit cheaper than the normal unit.
The mags will need to be changed to the opposite rotation as well,,
Although, if you are overhauling it anyway, it wont add any expense.
Just thought of something else, the oil pump and accesorie case might be different on the L engine as well...
Id have to look at the ipc ..
nonetheless,, I still think you could do it way cheaper, as the L engines are quite abit cheaper than the normal unit.
Rule books are paper - they will not cushion a sudden meeting of stone and metal.
— Ernest K. Gann, 'Fate is the Hunter.
— Ernest K. Gann, 'Fate is the Hunter.
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Re: RV-8
I'm not sure about the RV-8, but most singles off-set the vertical stab to counteract the torque of a right turning engine. Using a left turning engine would require lots of rudder input in cruise, and possible control problems at slow speed.
Sarcasm is the body's natural defense against stupidity
- structurespilot
- Rank 1
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- Joined: Mon Jul 06, 2009 8:13 am
- Location: Calgary, Alberta
Re: RV-8
Hello I just thought I'd give you my two cents. I've built an RV 7 for Van's. I built a quick build for the factory in oregon as a Canadian trial experiment. In the end the dollar rising killed me and I couldn't compete with the paso. My current career is as a structures AME in YYC, but I also have a Commercial MIFR, and I tow banner on the side for extra cash.
I would be happy to answer any question you have about structures, especially Van's Aircraft. Van's does a great job of keeping the drawings, etc. in laymans terms, but you might come across something you are wondering about.
If I were building, I would chose FP prop. Less maintenance, less cost to purchase, and send for rebuild when due. Less money buy leaps and bounds, for sure. Do a little digging and you will soon agree. Well if performance was all you wanted you would be building a Harmon Rocket, Van's is all about the best comprimise, and best bang for your buck right?
Have fun, and enjoy the building process, hope to hear from you. Let me know how you are doing.
Norm..
I would be happy to answer any question you have about structures, especially Van's Aircraft. Van's does a great job of keeping the drawings, etc. in laymans terms, but you might come across something you are wondering about.
If I were building, I would chose FP prop. Less maintenance, less cost to purchase, and send for rebuild when due. Less money buy leaps and bounds, for sure. Do a little digging and you will soon agree. Well if performance was all you wanted you would be building a Harmon Rocket, Van's is all about the best comprimise, and best bang for your buck right?
Have fun, and enjoy the building process, hope to hear from you. Let me know how you are doing.
Norm..
- Rudder Bug
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- Location: Right seat but I own the seat
Re: RV-8
Awesome Adam, congrats!
Please keep them coming as you are progressing. I have abandoned my VJ-22 Volmer amphib project when I acquired a Tri-Pacer. Two years later I still give her a whole lotta love. Just done with a new interior. Now I'll tell you what: a sewing machine is the greatest invention of all times!
Giles
Please keep them coming as you are progressing. I have abandoned my VJ-22 Volmer amphib project when I acquired a Tri-Pacer. Two years later I still give her a whole lotta love. Just done with a new interior. Now I'll tell you what: a sewing machine is the greatest invention of all times!
Giles
Flying an aircraft and building a guitar are two things that are easy to do bad and difficult to do right
http://www.youtube.com/watch?v=3Yd_QppdGks
http://www.youtube.com/watch?v=3Yd_QppdGks
- Beefitarian
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Re:
I've got some more time and money to pound away at the project again. NAPA 7220 Self Etching Rattle Can Primer -- Any thoughts anyone? Between that and some Sherwin Williams Self etching, they both seem very common.Beefitarian wrote:Did you pick a primer?
--Air to Ground Chemical Transfer Technician turned 4 Bar Switch Flicker and Flap Operator--
Re: RV-8
Update:
I have the entire tail built, less the trim tab. I wanted to build riblets instead of just bending the sides down on the trim tab. Plans call to bend the sides and install blind rivets. The bending looks like a pain in the ass to get right, and a lot of builders are opting to install riblets. I think I will just order some....now I have an excuse to put the order in...
So right now, I just need to tear everything apart, debur, dimple, and prime. I'm starting with the horizontal stab.
I did some dimpling on the horizontal stab and started on the left hand side. For some stupid reason I was dimpling the for and aft spar web, including the flange attach points on the ribs. Call outs are for blind rivets .... not flush! Well, that mistake cost me $120, but now I can buy those riblets.
I'm finally jumping into the priming scene. Here is a pic of the right horizontal stab interior structure. The primer looks great and dry's extremely fast. I will let it cure for a few days before I start assembly for riveting. A couple runs here and there, but I have never really primed/painted anything. Not that you will see it anyways. I think I am applying a little heavy though, as it should just be a light dusting.
Here is some more food for thought that I am now seriously considering! I would like some input from you guys on the Rotec R3600 engine. I know this is the extreme other end of my initial thoughts on the engine but this idea is really swaying my thoughts. There is a guy that is doing a spectacular job on experimenting with the nine cylinder R3600 radial on an RV-8. The numbers should be close to the 150HP O-320, but I would suspect slightly slower with the draggy nose. This guy plans on producing radial conversion kits in the latter parts of 2012, so it will for sure be available by the time I get around to engine hanging.
The R3600 (new) comes with all accessories and is about the same price as a O-320 less accessories (new). As it stands right now, the R3600 was launched in 2000 and they come with a recommended 1000hr TBO. You can say you blow over the 1000hr mark no problem, and they plan on upping the TBO in the near future, but only once more data from customers comes in. Apparently overhauls are significantly cheaper than the Lycoming O-320 as well. I still have to do some more research and see if you can have options like a constant speed propeller. I really do not know much about the Rotec engines so any insight from the avcan crew would be great.
The only downside is speed and potentially no option for a contant speed prop. I like how unique it is, the potential savings even for a new engine, I like the idea of sipping fuel and making noise!
Anyways, here is a picture to drool on and check out the facebook page below.
https://www.facebook.com/radialconversions
http://www.rotecradialengines.com/0RotecR3600/R3600.htm
So....what do you think of that sexy beast?!
I have the entire tail built, less the trim tab. I wanted to build riblets instead of just bending the sides down on the trim tab. Plans call to bend the sides and install blind rivets. The bending looks like a pain in the ass to get right, and a lot of builders are opting to install riblets. I think I will just order some....now I have an excuse to put the order in...
So right now, I just need to tear everything apart, debur, dimple, and prime. I'm starting with the horizontal stab.
I did some dimpling on the horizontal stab and started on the left hand side. For some stupid reason I was dimpling the for and aft spar web, including the flange attach points on the ribs. Call outs are for blind rivets .... not flush! Well, that mistake cost me $120, but now I can buy those riblets.
I'm finally jumping into the priming scene. Here is a pic of the right horizontal stab interior structure. The primer looks great and dry's extremely fast. I will let it cure for a few days before I start assembly for riveting. A couple runs here and there, but I have never really primed/painted anything. Not that you will see it anyways. I think I am applying a little heavy though, as it should just be a light dusting.
Here is some more food for thought that I am now seriously considering! I would like some input from you guys on the Rotec R3600 engine. I know this is the extreme other end of my initial thoughts on the engine but this idea is really swaying my thoughts. There is a guy that is doing a spectacular job on experimenting with the nine cylinder R3600 radial on an RV-8. The numbers should be close to the 150HP O-320, but I would suspect slightly slower with the draggy nose. This guy plans on producing radial conversion kits in the latter parts of 2012, so it will for sure be available by the time I get around to engine hanging.
The R3600 (new) comes with all accessories and is about the same price as a O-320 less accessories (new). As it stands right now, the R3600 was launched in 2000 and they come with a recommended 1000hr TBO. You can say you blow over the 1000hr mark no problem, and they plan on upping the TBO in the near future, but only once more data from customers comes in. Apparently overhauls are significantly cheaper than the Lycoming O-320 as well. I still have to do some more research and see if you can have options like a constant speed propeller. I really do not know much about the Rotec engines so any insight from the avcan crew would be great.
The only downside is speed and potentially no option for a contant speed prop. I like how unique it is, the potential savings even for a new engine, I like the idea of sipping fuel and making noise!
Anyways, here is a picture to drool on and check out the facebook page below.
https://www.facebook.com/radialconversions
http://www.rotecradialengines.com/0RotecR3600/R3600.htm
So....what do you think of that sexy beast?!
--Air to Ground Chemical Transfer Technician turned 4 Bar Switch Flicker and Flap Operator--
- Beefitarian
- Top Poster
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- Joined: Wed Dec 01, 2010 10:53 am
- Location: A couple of meters away from others.
I love that engine. Here's a thread on another forum by a guy running one in a Sopwith Pup replica. It quit him once but the discussion came to the conclusion he had some carb ice. I don't know if he has any way to produce carb heat. I would be trying to figure out a way to have carb heat in an carborated airplane engine personally.
So anyway there's a bunch of WW I replica guys running these on that forum so they chat about it lots.
http://www.theaerodrome.com/forum/repli ... h-pup.html
So anyway there's a bunch of WW I replica guys running these on that forum so they chat about it lots.
http://www.theaerodrome.com/forum/repli ... h-pup.html
- Rudder Bug
- Rank 10
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- Joined: Thu Jun 23, 2005 11:09 pm
- Location: Right seat but I own the seat
Re: RV-8
What a beautiful engine Adam. It wil certainly make your RV very attractive and a one, well, a two of a kind!
Regarding your painting, just MIST a very, very, very, very, very THIN coat at a time. Talk to yourself and resist the temptation to ovespray. After a few coats, (read SEVERAL), you'll see it becoming more and more glossy, with no runnings at all. You will get to a point where the item will appear wet; that's when you are done.
Remember, the best way to save a lot of time is to TAKE YOUR TIME! You probably already found by now that sanding some runnings is no fun and time consuming.
Painting will get easy and fun if you stick to that rule.
I like your "box" setup, you're doing real good!
Gilles
P.S.: TAKE YOUR TIME!
Regarding your painting, just MIST a very, very, very, very, very THIN coat at a time. Talk to yourself and resist the temptation to ovespray. After a few coats, (read SEVERAL), you'll see it becoming more and more glossy, with no runnings at all. You will get to a point where the item will appear wet; that's when you are done.
Remember, the best way to save a lot of time is to TAKE YOUR TIME! You probably already found by now that sanding some runnings is no fun and time consuming.
Painting will get easy and fun if you stick to that rule.
I like your "box" setup, you're doing real good!
Gilles
P.S.: TAKE YOUR TIME!
Flying an aircraft and building a guitar are two things that are easy to do bad and difficult to do right
http://www.youtube.com/watch?v=3Yd_QppdGks
http://www.youtube.com/watch?v=3Yd_QppdGks
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- Top Poster
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- Location: West Coast
Re: RV-8
Too bad they don't make a twin row version........Adam Oke wrote:Update:
I have the entire tail built, less the trim tab. I wanted to build riblets instead of just bending the sides down on the trim tab. Plans call to bend the sides and install blind rivets. The bending looks like a pain in the ass to get right, and a lot of builders are opting to install riblets. I think I will just order some....now I have an excuse to put the order in...
So right now, I just need to tear everything apart, debur, dimple, and prime. I'm starting with the horizontal stab.
I did some dimpling on the horizontal stab and started on the left hand side. For some stupid reason I was dimpling the for and aft spar web, including the flange attach points on the ribs. Call outs are for blind rivets .... not flush! Well, that mistake cost me $120, but now I can buy those riblets.
I'm finally jumping into the priming scene. Here is a pic of the right horizontal stab interior structure. The primer looks great and dry's extremely fast. I will let it cure for a few days before I start assembly for riveting. A couple runs here and there, but I have never really primed/painted anything. Not that you will see it anyways. I think I am applying a little heavy though, as it should just be a light dusting.
Here is some more food for thought that I am now seriously considering! I would like some input from you guys on the Rotec R3600 engine. I know this is the extreme other end of my initial thoughts on the engine but this idea is really swaying my thoughts. There is a guy that is doing a spectacular job on experimenting with the nine cylinder R3600 radial on an RV-8. The numbers should be close to the 150HP O-320, but I would suspect slightly slower with the draggy nose. This guy plans on producing radial conversion kits in the latter parts of 2012, so it will for sure be available by the time I get around to engine hanging.
The R3600 (new) comes with all accessories and is about the same price as a O-320 less accessories (new). As it stands right now, the R3600 was launched in 2000 and they come with a recommended 1000hr TBO. You can say you blow over the 1000hr mark no problem, and they plan on upping the TBO in the near future, but only once more data from customers comes in. Apparently overhauls are significantly cheaper than the Lycoming O-320 as well. I still have to do some more research and see if you can have options like a constant speed propeller. I really do not know much about the Rotec engines so any insight from the avcan crew would be great.
The only downside is speed and potentially no option for a contant speed prop. I like how unique it is, the potential savings even for a new engine, I like the idea of sipping fuel and making noise!
Anyways, here is a picture to drool on and check out the facebook page below.
https://www.facebook.com/radialconversions
http://www.rotecradialengines.com/0RotecR3600/R3600.htm
So....what do you think of that sexy beast?!
Re: RV-8
I would use this engine,, perhaps on a cub or some other slow aircraft.. but not on an RV
Keep it lycoming... simple, easy, and they dont quit..
Keep it lycoming... simple, easy, and they dont quit..
Rule books are paper - they will not cushion a sudden meeting of stone and metal.
— Ernest K. Gann, 'Fate is the Hunter.
— Ernest K. Gann, 'Fate is the Hunter.
- Beefitarian
- Top Poster
- Posts: 6605
- Joined: Wed Dec 01, 2010 10:53 am
- Location: A couple of meters away from others.
Re: RV-8
I'm having a tasty single malt here so I may owe everyone apologies later but... If it's the same as my gear driven reverse rotational cam shaft modification in a small block chevy, you only need to change the drive gear so the mags still turn the same direction. Any AME dudes care to jump in?AEROBAT wrote:Strega wrote:If you buy a left hand turning engine, why not just change the camshaft?
Strega,
I could be wrong but don't you have to change the mags as well?
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Re: RV-8
Make a double row with the 7 cyl R2800 110hp engine. 14 cylinders and ~200hp. That's closer to the power that an RV8 should have.Big Pistons Forever wrote:Too bad they don't make a twin row version........
Sarcasm is the body's natural defense against stupidity
Re: RV-8
Here is an update for those who have been following my build. The horizontal and vertical stab are both built and ready for the MD-RA preclose inspection. Thanks to all those interested and wanting updates! Now I'll have to wait until I get back from a forestry contract before I can start priming and riveting the rudder. Does it ever feel good to hit milestones like this, where it actually looks like airplane parts.