|
RE: Ceramic Coated Exhaust...
I think the idea is preventing heat radiation keeps the exhaust gas temperature higher. Higher gas temperature has lower viscosity so less flow losses.
Posted on: 3/23/2012 5:08 AM by Author "Trinut"
in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11011656
RE: Do you own a valid passport?
I do. Been to Germany, England and France. Paris is my favorite so far. The Eifel Tower is just amazing to see in person. My kids do too. A couple of them went to France by themselves when they were teenagers. One of them is a French Minor, doing a semester of College there now. She just went to Nice, Monaco, Corsica, Pisa and Florance on her Spring Break. She is doing something in Alaska this summer, I'm not sure what. People in Europe travel to other countries the way we travel to other states, the countries are the size of states here.
Posted on: 5/4/2011 7:46 AM by Author "Trinut"
in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=10500862
RE: What creates lift with fully symetrical wing?
Thanks for fixing that, a cube has 3 sides!. I think people would guess a room full of air weighs less than it does. So a room, 10 x 20 x 8 foot cieling is 1600 ft^3 x .075 lb/ft^3 = 120 pounds
Posted on: 6/25/2010 4:59 PM by Author "Trinut"
in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=9826701
RE: What creates lift with fully symetrical wing?
A 100 x 100 ft room holds about 620 pounds of air, at .062 lbs/ft^2 and 100ft x 100ft = 10,000 ft^3 A 5 lb model helicopter hovering over a scale large enough to catch all the downwash would still read 5 lb the moment it breaks ground. An airplane wing does the same thing, creating downwash equal to the weight of the plane. It's just harder to run underneath the plane with a big scale as it is taking off to proove it ....[;)]
Posted on: 6/25/2010 2:37 PM by Author "Trinut"
in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=9826499
RE: OS .15 CV-A question.
Tower hobbies has about the same pipe if you like to order from them. Just search MAC's products It's the mac's tunned pipe 2.5 .10/.15 - about the same price. I bought one for a .15 LA after watching an OS .10 LA with one on youtube. (The OS 15 LA uses the OS 10 FSR/FP header).
Posted on: 2/2/2010 5:03 PM by Author "Trinut"
in the forum ""1/2 A" & "1/8 A" airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9470687
RE: Great Planes DR-1 ARF
paladin, I have one of these palnes - havn't flown it yet. But I have read that it helps to set (force) the landing gear fairing to a similar incidence as the wings. Maybe someone with first hand experience couild look at your photos and chime in?
Posted on: 12/29/2009 10:54 PM by Author "Trinut"
in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=9370771
RE: 1/2a Biplane
Thats it !!!!!!!! Thrue, 6 x 18 inch doesn't scale from that drawing of the actual plane. I scaled it from a .40 size published in American Modeler magazine - take a look http://www.rcgroups.com/forums/showthread.php?t=965961&highlight=hot+kanary Which cox engine/prop is that? I have a norvel big mig .049 I was thinking of using. Regarding the fast roll rate, the .40 size I am scaling from had ailerons on the bottom wng only, which I think I would do too, for such a short span. Thanks so much for posting your bipe, it really encourages me to give it a try.
Posted on: 12/14/2009 5:11 PM by Author "Trinut"
in the forum ""1/2 A" & "1/8 A" airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9330570
RE: 1/2a Biplane
Bipe flyer Yes I saw the wire-cut reproductions of the ace molded wings. I am familliar with the ace bipe that used them too - that was for a .10 or .15 What is unique abaout the bipe I am proposing is that it uses only one set, unjoined, so it would have about 200 sq inch wing area, the same as the simple series ment for 1/2a's. So it would be an 18 inch span negative stagger bipe for 1/2a. I'll try and frame someting up and post it ...
Posted on: 12/14/2009 4:44 PM by Author "Trinut"
in the forum ""1/2 A" & "1/8 A" airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9330500
RE: 1/2a Biplane
I am thinking of a 1/2 a bipe using one set of ace constant cord foam wings I had. After you add ailerons, they come out to a six inch cord, and each section is 18 inches long. I noticed this is the correct cord and wingspan for a scaled down Bill Warwick "hot canary", which is a negative stagger racing bipe. I found some planes on line for a 30'' span version for American Modeler Magazine and scaled those down. (Top flight did one at about 36 inch span for a .40) 18 inch span looks crazy small, but it is about the same proportions as the top flite sized one, and that flew .... It would be so simple to use the molded foam wings as they are, in their 18 inch sections. What do you think?
Posted on: 12/14/2009 3:56 PM by Author "Trinut"
in the forum ""1/2 A" & "1/8 A" airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9330386
RE: Building the House of Balsa A7 Corsair Propjet
I think it would be cool to scale one up for an inverted rear-exhaust .60, with a tuned pipe exhaust hidden in the fuse, coming out the tail.
Posted on: 10/27/2009 12:45 PM by Author "Trinut"
in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9206049
RE: Help me decide which airplane for an ASP Radial
A Ziroli "Spirit of St Louis" has exposed cylinders and calls for a g-62.
Posted on: 10/27/2009 12:30 PM by Author "Trinut"
in the forum "Giant Scale Aircraft - General"
http://www.rcuniverse.com/forum/fb.asp?m=9206003
RE: CESSNA 120
Bob Holman plans still has the Brian Taylor plans for a 62 inch one listed on his website. I bought these plans years ago but no longer have them. They are hand drawn, but buld into very nice models.
Posted on: 8/17/2009 11:30 AM by Author "Trinut"
in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9022740
RE: New Supertigre G90 with scratches on the piston.
As far as reed block, rotary valve and piston port goes, in this engine it is the hole in the crankshaft that periodically opens and closes under the carb that handles the job of allowing air/fuel in the crankcase, then sealing it off on the downstroke to allow the backside piston pressure to pump it into the cylinder through the ports.
Posted on: 5/20/2009 7:29 AM by Author "Trinut"
in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=8784011
RE: Taking Orders For Hanno Piston/Liner Sets
roguedog In addition to the exhaust port changes, the port opposite the exhaust port (transfer port) is wider than an RF as well. I don't know if the hanno liners were port matched in the block from O.S. since I don't have a hanno block to go by either. But if you look into that port there is a big mismatch. It doesn't seem like it would be very effective (making it wider) if the passage feeding it is still narrow.
Posted on: 4/30/2009 2:47 PM by Author "Trinut"
in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8729315
RE: Taking Orders For Hanno Piston/Liner Sets
I am planning on doing the same thing. I have one ringed RF liner to mod, a nelson liner, a 6P carb. I'm forced to use a perry pump. I have to mod standard RF blocks for both liners. Hey, you wouldn't happen to have any leads on another hanno 2 nipple pump? That is all I lack to have 1 complete Hanno. Thanks
Posted on: 4/30/2009 9:33 AM by Author "Trinut"
in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8728510
RE: os 61sf
I would think these old piped .60 size engines would have a hard time beating a super tiger .90 from a cost, weight and performance standpoint (at $119.00 it's lookiing pretty good in that respect). From a sound and nostalgia standpomt.....priceless :)
Posted on: 4/17/2009 6:19 PM by Author "Trinut"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=8690852
RE: os 61sf
Ok, I'll admit it, I think I paid a record price for a carb recently. Over $100.00 for a hanno special carb, 6P. I"m building a hanno special from parts, all new parts, in fact. It will be using a perry pump, and I'm port matching a standard RF block. And a Shadel piston/Liner. I'll try and get it together soon and post something. It's not really a hanno, just a fancy SF/RF ......
Posted on: 4/17/2009 6:06 PM by Author "Trinut"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=8690820
RE: Which Covering ?
I have read that you can use monokote trim with the windex method over Ultrakote, so you get the advantages of both.
Posted on: 3/27/2009 8:25 AM by Author "Trinut"
in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=8621182
RE: 07 TopFlite Stinson build
Nice! Could you give some details regarding the motor, type of finish and final weight? How did you make the Gullwing Airlines logo? I was thinking of doing the blue and white version. Thanks.
Posted on: 11/16/2008 8:13 PM by Author "Trinut"
in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=8154217
RE: Anyone flown with the new OS 200 pumped 4-stroke?
The FS200S used to be rated at 2.9 at 9000rpm. I think it was increased to 3.0, the same as the pumped version, becase it now shares the same cylinder head as the pumped version, which has a larger intake valve than the original design. So the pumped version didn't get less power, the older non-pumped version got more, I think.
Posted on: 10/2/2008 7:12 AM by Author "Trinut"
in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8011442
RE: How does carbon fiber veil and dope add strength to balsa?
You could think of carbon veil as millions of lillte ropes. They just pile up or buckle if you push on them (compression), but when you pull on them (tension) they can carry huge loads, but only in the direction they are pointing. So they weave them into somehting like a cargo net so they can take loads in many directions. Now, how to hold the cargo net in alignment so it can do its job? This is the olny purpose for the epoxy. It doesn't add much stiffness by itself. I agree that epoxy is better, but dope is lighter and IF the carbon doesn't delaminte it is a good choice for that particular application and would be just as stiff (at least untill it delaminates). An example of this is a model covered in silk and dope. Silk is about as light an flexible as you can get, but when it is doped on to a structure and the silk fibers are put in tension by shrinking and held in alignment by the dope, it adds a geat deal of stiffness. So much so that when you crash the model, you often still have a nice silk "bag" containing all the pieces!
Posted on: 7/25/2008 2:18 PM by Author "Trinut"
in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=7771355
RE: Bernoulli vs Newton
This is from the NASA website. It talks about swimsuit design for the US olympic team. The previous post talks about the similarities of water and air flow, so I posted it to show "Studious" types are aware of the similarities! One area Wilkinson focuses on is drag reduction … how to make something propel though air or water faster and more efficiently. That was Wilkinson's task for Speedo … to test swimsuit material for drag. "We evaluated the surface roughness effects of nearly 60 fabrics or patterns in one of our small low speed wind tunnels," said Wilkinson. "We were assessing which fabrics and weaves had the lowest drag. The tests have generally shown the smoother the fabric, the lower the drag." But how can you test a material that's supposed to be used in water in a wind tunnel that uses air? It turns out that air and water obey the same physical laws of motion, so a wind tunnel can simulate similar drag a fabric would experience in water. Testing in air is also less expensive, simpler and offers more testing options than testing in water.
Posted on: 7/7/2008 10:04 AM by Author "Trinut"
in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=7702500
RE: OS FS-200S Pump
Maybe the smaller intake valved head is obsolete now, and all new non-pumped and pumped engines, and people buying a replacemant heads, will get the same head, with the larger intake valve.
Posted on: 7/5/2008 2:39 PM by Author "Trinut"
in the forum "O.S. Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=7696807
RE: Stinson sr-9
Thanks for posting the pictures, it looks great. It is inspirational for those of us trying to finish one of these kits, like myself. Very nice color scheme, well done rib tapes and rivets. Can you give any more details on the covering and paint used, and if it needed nose weight with the O.S. 160 twin? Thanks again!
Posted on: 6/24/2008 7:09 AM by Author "Trinut"
in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=7654521
RE: USAF Tanker competition to be rerun!
I was reading about the Boeing 787 today. Major assemblies come from other countries and it is bolted together here. It is one of the reasons the maiden flight is delayed - the suppliers (often offshore) are responsible for more. I'm not sure what on shore/off shore means anymore. I sure hope Boeing gets it, and that will be good, but I don't think it would be the same as a pre-globalization Boeing getting it.
Posted on: 6/18/2008 8:04 PM by Author "Trinut"
in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=7635118
RE: Top Flite Stinson/OS 120AX
I have one about ready for covering. There is one on this forum with a Moki 1.35. Mine is set up for a Webra speed 1.20, which the instructions say swings up to an 18-6 prop for scale flying, so I guess I am thinking like you. I think that means no fabric and paint covering unless you want to add nose weight, though. The OS 200s and YS 140 4-strokes would be good, lightweight engines too.
Posted on: 6/13/2008 7:20 AM by Author "Trinut"
in the forum "Giant Scale Aircraft - General"
http://www.rcuniverse.com/forum/fb.asp?m=7614142
RE: GAS Saito
YS is testing a spark ignition for their 1.70. It still uses glow fuel (with nitro). I wonder what the Saito 2.20 would do with an alcy carb and methanol? The YS gets better fuel economy, no kickback, etc. I like the benefits of ignition, and I like the cooler running, lack of fumes, and the smell of glow.
Posted on: 5/23/2008 12:43 PM by Author "Trinut"
in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=7531668
RE: 07 TopFlite Stinson build
I use some isopropyl rubbing alcohol in the water, instead of amonia. I just finished sheeting the fuse and making the doors. I used balsa in the door jams instead of ABS like the plan shows. I soak the wood and wrap in around something of the same radius (as the corner of the door). When it dries it holds its shape. Also, I used 1/8 inch radio shack rare earth magnets to hold the doors shut instead of making a latch. They hold the doors firmly shut against the fuse.
Posted on: 1/30/2008 12:09 PM by Author "Trinut"
in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=6996068
RE: Spruce Goose plans anyone?
Laddie Mikulasko did one for speed 400 motors, I think in MA magazine a few years ago? Like Bass1 said, the memory is gone!
Posted on: 8/27/2007 11:38 PM by Author "Trinut"
in the forum "Giant Scale Aircraft - 3D & Aerobatic"
http://www.rcuniverse.com/forum/fb.asp?m=6296333
RE: Solartex Painting Question
Khodges, could you share some pictures of your DR1? In the meantime, I'm ready to cover a BUSA Dr1, and what you did sounds good to me. I would like to do a streaky-brown finish (Herman Gohring's plane, predominantly white nose and tail, the rest streaky brown). Could you share a few more details? Which Dr1 are you duplicating? How did you do the streaky brown finish? (ex. how much do you thin the paint, what brush, etc.) Thank you in advance...
Posted on: 12/8/2005 10:32 AM by Author "Trinut"
in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=3631239
| 
