RE: Sig King Kobra build
I would consider facing the formers with 1/64" Lite ply. The Kougar formers break or crack easily with a hard landing. The wing is indestructible. The King Kobra is a great flying airplane. I don't use retracts but would like to purchase your wire gear. We will watch your progress with interest. Bill
Posted on: 5/21/2013 9:22 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11518886

RE: PHOENIX MODELS F-20 TIGERSHARK ?
Sygy00 A couple of miscellaneous thoughts. Many airplanes during WWII left part of the wheel extend into the airstream when retracted. Wing loading of 28.5 oz./sq. ft. is likely to mean 29mph landing speed. The speed is comfortable at a flight field but dangerous to the trees and airplane at my home. I can follow your flaperon and fence advice but need to design compromise the landing speed for the two environments that I fly. Thanks for your great advice. Bill
Posted on: 5/20/2013 8:20 PM by Author "BillS" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11517801

RE: Correcting incidence
Vic, A new standard Kougar plastic cowl needs to be fitted. The last time I fitted a cowl it took 30 days. Bill
Posted on: 5/20/2013 7:47 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11517767

RE: Correcting incidence
[quote] But that's waaaayyyy over the top for what Bill was asking in his original post, No? For Bill, getting things back to some semblence of correctness is most important [/quote] Matt, Your astute assessment of the task and my ability is amazing. Almost no one understands the degree of difficulty for a non builder. It took ten days to get a semblance of correctness but I am happy with the results. In the beginning the task was considered impossible. The next similar project will take half the time Now I am attempting to decide if I can fit a new cowl. But one should not overstay their welcome. THANKS EVERYONE except for one agitator. It is not a given that others have knowledge to share. I have decided to skip over and ignore anything from Mr. Hates Everyone. It is entirely possible that he is 15, has no airplane experience, has no airplanes,, and is simply a blow hard and trouble maker. The following URL gives a general idea of what my company does. The work presented by my customers is very neat. http://www.engsw.com/drawroom/ Bill
Posted on: 5/20/2013 6:22 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11517650

RE: Correcting incidence
"Bill, Hope to see your straightened out Kouger in a month at the Speed Rally. You will be allowed plenty of test time if you need to get the lay of the field sorted out. " Vic, I finished the saddle today and measured 5/16" lower wing at the front. The airplane has a double chin. Hope to put in test flights this week. Without help from this forum I would not have been successful. Bill
Posted on: 5/19/2013 7:28 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11516615

RE: Correcting incidence
Post 70 For anyone interested the CAD program preformed the calculations. The print appears to be from acad or an acad derivative. Zero trigonometry knowledge is required. Zero understanding of transcendental functions are required. Any modern CAD (Computer Aided Design) program will report angular dimensions. One wonders if poster 70 knows the formula for the sine of theta or how to look the value up in the trig tables? Bill
Posted on: 5/19/2013 11:44 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11516158

RE: Correcting incidence
EJWash1, The workmanship is very pretty. I learned something by seeing how you jigged the airplane. Bill
Posted on: 5/19/2013 11:36 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11516151

RE: Correcting incidence
Post #70. Which CAD program were you using? Bill
Posted on: 5/18/2013 3:15 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11515389

RE: Correcting incidence
I hope to end up with incidence designed for the Kougar, Zero, Zero, Zero. How I have been adjusting the incidence. I use a short level and a Robert Incidence Meter and a bunch of shims under the wheels. First I disconnect the aileron linkage and clamp both to centered. I set the airplane wheels on the shims and level the horizontal stabilizer with the shims until both sides of the stabilizer are level and the same. I then tape the shims together as a set for each wheel. Then I check the incidence on each wing and make notes. I remove the wing from the airplane and shim the saddle with a short 1/2 " shim at the appropriate location. I put the wing back on and check the incidence on both sides again. The process is repeated until the incidence is very close. When close I slide soft balsa with glue in the gaps between saddle to wing. The soft balsa is sanded and the saddle gap is checked periodically. I also have a set of micrometers and vernier calipers. Usually I feel funny measuring wood with a micrometer. Also it is easy to calculate angles from measurements which I usually do with props. vicman is correct I fly mostly upright but believe that 4 degrees of prop down looked stupid. It also triggered obsessive compulsive tendencies. Bill
Posted on: 5/16/2013 5:50 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11513700

RE: Correcting incidence
[quote]ORIGINAL: mrshea very informative thread. I was just jigging my plane up to check incidences when the 3 star post appeared and now all the angles i am seeing makes sense. Thank you. Phil [/quote] I am curious about how the airplane is jigged? Do you jig the airplane once or each time it is checked? If once do you work on the saddle while it is jigged? Bill
Posted on: 5/15/2013 8:52 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11512243

RE: HOW-TO Make Fiberglass Cowlings using Balloons
Looks very similar to a Kougar cowl. BillS
Posted on: 12/31/2010 10:08 PM by Author "BillS" in the forum "Tips & Techniques"
http://www.rcuniverse.com/forum/fb.asp?m=10231025

RE: servo/boost tabs
that the flight loads were lower and servos were more responsive. BillS
Posted on: 12/27/2010 8:33 PM by Author "BillS" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10222054

RE: inverted two stroke help
are just easier to tune and keep running properly. But the mounting options are your choice. BillS
Posted on: 12/27/2010 8:12 PM by Author "BillS" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=10222030

RE: Blown Glow plugs need answers
Slightly lean or a floater in the fuel system, most often in the carb inlet has been the cause of most glow plug failures in my experience. Replacing more than two glow plugs per year is abnormal for me. Bill
Posted on: 4/21/2010 9:38 PM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9679283

RE: Sig Kougar Build
I also use the string method but mark the top of the canopy since I balance in a cradle. The Kougar flies well with a forward CG and slight up reflex in the ailerons and first flights are much safer. A little rear CG amplifies any bad traits. Stall and snap can be pronounded as the CG is moved back. Stall speed is high and I like to find out what speed stalls occur before moving the CG back. Good luck with the initial flights. Bill
Posted on: 4/20/2010 10:19 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9675075

RE: Sig Kougar Build
All my manuals state "1/2 back from the leading edge at the wing tip. Bet it will not fly long at 8" from the trailing edge which looks to be about 1" too far back. Bill
Posted on: 4/19/2010 11:37 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9672373

RE: Sig Kougar Build
Someday when all my Kougars are beyond repair an ARF substitute will be necessary. Has anyone found an ARF that flies like the Kougar? Bill
Posted on: 4/14/2010 12:20 PM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9660469

RE: Engine temperature ranges
No one seems to have temperature data but it probably is important. Likely it will be easier to generate your own data. Please share your findings. Bill
Posted on: 4/14/2010 12:15 PM by Author "BillS" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9660454

RE: Sig Kougar Build
For what it is worth: With standard gear a 11-diameter prop clips the grass on take off on landing. An 11� X 6 prop idols better on an OS 50 but I prefer to use a 10� X 8 prop even though landings are too fast. Don’t see how props larger than 11 “ diameter could be satisfactory. Bill
Posted on: 4/12/2010 9:26 AM by Author "BillS" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9654913

RE: New! On board fire extinguisher for jets
Below is the body of an email previously sent to a customer describing methods of operation. Hope it is helpful. Bill As discussed, Flame Out is activated by pilot control at the transmitter. 1. The most common turbine fires are wet starts on the flight line. The operator or pilot has immediate control, saving 20 to 30 seconds necessary to find and use a conventional fire extinguisher. 2. A second common problem is an airframe equipment or engine malfunction in the air. The pilot operates Flame Out in case of an air emergency. Flame Out will shutdown a full throttle turbine and cool the engine prior to the cornfield crash. Even if fuel tanks break on impact, a cool engine is not likely to ignite raw fuel. Best-case scenario is no fire. Worst-case scenario an extra 3 minutes to arrive at the crash scene with additional equipment. 3. Occasionally a visible fire is observed in the air that can be extinguished under pilot control. The flight controls are not set to fail-safe and often a relatively safe power off landing can be made in a confined area or runway. 4. Since Flame Out is servo activated, fail-safe can also be used. Impact or trigger on impact is an additional possibility. Flame Out will trip if seriously shocked or dropped hard.
Posted on: 10/14/2009 12:07 PM by Author "BillS" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9172586

RE: A123 for rx pack, regulator required?
[quote]I have one plane that uses 500 to600 mah's for 4 twelve minute flights and another that only uses 300 to 400 with the same amount of flight time. That's running 2 2300 packs in each plane. [/quote] After putting an amp meter on several servos in a few airplanes I was surprised at the difference in amp draw when a servo has binding that is not noticeable otherwise. Bill
Posted on: 8/22/2009 11:20 PM by Author "BillS" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=9036844

RE: TH 75 vibration problems ?
[quote]ORIGINAL: MOTORMAN37 [quote]ORIGINAL: BillS My TH 75 engine was very tight and I preheated it before starting it on the bench. I also relieved the cylinder to piston clearance before running the engine. Will do it again if an engine will not turn over to my satisfaction when cold. Long time mechanic and Mechanical Engineer. Bill [/quote] I understand the preheating you did, but why
Posted on: 8/22/2009 11:05 PM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9036815

RE: TH 75 vibration problems ?
My TH 75 engine was very tight and I preheated it before starting it on the bench. I also relieved the cylinder to piston clearance before running the engine. Will do it again if an engine will not turn over to my satisfaction when cold. Long time mechanic and Mechanical Engineer. Bill
Posted on: 8/21/2009 11:35 PM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9034878

RE: Pusher Muffler
Some of those flying Bob Cat’s are using the following method. Post # 3375 http://www.rcuniverse.com/forum/m_4588799/mpage_135/key_/tm.htm Bill
Posted on: 8/8/2009 10:26 PM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9000915

RE: Why No Choice of Receivers with 10cg???
I have an 8U radio but at least half the flying fleet or 20 or so are flying with only 4 channels. None are park fliers. There is a substantial difference in cost of 8 channel, 7 channel and 4 channel receivers. It also appears that some versions of 8-channel equipment are being discontinued. The marketing seems to obscure what works with what rather than explain. Maybe someday it will all become clear. Bill
Posted on: 8/1/2009 12:07 PM by Author "BillS" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=8981342

RE: cooling a pusher
[quote]ORIGINAL: James c harrell I need some ideas on cooling a pusher type engine. Had one and if it idled any length of time it would overheat. I thought of a bigger head like a heli head but are they available for most engines or are they different. Just don't know but I am sure someone out there has the answer [/quote] I have experienced the problem with a number of different engines on a Bob Cat. The lack of pusher prop sizes makes the problem bigger than it should be. Running a smaller pusher prop than tractor seems to help some. Using a larger engine than would normally be necessary seems to help some. Going to the end of the runway and crank and go seems to help, i.e. no taxi time and no run up. However the engine in pusher configuration often simply runs different in the air and I have not found a solution. Bill
Posted on: 7/29/2009 12:00 PM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8973651

RE: Muffler pressure - yes or no
[quote]ORIGINAL: hueyman How would you keep fuel from spilling out the tank vent if not attached to muffler pressure? [/quote] On the one engine I run without muffler pressure I put a “T� in the muffler line about 1� from the muffler. One side of the “T� is not connected to anything. Fuel does not leak from the open T. It looks like a normal setup and works well. I guess there could be a miniscule amount of pressure at high throttle. Bill
Posted on: 7/12/2009 12:36 AM by Author "BillS" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=8925607

RE: Header Tank / CG
[quote]ORIGINAL: captinjohn Sounds like maybe you fly pattern style....and I guess some up-lines can be long or several seconds.  I am kinda a guy that likes to fly smooth & all of a sudden throw in some mean snap rolls and spins.  I enjoy landing and go around if my last landing of the day does not look like a #10!!!!!   Capt,n<[/quote] I am a casual flyer who likes to experiment. However running out of fuel on the up line is undesirable. Header tank was only 1oz or 10% of total fuel. The purpose of the reversed main tank was to uncover the clunk so the fuel draw would be from a much shorter distance and the main tank could be further away without concern about starving the engine. Bill Slips. I know better.
Posted on: 6/8/2009 10:42 AM by Author "BillS" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8835089

RE: Nitro models pusher Bobcat?
From a design standpoint I have always thought the mains were too far back on the Bob Cat. Sitting on the wheels on the bench it takes a lot of weight on the stabilizer for the Bob Cat to rotate. I use fixed gear and moved the mains forward so I can’t give you a comparison weight. I located the mains about 2 1/2� behind the CG. I also fly Kougars and they stick like glue on landing. The Kougars are all set up with a negative AOA with mains 3� or so behind the CG. Bill
Posted on: 6/4/2009 10:36 AM by Author "BillS" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8824938

RE: Muffler pressure - yes or no
I have one engine that runs better without muffler pressure. Had a number of dead sticks on the first 20 or so flights in a different airplane. While running on the bench I noticed that pulling the pressure line while at 8,500 rpm resulted in cleaner running. The engine is an early 90’s two stroke. Thirty-five more flights have been made without muffler pressure and without any problem or dead stick. Bill
Posted on: 6/1/2009 11:39 PM by Author "BillS" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=8818397