RE: Building a full flying stab for my SU-27
Flying stabs are very common with sailplanes. On most, the "axle" rod and "actuator" rod both slide into a metal tubing or other materialed receiver which is epoxied into the stab itself. This allows the stabs to be easily removed for transport. A slight bend in the rod (friction) holds the stab on. Sometimes beeswax or other material is applied to the rod to "sticky" them up, and even set screws have been used. So long as your stab is aerodynamically balanced, the stab should be less likely to flutter. Also, don't deceive yourself and think this setup will not work for a powered plane also. Most full house thermal and slope sailplanes have very wide speed envelopes (a DS sailplane has set a speed record of over 300 MPH). Take a look at a sailplane setup too, before you commit to your design.
Posted on: 4/7/2006 10:52 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=4138294

RE: Great Planes Big Stik 40 ARF with AXI 4120/18
I have this plane with a GMS .47 glow engine which, according to the MFG produces 1.47 HP at 15,000 RPM. Never tached mine, but the plane flys fairly well. That said, if your setup can produce the equivalent power to the prop (1096 Watts) it will fly fine.
Posted on: 4/2/2006 8:44 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=4116377

RE: Defining speed
In case you are unfamiliar with Dynamic Soaring: http://en.wikipedia.org/wiki/Dynamic_soaring
Posted on: 12/29/2005 12:41 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=3705027

RE: Defining speed
Dave is correct. Airfoil and drag elimination have a lot more to with facilitating potential speed of an airframe than wing sweep, which main advantage is moving the compression wave off of the control surfaces during supersonic flight. Case in point, zero swept Dynamic Soaring sailplanes are now 300+ mph !
Posted on: 12/29/2005 12:34 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=3704998

RE: Few Questions on Sailplanes
Don't overlook these: http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAVR0&P=7 http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAVR0&P=7 The Spirit 100 is a TD, and is a good 1st time Sailplane ARF - The price is right too. The 2M Elite ARF might fit the bill better for both slope and TD at your site. I have one of these, and it can penetrate in some moderate wind. It has held up for more than 2 years on winch launches, and is fairly well made - for a $119 ARF. Another example with a wide speed envelope and really tough wing is the Enigma and Omega 2M from NE Sail. I paid under $175 for the Omega on sale a few years ago. See here for cureent specs / pricing: http://www.nesail.com/categories.php?subcatID=3&PHPSESSID=67d5eed9febd3e713f90dddbe13a59af
Posted on: 9/21/2005 8:34 PM by Author "BruceDana" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=3381291

RE: ? Car truck engine on a plane?????????????
Perhaps on an F5B/Hotliner or simillar pylon racer (like these: http://www.nesail.com/categories.php?subcatID=13&PHPSESSID=7512d847763399fbee16270970658411) ???
Posted on: 1/8/2005 9:29 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=2517716

RE: Thoughts on just how fast ???
Reduce drag wherever you can.
Posted on: 10/30/2004 8:31 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=2302703

RE: Who makes this thing ?
Where did you get the image - That might help with some clues???
Posted on: 9/30/2004 6:10 PM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=2215770

Fastest Hotliner / motor combo?
Anyone know the fastest Hotliner / motor combo? Thanks!
Posted on: 7/21/2004 7:56 PM by Author "BruceDana" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=2011457

RE: JETI Advance Controllers
Just a guess, but gun gas while firing? Engine (cordite) smoke at startup? a glow plug and mineral oil in a closed vessel and you have a smoke source.
Posted on: 4/8/2004 8:01 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1704373

RE: Really need help on brushless setup
You really need to read this: http://www.rcuniverse.com/forum/How_does_a_brushless_motor_work%3F/m_1558046/tm.htm
Posted on: 4/8/2004 7:26 PM by Author "BruceDana" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=1704266

RE: Hinged vs. All Moving Tail Surfaces
Many conventional tailed sailplanes have flying stabs, to achieve the the greatest up or downforce on the tail with the least deflection. deflection = drag. Full flying stabs are generally fulcrumed to be aerodynamically balanced, resulting in lower servo loads. The drawback is the mechanics in model arcraft to achieve the necessary precision. You must have a good axle and bearing to support the stab, and the internal mechanism to move it. Most commercial jets, and military jets (supersonic) are full flying stabs for their aerodynamic properties. Some R/C aircraft (other than sailplanes) have had full flying stabs. I suspect their popularity is not as much an issue with sport, pattern and 3D aircraft is: 1) extra strength needed for the varying shearing loads makes a conventional tail more attractive, 2) to achieve the strength needed in 1), the mechanics may be too heavy, and more complicated to install and maintain, and 3) drag is not nearly as much a concern in powered model flight, as it is for sailplanes.
Posted on: 3/5/2004 8:34 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1594995

RE: Bernoulli's equation
Here is some good reading if you are trying to understand what is going on: http://www.aa.washington.edu/faculty/eberhardt/lift.htm http://www.eskimo.com/~billb/wing/airfoil.html The debate is like religion, the other explanation is wrong because it is not belived by me...
Posted on: 2/17/2004 8:57 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1538467

RE: Engineering Group needing HELP!!!
If the wing is singular... This may be your only way to achive it: http://www.supaero.fr/page-perso/club/euroavia/eages/previews/8-xmas2.pdf Now do the math!
Posted on: 1/22/2004 9:43 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1457436

RE: Engineering Group needing HELP!!!
I took a "problem solving" class similar to what you have as engineering student at UF. Your problem statement does not eliminate the possibility of multiple 24" wings (biplane, triplane, etc.). Is the wing "singular" or not? BTW - our final exam "practical" was to remove a ping-pong ball from a 8' tall, 2" inside diameter PVC pipe standing upright (vertically) on the floor - without touching the ball or the tube. We were given 5 minutes to get it out, or fail. The reason I give you this is there may be a way out (you might be overlooking the obvious). Good LucK!
Posted on: 1/22/2004 9:37 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1457412

RE: 2 Blade VS. 3 Blade Prop
This link is a worthy read about propellers. Bolly knows a thing or two about props, and to quoute them: "Contrary to popular belief, multiple-blade propellers do not operate in severely disturbed air from the previous blade (when in forward flight). The reason multi blade propellers often appear inefficient is the need to use considerable lower diameter propellers (in comparison to 2 blades), for the same horsepower available. Diameter for diameter a well designed 4 blade prop will in some circumstances perform better than the equivalent 2 blade propeller. It is rare to find an efficient 3 or 4 blade propeller manufactured from nylon based materials. The reason for this is the most efficient shape (thin, narrow blades) for these propellers is difficult to produce in anything but a carbon or glass composite construction. " Source: http://www.bolly.com.au/book/Book.jsp?Chapter=2&Section=2
Posted on: 1/20/2004 7:47 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1450199

RE: Tallahassee soaring
There are several county parks that you could do HLG. One at the end of Pedrick Rd. One off off Miccosukee and I-10. Large open field with parking. The one of Pedrick is 2 miles (as the crow flies) from the closest point of the SRCC airfield.
Posted on: 11/21/2003 9:22 PM by Author "BruceDana" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=1296336

RE: Homemade Smoke Liquid/Oil-How to?
what about straight diesel? Getting it hot enough to smoke will be the challenge.
Posted on: 11/21/2003 8:59 PM by Author "BruceDana" in the forum "Events, Shows and Fun Fly's - Airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=1296283

RE: large electrics
liversalts This plane is using the 90" cub wing from a Great Planes kit. The following is from Motorcalc (I hope it is reasonable): MotOpinion - Cubster 14x10 100ft above Sea Level, 30.00inHg, 70°F (Florida) Motor: Model Motors AXI AC4120/14; 650rpm/V; 2A no-load; 0.041 Ohms Battery: Sanyo CP-2400SCR; 14 cells; 2300mAh @ 1.2V; 0.0053 Ohms/cell Speed Control: Castle Creations Phoenix 80; 0.001 Ohms; High rate Drive System: APC 14x8 Electric; 14x8 (Pconst=1.08; Tconst=1) direct drive Airframe: Cubster - Camera Plane; 1132sq.in; 162.1oz; 20.6oz/sq.ft; Cd=0.081; Cl=0.72; Clopt=0.83; Clmax=1.47 Stats: 58 W/lb in; 44 W/lb out; 19mph stall; 26mph opt @ 57% (16:56, 102°F); 28mph level @ 60% (15:27, 104°F); 713ft/min @ 18.2°; -249ft/min @ -6.3° Power System Notes: The full-throttle motor current at the best lift-to-drag ratio airspeed (41.8A) falls between the motor's maximum efficiency current (21.4A) and its current at theoretical maximum output (115.7A), thus making effective use of the motor. The voltage (13.6V) exceeds 12V. Be sure the speed control is rated for at least the number of cells specified above. Aerodynamic Notes: The static pitch speed (54mph) is within the range of approximately 2.5 to 3 times the model's stall speed (19mph), which is considered ideal for good performance. With a wing loading of 20.6oz/sq.ft, a model of this size will have trainer-like flying characteristics. It would make an ideal trainer, for use in calm to light wind conditions. The static thrust (91.5oz) to weight (162.1oz) ratio is 0.56:1, which will result in short take-off runs, and no difficulty taking off from grass surfaces (assuming sufficiently large wheels). At the best lift-to-drag ratio airspeed, the excess-thrust (51.4oz) to weight (162.1oz) ratio is 0.32:1, which will give strong climbs and rapid acceleration. This model will most likely readily loop from level flight, and have sufficient in-flight thrust for many aerobatic maneuvers. General Notes: This analysis is based on calculations that take motor heating effects into account. Motor Model Motors AXI AC4120/14 Motor Constant (rpm/V) 650 No Load Current (A) 2 Armature Resistance (Ohms) 0.041 Battery Sanyo CP-2400SCR Series Cell Count 14 Parallel Cell Count 1 Cell Capacity (mAh) 2300 Pack Capacity (mAh) 2300 Cell Voltage (V) 1.2 Pack Voltage (V) 16.8 Cell Resistance (Ohms) 0.0053 Pack Resistance (Ohms) 0.0742 Speed Control (ESC) Castle Creations Phoenix 80 Resistance (Ohms) 0.001 Maximum Current (A) 80 Number of ESCs 1 Drive System APC 14x8 Electric Gear Ratio 1.00:1 Propeller (in x in) 14x8 Series Motors 1 Parallel Motors 1 Number of Propellers 1 Blades per Propeller 2 Airframe Cubster - Camera Plane Wing Span (in) 90 Wing Area (sq.in) 1132 Total Weight (oz) 162.1 Static Predictions Current (A) 43.2 Motor Voltage (V) 13.6 Input Power (W) 585.1 Input Power Loading (W/lb) 57.7 Power Loss (W) 134.7 Motor/Gearbox Output (W) 450.3 Output Power Loading (W/lb) 44.5 Motor/Gearbox Efficiency (%) 77.0 Shaft Efficiency (%) 62.1 Motor RPM 7111 Propeller RPM 7111 Static Thrust (oz) 91.5 Pitch Speed (mph) 53.9 Run Time (min:sec) 3:12 Flight Predictions Stall Speed (mph) 19 Optimal Flight Speed (mph) 26 Throttle for Optimal (%) 57 Duration at Optimal (m:s) 16:56 Motor Temp at Optimal (°F) 102 Hands-off Speed (mph) 28 Throttle for Hands-off (%) 60 Duration Hands-off (m:s) 15:27 Motor Temp Hands-off (°F) 104 Best Rate of Climb (ft/min) 713 Rate of Sink (ft/min) -249
Posted on: 10/1/2003 8:13 PM by Author "BruceDana" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=1174950

RE: giant scale
See this power setup for the electric Monocoup (a 10 pound plane). http://www.hobby-lobby.com/monocoupe.htm
Posted on: 9/28/2003 8:41 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1167977

RE: .46 to electric
Another try??? MotoWizard Results - Eectric Goldberg Cub Desired Full-throttle Performance: Trainer Minimum Partial-throttle Flying Time: 13 minutes Number of Motors: 1 Wing Span: 76 in Wing Area: 744 sq.in Empty Weight: 88 oz Airfoil: Thick Semi Symmetrical Elevation: 300 ft Sea-level Pressure: 29.00 inHg Air Temperature: 60°F Drive System Types: Direct Drive Only Motor Types: Brushless Only Manufacturer: Any Manufacturer Maximum Number of Cells: 14 NiCd/NiMH or 5 LiPoly Cell Types: NiCd or NiMH Only Motor Battery Gear Prop Rating Aveox V12 9x3000SCR 14x12 1.000 Kontronik Tango 45-08 (20V) 9x3000SCR 12x8 0.998 Kontronik Tango 45-10 (20V) 9x3000SCR 10x6 0.994 Mega AC 22/45/3 9x3000SCR 12x9 0.982 Kontronik Tango 45-08 (20V) 8x3000SCR 12x9 0.975 Hacker B50 16XL 8x3000SCR 11x7 0.972 Plettenberg HP 300/20/A3 S 10x3000SCR 10x5.5 0.969 Hacker B50 18XL 8x3000SCR 11x8 0.968 Aveox V12 8x3000SCR 15x14 0.967 Kontronik Tango 45-06 (20V) 9x3000SCR 13x11 0.963 Mega AC 22/45/3 8x3000SCR 13x10 0.959 Hacker B50 17XL 8x3000SCR 11x8 0.956 Plettenberg HP 300/20/A3 S 9x3000SCR 10x6 0.956 Kontronik Fun 600-11 (24V) 9x3000SCR 10x5.5 0.955 Kontronik Fun 600-11 (12V) 9x3000SCR 10x5.5 0.955 Plettenberg HP 355/15/B18 P10 Orbt 15/18 11x3000SCR 10x5 0.954 Mega AC 22/30/4 10x3000SCR 10x6 0.953 Hacker B50 19XL 8x3000SCR 12x9 0.951 Kontronik Tango 45-08 (20V) 7x3000SCR 12x10 0.951 Hacker B50 21L 9x3000SCR 10x5.5 0.950 Graupner Ultra Brushless 300/30-2 #6384 9x3000SCR 11x7 0.948 Aveox 27/39/3 11x3000SCR 10x5.5 0.945 Hacker B50 22L 9x3000SCR 10x6 0.940 Kontronik Tango 45-06 (20V) 8x3000SCR 14x12 0.940 Plettenberg HP 355/15/B18 P10 Orbt 15/18 10x3000SCR 10x5.5 0.939 Hacker B50 21XL 8x3000SCR 13x10 0.938 Aveox 1412/3Y Neodym 9x3000SCR 11x7 0.933 Actro 24-4 8x3000SCR 14x13 0.933 Aveox 1015/3Y 11x3000SCR 9x5 0.931 Hacker B50 20XL 8x3000SCR 12x10 0.929 Aveox 27/39/3 10x3000SCR 10x6 0.927 Aveox 1412/4Y Sport 40 9x3000SCR 13x10 0.927 Mega AC 22/30/4 9x3000SCR 11x7 0.924 Plettenberg HP 355/15/B18 P10 Orbt 15/18 9x3000SCR 10x6 0.923 Hacker B50 24L 9x3000SCR 11x7 0.920 Hacker B50 22XL 8x3000SCR 13x11 0.919 Plettenberg HP 370/30/A2 SL 8x3000SCR 14x13 0.919 Hacker B50 25L 9x3000SCR 11x7 0.918 Actro 12-5 10x3000SCR 11x7 0.915 Aveox 1015/3Y 10x3000SCR 10x5.5 0.913 Model Motors AXI AC4120/14 8x3000SCR 13x12 0.911 Hacker B50 23XL 8x3000SCR 13x12 0.908 Plettenberg HP 355/10/B22 P10 Orbt 10/22 11x3000SCR 9x5 0.902 Model Motors AXI AC2820/10 11x3000SCR 9x5 0.899 Aveox 27/39/3 9x3000SCR 11x7 0.897 Hacker B50 26L 9x3000SCR 11x8 0.896 Kontronik Tango 45-05 (20V) 9x3000SCR 15x15 0.896 Aveox 1409/4Y 9x3000SCR 11x7 0.896 Aveox 1015/3Y 9x3000SCR 10x6 0.893 Actro 12-5 9x3000SCR 11x8 0.889 Hacker B50 24XL 8x3000SCR 14x13 0.887 Model Motors AXI AC2820/10 10x3000SCR 10x5.5 0.885 Graupner Ultra Brushless 300/30-3 #6385 9x3000SCR 14x13 0.882 Actro 12-6 10x3000SCR 12x10 0.850 Plettenberg HP 370/20/A3 10x3000SCR 14x14 0.835 Generated by MotoCalc 7.03, 9/19/2003 3:00 PM.
Posted on: 9/19/2003 3:04 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1148038

RE: .46 to electric
No particular reason...Just plugging numbers into the BLACK BOX to see what it spit out. Note the INPUT = "Desired Full-throttle Performance: Sport Minimum Partial-throttle Flying Time: 9 minutes "
Posted on: 9/19/2003 2:58 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1148030

RE: .46 to electric
Here is what MotorCalc says: MotoWizard Results - Electric Cub Desired Full-throttle Performance: Sport Minimum Partial-throttle Flying Time: 9 minutes Number of Motors: 1 Wing Span: 76 in Wing Area: 744 sq.in Empty Weight: 80 oz Airfoil: Thick Semi Symmetrical Elevation: 300 ft Sea-level Pressure: 30.00 inHg Air Temperature: 60°F Drive System Types: Direct Drive or Geared Motor Types: Brushless Only Manufacturer: Any Manufacturer Maximum Number of Cells: 8 NiCd/NiMH or 3 LiPoly Cell Types: NiCd or NiMH Only Motor Battery Gear Prop Rating Hacker B50 11L 8x2400SCR 5:1 17x15 1.000 Hacker B50 10XL 8x2400SCR 3.5:1 17x15 0.997 Hacker B50 12L 8x2400SCR 4.5:1 17x15 0.993 Hacker B50 11XL 8x2400SCR 3:1 16x14 0.991 Kontronik Fun 600-18 (12V) 8x2400SCR 4:1 17x15 0.990 Plettenberg HP 220/40/A2 S P4 Car E-Maxx 8x2400SCR 4.5:1 16x14 0.988 Kontronik Fun 480-33 (12V) 8x2400SCR 6:1 15x12 0.986 Hacker B40 11L 8x2400SCR 6:1 17x15 0.985 Aveox 27/39/1.5 8x2400SCR 4.5:1 17x15 0.984 Hacker B40 9L 8x2400SCR 6:1 15x12 0.983 Hacker B50 12XL 8x2400SCR 3:1 17x16 0.982 Hacker B50 14S 8x2400SCR 6:1 17x16 0.982 Hacker B50 14L 8x2400SCR 4:1 17x16 0.982 Hacker B40 10L 8x2400SCR 5:1 15x11 0.981 Hacker B50 13L 8x2400SCR 4:1 17x15 0.980 Kontronik Fun 480-28 (12V) 8x2400SCR 6:1 17x15 0.980 Hacker B50 15S 8x2400SCR 5:1 16x14 0.979 Hacker B50 13S 8x2400SCR 6:1 17x15 0.977 Kontronik Tango 45-10 (20V) 8x2400SCR 2:1 16x13 0.975 Aveox 1015/1.5Y 8x2400SCR 4.5:1 16x13 0.974 Hacker B50 15L 8x2400SCR 3.5:1 17x15 0.974 Hacker B50 9XL 7x2400SCR 3.5:1 16x15 0.973 Hacker B40 10S 8x2400SCR 6:1 13x9 0.973 Kontronik Fun 500-27 (12V) 8x2400SCR 6:1 17x15 0.971 Kontronik BL480-33 (7V) 8x2400SCR 6:1 15x12 0.970 Hacker B50 13XL 8x2400SCR 2.5:1 16x15 0.966 Hacker B40 12L 8x2400SCR 5:1 16x14 0.964 Hacker B50 16S 8x2400SCR 4.5:1 16x14 0.963 Hacker B50 14XL 8x2400SCR 2.5:1 17x16 0.963 Kontronik KBM 42-30 8x2400SCR 5:1 15x11 0.963 Kontronik BL400-40 (7V) 8x2400SCR 6:1 14x10 0.962 Kontronik Fun 400-42 (6V) 8x2400SCR 6:1 14x10 0.961 Aveox 27/26/2 8x2400SCR 5:1 17x15 0.961 Hacker B40 11S 8x2400SCR 6:1 14x11 0.959 Hacker B50 12S 7x2400SCR 6:1 16x15 0.959 Kontronik Fun 500-21 (12V) 8x2400SCR 5:1 17x17 0.959 Hacker B50 16L 8x2400SCR 3:1 16x14 0.958 Hacker B50 17S 8x2400SCR 4.5:1 17x15 0.958 Hacker B40 12S 8x2400SCR 6:1 15x12 0.957 Kontronik BL600-17 (12V) 8x2400SCR 3.5:1 16x15 0.957 Aveox 27/39/2 8x2400SCR 3.5:1 17x16 0.956 Hacker B40 13S 8x2400SCR 6:1 16x13 0.956 Kontronik BL400-36 (7V) 8x2400SCR 6:1 15x12 0.956 Hacker B40 14S 8x2400SCR 6:1 16x14 0.954 Kontronik Fun 400-36 (12V) 8x2400SCR 6:1 15x12 0.954 Aveox 1010/DF 8x2400SCR 6:1 16x13 0.952 Aveox Marine 12 8x2400SCR 4.5:1 17x16 0.952 Hacker B50 18S 8x2400SCR 4.5:1 17x16 0.952 Plettenberg HP 370/20/A2 S 8x2400SCR 2:1 16x14 0.951 Aveox 27/26/1.5 7x2400SCR 6:1 16x15 0.951 Hacker B40 13L 8x2400SCR 4.5:1 16x14 0.951 Aveox 1010/2Y 8x2400SCR 4.5:1 15x12 0.951 Kontronik KBM 67-11 8x2400SCR 2.5:1 17x16 0.950 MaxCim MaxNEO-13D 8x2400SCR 4.5:1 16x13 0.949 Aveox 1415/2Y 8x2400SCR 2.5:1 16x15 0.948 Kontronik Fun 600-15 (24V) 8x2400SCR 3:1 17x15 0.948 Kontronik Fun 600-15 (12V) 8x2400SCR 3:1 17x15 0.948 Kontronik BL500-20 (12V) 8x2400SCR 4.5:1 17x16 0.946 Aveox 1409/2Y 8x2400SCR 4.5:1 17x16 0.946 Kontronik KBM 42-24 (est) 8x2400SCR 5:1 17x15 0.945 Aveox 1015/2Y 8x2400SCR 3.5:1 17x15 0.945 Hacker B50 15XL 8x2400SCR 2:1 16x14 0.944 Mega AC 22/20/3 8x2400SCR 4.5:1 17x15 0.944 Kontronik Fun 400-42 (12V) 8x2400SCR 6:1 14x10 0.941 Hacker B50 17L 8x2400SCR 3:1 17x16 0.939 Hacker B50 16XL 8x2400SCR 2:1 16x15 0.939 Kontronik BL400-36 (12V) 8x2400SCR 6:1 15x12 0.938 Mega AC 22/45/2 8x2400SCR 3:1 17x16 0.937 MaxCim MaxN32-13D 8x2400SCR 5:1 16x14 0.935 Mega AC 22/30/3 8x2400SCR 3:1 17x17 0.933 Hacker B40 15S 8x2400SCR 6:1 17x16 0.933 Hacker B50 19S 8x2400SCR 4:1 17x16 0.933 Hacker B50 18L 8x2400SCR 3:1 17x17 0.932 Hacker B40 14L 8x2400SCR 4.5:1 17x16 0.928 Hacker B50 20S 8x2400SCR 4:1 17x17 0.927 MaxCim Max15-13D 8x2400SCR 5:1 16x14 0.926 Flyware LRK 350/10-ARF-10.5W 10-pole 8x2400SCR 5:1 16x14 0.924 Mega ACn 16-15-3 8x2400SCR 6:1 16x15 0.924 Jeti Phasor 15-3 8x2400SCR 4.5:1 16x14 0.924 Plettenberg HP 220/20/A3 P4 8x2400SCR 6:1 17x17 0.920 Hacker B50 19L 8x2400SCR 2.5:1 16x15 0.917 Plettenberg HP 300/20/A3 S 8x2400SCR 2:1 16x14 0.911 Hacker B50 20L 8x2400SCR 2.5:1 17x16 0.908 Kontronik BL400-29 (7V) 8x2400SCR 6:1 17x16 0.908 Hacker B50 21S 8x2400SCR 3.5:1 17x16 0.907 Aveox 1406/3Y 8x2400SCR 4.5:1 17x17 0.906 Graupner Ultra Brushless 220/20-3 #6381 8x2400SCR 3:1 16x14 0.904 Hacker B40 15L 8x2400SCR 4:1 17x16 0.901 Hacker B40 16S 8x2400SCR 4.5:1 15x13 0.901 Mega AC 22/10/4 8x2400SCR 6:1 16x15 0.896 Kontronik Fun 400-28 (12V) 8x2400SCR 6:1 17x17 0.895 Hacker B50 22S 8x2400SCR 3.5:1 17x17 0.894 Kontronik BL400-29 (12V) 8x2400SCR 6:1 17x16 0.891 Hacker B40 17S 8x2400SCR 5:1 17x16 0.886 Generated by MotoCalc 7.03, 9/18/2003 8:32 PM.
Posted on: 9/18/2003 8:37 PM by Author "BruceDana" in the forum "Glow to Electric Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1146366

RE: large electrics
Building a slow flying camera plane to take aerial pictures. Here is what I have so far? Plane Specs: 90" Span 1123 square inches (a Cub wing) 10 pounds flying weight (or less, estimated) intended for slow flying camera plane (basic trainer performance envelope), no aerobatics. Motor: option 1: AXI 4120-14 external rotor brushless motor option 2: AXI 4120-18 external rotor brushless motor Controller: JEC703OP Jeti 70-3P Opto Controller Battery Option 1: 14 cells - 2 x 7 Cell CP-2400SCR NiCad pack (Sanyo) Battery Option 2: 16 cells - 16 Cell 3000 mAh NiMh (Sanyo) All options above have already been purchased (plus spare batteries and chargers $$$). I would like to use Option 1: motor + Option 1: battery - together on this plane. I would like to build a 2nd plane for the Option 2: motor + battery, but could combine in different arrangements to suit flight regime: Take off, fly no higher than 500 AGL, and have about 10 minute flight times. I hope to fly at 1/2 throttle or less to maintain altitude for photography. Is this setup going to work? or do I go back to the drawing board (and credit card)? Thanks!
Posted on: 9/10/2003 9:35 PM by Author "BruceDana" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=1127324

Missing airplane
Some hope, If the plane went down in the "Tate's Hell" you describe, it likely broke up. So unless the "theif" got ALL the debris, and you found the exact spot it went in, it's potentially still out there. Don't give up looking yet. And the idea about the reward might recruit a few to assist in the search. Good luck and hope you get it back soon!
Posted on: 8/17/2003 11:48 PM by Author "BruceDana" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=1063461

motor for GP electricub
Have you thought about some the external rotor motors. [url]http://www.hobby-lobby.com/brushless_axi.htm[/url]
Posted on: 8/16/2003 1:04 AM by Author "BruceDana" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=1058314

How much positive incedence to use?
I don't have a sketch, but can describe what I'm doing. The front of the fuse will be opened for the camera to shoot through. Will look kind of like a fish with it's mouth open. I'll try to remember to post a construction pic once I'm further along. The nose will have an opening to allow for full-forward shooting, tilting down for vertical and everthing in between. This protects the equipment somewhat from minor mishap, cleans up the airframe a little too. Fuse length is 60", height 6", width 4". Using an 80" cub wing. Tail dragger setup. A very "Stik" like fuse. The forward 24" of the fuse will contain all the gear, the top of the fuse sectionalized into hatches for easy access. Power will be electric motor mounted on a pod made of sheet aluminum (AXI 4120-14 motor, JES 70-3P Opto controller, 14 2400S cells). This should provide somewhere between 700 and 900 watts to the prop (14 x 7). This setup easily flies a 10 lb Monocoup (see the Hobby-Lobby website and video at: [url]http://www.hobby-lobby.com/monocoupe.htm[/url]) Also, I need to be able to shut off motor in-air [to minimize vibration] and electric for noise sensitive areas I chose a tractor setup to run from a pod, to clear the prop from the camera lens. The pod will be an A-frame made of aluminum, attached to the fuse sides just in fron the wing by bolts and wingnuts for easy removal and adjustment of thrust line (If camera equipment changes between flights) The camera intially will be driven by 3 channels, Tilt, Zoom, Shoot. Also planning for mode switching between still frame / video. I already have on-ground video capability using X-10 transmitter from the NTSC output from these cameras. This is how I presently "frame" the shots using PAP & KAP (see the website [url]http://www.bird-shots.com[/url]) The specs for the camera can be found at: [url]http://www.dpreview.com/reviews/specs/Olympus/oly_c5050z.asp[/url] I also have this as camera which which is an alternative: [url]http://www.dpreview.com/reviews/specs/Pentax/pentax_optios.asp[/url] I havent purchased a digital video camera yet, but will configure the camera gymbal in the plane for that option too. I do not plan to use downliked video for anything but aiming the flight cameras. I hope this helps!
Posted on: 8/13/2003 9:48 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1046730

How much positive incedence to use?
I'm building a purpose-built camera plane (for pro-sumer 5 megapixel digital camera in the nose on a gimbal for tilt / pan / zoom). I have an 80" cub wing. What incidence should I set the wing relative to the flight path (if tailplane is at zero degrees)? I'm guessing, but I was planning on 3 to 5 degrees? Does this seem reasonable? Thanks!!!
Posted on: 8/11/2003 9:49 PM by Author "BruceDana" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=1046727

Heavy lifting Camera plane?
I'm looking for suggestions for a plane capable of lifting a pro-sumer digital camera (Olympus C-5050Z - 16.9 oz) plus transmitter gear (used only to transmit NTSC-out signal from camera to ground to aim the camera for still shots and on-board video). I'm already using my own gimbal design and this camera/tranmitter setup to shoot Pole Aerial Photography (PAP), but have a few clients who want some heigher shots and "as the ball flies" video of thier golf courses. I have an 80" Cub wing and propulsion (AXI 4120-14 brushless motor, JES 70-3P Opto controller, 14 x 2700S cells) and am considering building a Frankenstein using the Cub wing to fly it (camera mounted on gimbal in nose of plane for unobstructed, high resolution pics and video). Are there ARFs out there that would make a good camera plane (don't want to shoot through prop arc or have the plane in the frame)? I've looked at some heli setup's, but I'm not a Heli pilot and don't want to make that investment (vibration isolation is an absolute must) Suggestions?
Posted on: 8/9/2003 5:05 PM by Author "BruceDana" in the forum "Aerial Photography and Video"
http://www.rcuniverse.com/forum/fb.asp?m=1039605

Not a prop plane but...
Seen this? [url]http://www.rcuniverse.com/showthread.php?s=&threadid=803213&forumid=59[/url] Could the same technique be used to drive prop planes past 200??
Posted on: 5/27/2003 12:43 AM by Author "BruceDana" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=806364