Propping for efficiency
Duplicate
Posted on: 7/13/2012 9:58 PM by Author "big_G" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11154555

Prop sizing for efficiency
Background....Converted nitro Cermark Javelin. Full throttle performance is very good for pattern flying. AUW 6 lbs. Motor is Leadershobby 9394001223655. 4s lipo 3800 ma/40C. Flight times 3 to 3.5 minutes. Lipo very warm after flight. Static amps are 82 at full throttle. (About 1100 watts). Running the recommended (motor mfr) 13/10 prop. If my tach. is correct 5,200 static rpm. My gut tells me too much prop. The full throttle amps should drop when flying...how much?. I do not want to exceed 60 amps flying. My esc does not log data. Fire away!.......
Posted on: 7/13/2012 9:04 PM by Author "big_G" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11154533

RE: Has the extreme Heat stopped your flying
I didn't fly all last summer...hottest on record. This summer not as bad, but I want to fly. White t-shirt, shade trees and lots of ice water. We gotta do what we gotta do. Hide from the sun when you are not flying.
Posted on: 7/7/2012 7:58 AM by Author "big_G" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11146403

RE: *** Ultra Sport Brotherhood ***
My US 40..hot OS on a pipe and retracts was shredded thru a tree a couple of years ago. I had over 400 flights and 15 years on her. Count me in, as I will build a 40 or 60 size next.
Posted on: 6/23/2012 12:26 PM by Author "big_G" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11128907

O.S. 46
I have a 46 rear exhaust, pumped with type 46 carb......"V" engine. I need a longer header pipe for the tuned pipe. The one I have is 1.25 inch offset. I need about 3 or 3.25 inch offset...any ideas? thanks, Big_G
Posted on: 7/10/2005 9:51 PM by Author "big_G" in the forum "O.S. Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3154444

RE: Great Planes Tiporare – Thirteen Year Build
IC...lol[sm=lol.gif]
Posted on: 7/9/2005 5:46 PM by Author "big_G" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3151273

RE: Tape your crystal in!
[b][/b]The sky is falling...The sky is falling.......
Posted on: 7/8/2005 9:48 PM by Author "big_G" in the forum "Giant Scale Aircraft - 3D & Aerobatic"
http://www.rcuniverse.com/forum/fb.asp?m=3149415

RE: Great Planes Tiporare – Thirteen Year Build
Geez, cut the boy some slack......It took me 19 years to finish my Career 60...lol (but I was out of the hobby for 15 years) Big_G
Posted on: 7/8/2005 1:22 PM by Author "big_G" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3148122

RE: Epoxy Not Setting?
Uh Oh! Didn't you mix an EQUAL quantity of "Part A" with "Part B"?... you must use both at the same time....
Posted on: 7/6/2005 1:35 PM by Author "big_G" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=3141415

RE: NexSTAR 46 .... Exhaust question
Make sure the high speed fuel mixture is not too rich.....Running too rich will be messy...lol
Posted on: 7/6/2005 1:28 PM by Author "big_G" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=3141398

RE: Servo setup for Springair Retracts.
Very little effort is needed to switch the valve...any small servo should work fine Big_G
Posted on: 7/5/2005 9:44 PM by Author "big_G" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=3139487

RE: Seagull Models Laser 200 Wing Loading
Dick, I take your words on the Green Models Laser suggest that it is not very acrobatic or has bad tendencies to snap, etc.? Many moons ago I built a IM Laser200, it flew "ok", snapped like a Cap...lol Big_G
Posted on: 6/30/2005 4:09 PM by Author "big_G" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=3125541

RE: Just got my Javelin II
, it will have a cline pump, digital servos and 1100ma. battery. Big_G
Posted on: 6/28/2005 9:22 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3119480

RE: Just got my Javelin II
Well, my 1st. Javelin is ready to go, I am pleased with the design. What amazes me the most is it is the same size as my Carreer 60 (fiberlgass Curare clone), but 2 pounds lighter!. (Flying weight 5.75 lb.). The supplied engine is fine, but I think I will replace the house brand servos. They are noisy and have some slop internal. Flight report this weekend. big_G
Posted on: 6/28/2005 5:24 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3118695

RE: AUSTIN TX AREA BUILDER NEEDED
Hell, it takes me 2 weeks to build a BARF...lol
Posted on: 6/28/2005 4:28 PM by Author "big_G" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=3118510

RE: Fuel pumps
10 ounces of fuel right behind the engine WILL change the c.g. on a light aircraft....try slow rolls with a full tank and then an almost empty one...I see a difference.
Posted on: 6/27/2005 12:49 PM by Author "big_G" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=3114076

Fuel pumps
In one of my Javelins, I want to mount the fuel tank over the c.g..I will use an OS 46ax....will I need a pump, if yes, what type or brand will work best?...thanks in advance....big_G
Posted on: 6/27/2005 12:20 PM by Author "big_G" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=3113969

RE: receiver problems?
Geez....FWIW, 600 ma. pack on non-digital servos is no problem ....generally, servos draw little current if not in action. I have been flying 4 flights without charging with 500ma. packs for more than 20 years with never a battery failure. That beign said, 1000ma. packs are so cheap today, it's a no-brainer...lol...don't fly if the loaded voltage falls below 4.8volts[b][/b]...big_G
Posted on: 6/24/2005 12:30 PM by Author "big_G" in the forum "Crash & Rebuild"
http://www.rcuniverse.com/forum/fb.asp?m=3104987

RE: Pattern Props
Ok, tyvm....Big_G
Posted on: 6/23/2005 11:36 AM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3101062

RE: Just got my Javelin II
I got my Javelins this week, one with the enhanced package (engine and 5 servos installed). The quality is very good, although I am wondering about the wing joint. Appears to be about a 1 inch glass cloth reinforcement. I usually do at least 4 inches on built up wings...we shall see. If the engine performs well, and the servos are good, we may have a keeper...lol. I will put my OS46AX and digital servos in the base model.....wonder which one will fly better?......lol
Posted on: 6/23/2005 11:33 AM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3101054

RE: Pattern Props
Jock, how is the vertical performance...like in square loops or verticle 8's?...my Javelin arrives this week... [:D]
Posted on: 6/20/2005 4:32 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3092051

Pattern Props
Using an O.S. 46AX in a 5 to 6 lb. pattern ship, such as Javilin 40 or Goldberg Matrix 40 3D, I'm thinking APC 11-5 or 12-4....agree or disagree? I want maximum vertical performance, not speed... Big_G "Too much is never enough"
Posted on: 6/20/2005 4:14 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3091987

RE: Icepoint Wing Failure
LOL....don't hold your breath on that one, Paternguy................
Posted on: 6/8/2005 12:03 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3054033

RE: Javelin and GMS 47
I just crashed my 20 year old Ultra Sport yesterday....damn tree jumped out in front of it...lol...now I have the Javelin coming...with engine and servos..I'll let you all know how it goes....
Posted on: 6/6/2005 12:01 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3047269

RE: I just can't believe it !
I have a Corvette restoration business... cars that sold for $4,000 to $5,000 in the 60's are selling for $150,000 up . Originality costs! A 30-35 year old kit N.I.B. for $500+ sounds like pure capitalisim at work...supply and demand...nothing more than that....
Posted on: 6/6/2005 11:43 AM by Author "big_G" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=3047215

RE: Classic Pattern
OK, I'll be the first to do a 100mph loop, 300 ft diameter.....he he he
Posted on: 6/5/2005 8:19 PM by Author "big_G" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3045081

RE: What Classic Are You Flying?
Here is my Carrear 60, I believe. I bought it new in '86, Put 7th and 8th flights on her today...needs trimming..lol
Posted on: 6/5/2005 8:13 PM by Author "big_G" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3045065

RE: Classic pattern equipment ("Classic Pattern" RCU Forum)
Bravo, well-said, right-on, etc......
Posted on: 6/1/2005 1:07 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3032339

RE: 2m entry level
Thanks for the comments. So many choices, so little money...lol...I think the Wild Hare 1.20 edge with a ST2300 sounds good...any opinions?
Posted on: 5/31/2005 10:16 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3030594

RE: Classic pattern equipment
I'll second that motion!
Posted on: 5/29/2005 2:40 PM by Author "big_G" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=3022390