RE: *Checking Batteries Between Flights*
Ni-Cd's have a long stable current discharge rate before they fall off the cliff. This voltage level settles at approx 1.2v for a long time. At 1.4v the Ni-Cd is fully charged, at 1.1v it is nearly discharged. So, on a 4 cell pack, once the battery voltage under a typical load reaches less then 4.8v, the battery is close to being fully disharged. To be extra safe, you can plot the voltage/time and know exactly how long you can run your battery at a given current disharge level. But plenty of people have done this and you can take their word that once the battery settles below 1.2v per cell, the end is approaching rapidly. 4.8v is a pretty safe Go/No Go reading for your typical 10-12 min flight.
Posted on: 12/20/2007 4:59 PM by Author "warhwk" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=6783464

RE: Flew my NEW Pizazz today.
TimC has the correct CG as listed in the manual. But from my experience (and others), it flew much better with a CG at 4.0" or greater. I settled on 4.25", and heard a few people running in the 5.0" range. If it won't flat-spin inverted, the CG is too far foreward.
Posted on: 11/4/2007 1:23 AM by Author "warhwk" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=6577997

RE: low vs mid wing?
You won't see much difference in flying characteristics. Wing shape, dihedral, control surface deflection etc, plays a larger role than where the wing is mounted.
Posted on: 10/4/2007 5:35 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6447947

RE: Brillelli 46 Pitts-style Muffler?
You may get a faster response by posting to the Brillelli 46 thread. http://www.rcuniverse.com/forum/m_4587158/mpage_59/key_/tm.htm
Posted on: 9/7/2007 2:41 AM by Author "warhwk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=6337726

RE: Thrust, power, and RPM's?
Here is a bit more info on your engine. http://www.rcuniverse.com/forum/m_42665/tm.htm It looks like a 12-4 is probably your best prop. However, I would replace the Master Airscrew with wood or an APC. The MS props are loaded pretty lightly for their pitch.
Posted on: 9/5/2007 11:34 PM by Author "warhwk" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=6333390

RE: Thrust, power, and RPM's?
"Power" is not definable unless you have a dyno. Generally larger diameter/Low pitched props that have the same load factor will pull harder but at the cost of reduced airspeed. The mathematical formula for thrust is: Thrust = 2.83E-12 x RPM^2 x D^4 What is the pitch on your 13" prop. Someone can then calculate approximate thrust and speed calculations. For example...ThrustHP puts out these speed figures: Prop Selector from http://www.gylesaero.com/_frames/f_propcalc.shtml]Gyles AeroDesign Propeller Calculator puts out the thrust measurements: 12-4 @ 12,000rpm = 45.46 MPH and 6.1 lbs of static thrust 13-4 @ 12,000rpm = 45.46 MPH and 8.03 lbs of static thrust 13-4 @ 7500rpm = 28.41 MPH and 3.14 lbs of static thrust 13-6 @ 7500rpm = 42.61 MPH and 4.02 lbs of static thrust 13-8 @ 7500rpm = 56.82 MPH and 4.87 lbs of static thrust Actual Prop brand and type will change these figures substantially.
Posted on: 9/5/2007 10:57 PM by Author "warhwk" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=6333218

RE: How do you explain to your kids they can't fly your heli?
[quote]ORIGINAL: helimedic LOL...with my luck he'd be better than me at it. [/quote] My 9yr old flew my CX just fine after a few sim sessions. It won't be long before he's showing me up. [:D]
Posted on: 9/4/2007 10:00 PM by Author "warhwk" in the forum "RC Helicopter General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=6328699

RE: Flying in limited space.
Sorry...just a pic I pulled from Google. [:o] I remember getting a Cox P-51 christmas morning 1976. So they quit making them?
Posted on: 8/31/2007 8:32 PM by Author "warhwk" in the forum "Park Flyers & Backyard Flyers"
http://www.rcuniverse.com/forum/fb.asp?m=6312425

RE: Flying in limited space.
This one comes with the tether built in. [:)]
Posted on: 8/31/2007 6:43 PM by Author "warhwk" in the forum "Park Flyers & Backyard Flyers"
http://www.rcuniverse.com/forum/fb.asp?m=6312057

RE: My 9 yr old just soloed
Here are some pics
Posted on: 8/28/2007 3:08 PM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6298842

My 9 yr old just soloed
Not technically a Solo since we were still on the buddy box, but I'm proud of the little guy just the same. We usually take out the Kadet Senior, but yesterday Jake and I took the generic .40 Trainer. He had it in his mind he was going to make his first landing but I wasn't so sure. He often just wants to do loops and fly around a bit without showing any real interest in controlled flying. I have not let him get below 50' often, so this was new territory for him. From the first take-off, I told him he could make landing approaches but he could not land until I said so. After about 25 laps around the pasture, he was lining up with the runway at less than 10' without any corrective measures on my part. After a few repeatable good approaches, I had him chop power and land. It almost caught him by surprise, but he made a nice flair and one small hop, and he was down with the engine still idling. We continued with at least 50 more touch-and-go's and five full-stop landings, never once killing the engine. Only later, did I realize he was probably intimidated by the sheer size of the Kadet Senior, and the smaller cheaper Trainer 40 was easier on his confidence no matter how well the Kadet actually flew. He can't wait to go out to the field with me to fly some more. Life is good!!
Posted on: 8/28/2007 12:12 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6296468

RE: 2 stroke vs 4 stroke fuel
YEEEHAAA!!! I've always wanted a Metric crescent wrench, and oh boy...a left handed screwdriver!!!
Posted on: 8/27/2007 12:27 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6291660

RE: Would this work?
A reversing Y harness will do the trick. I did this on a couple planes until I got the 9CAF. I can finally toss those reversers away. Cental Hobbies sells a Bellcrank that easily might solve your problems. I am running them in two planes succssfuly. http://www.centralhobbies.com/control_linkage/Bellcrnk.html
Posted on: 8/26/2007 4:35 AM by Author "warhwk" in the forum "3D Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=6287835

RE: ATTENTION ALL P-51's - The Gathering of P-51 Mustangs and Legends
Here is my little Mustang. It is an old EZ with a Saito .82.
Posted on: 8/26/2007 2:25 AM by Author "warhwk" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=6287712

RE: Transporting your plane???
Here is a tip for those with Mini-Vans. With the Seats folded down or removed, a plywood shelf can be built that will sit on the armrests. It almost doubles my carrying capacity and can be quickly removed for people transportation. Sorry, no picture [8|]
Posted on: 8/26/2007 12:58 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6287552

RE: 2 stroke vs 4 stroke fuel
Is it me??? Or do I smell sarcasm [:D][:D][:D] I think the first generation OS 4-strokes could be operated on lower oil percentages. Is this correct?
Posted on: 8/25/2007 11:21 PM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6287276

RE: Wazzit?
Yeah...[:D] I was chuckling to myself too. Yahoo and Google no help. I'm stumped. Next...
Posted on: 8/25/2007 9:37 PM by Author "warhwk" in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=6286856

RE: Wazzit?
Is it a StearYak?
Posted on: 8/25/2007 9:20 PM by Author "warhwk" in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=6286787

RE: Wazzit?
Is it a Russianbipe?
Posted on: 8/25/2007 8:08 PM by Author "warhwk" in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=6286534

RE: Du-Bro RC Heavy Duty Control Horn
The important thing is to get both holes for the clevis exactly over the hinge line. Otherwise you end up with diffent throws on each elevator half. Like Ken said, harden the holes with CA or they will wallow out. I use a 1/2" round piece of lite ply on each side glued to the sheeting for extra stiffness.
Posted on: 8/25/2007 6:16 PM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6286225

RE: BIG engine on 1/4 scale Cub
Can you tell us why you want to hover a Cub? The tail control surfaces are pretty small for any real control. also, the ailerons are completely out of the prop wash.
Posted on: 8/25/2007 12:34 AM by Author "warhwk" in the forum "Giant Scale Aircraft - General"
http://www.rcuniverse.com/forum/fb.asp?m=6283897

RE: confused with the aerodynamics
[i][/i][i]What happened to you during the landing sounded like a stall, At that point up elevator will only keep you from regaining speed, and results in the airplane heading nose down till it hits the ground. [/i][i][/i] Yup, the elevator only works if the wing is at flying speed. It's hard to put the nose down so close to the ground. We've all been there.
Posted on: 8/25/2007 12:30 AM by Author "warhwk" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=6283877

RE: Starter for 4 stroke
[quote]ORIGINAL: cvedral I bought a 12v motorcycle batt. It's on charge. Let you know tommorow. [/quote] A good battery makes all the difference. I can start a Supertigre 3000 with a Hobbico 180. but only after I switched to a MC battery. No gel cells for me...
Posted on: 8/25/2007 12:10 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6283813

RE: Looking to get a gas powered warbird... any suggestions?
Hanger 9 Mustang or Thunderbolt with a Saito 180, Topflight P-51 and Zenoah G45. Not really many choices in Gas ARF Warbirds are there? I personally would like to see more ARF G62 warbirds similar or based the Ziroli's. If only I had the time....and the space...oh...and the money.
Posted on: 8/24/2007 1:15 AM by Author "warhwk" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=6279713

RE: Flying time on a receiver battery.
Here is an inexpensive loaded voltmeter I use. It has already saved one plane from battery failure. http://www.horizonhobby.com/Products/Default.aspx?ProdID=EXRA502 I also use the Double-Vision Quick Field Charger for the last several years with good results. It will top off the Tx/Rx at the same time in about 12-15 minutes. http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN114
Posted on: 8/24/2007 12:15 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6279590

RE: Supertiger S 3000
Here is the manual for the 3250. It says 15% oil for break-in and 10-12% after. (see page 13) http://manuals.hobbico.com/sup/supg0268-manual-v1_1.pdf
Posted on: 8/23/2007 10:50 PM by Author "warhwk" in the forum "Giant Scale Aircraft - General"
http://www.rcuniverse.com/forum/fb.asp?m=6279290

RE: Beginner with some concerns.....
Only thing different on the airplane two-stroke engines is that you do NOT tune for max RPM on the ground. The prop unloading in moving air tends to cause the engine to lean out a bit once airborne. After reaching max rpm, back off the high speed needle until there is a noticeable audible rpm drop. 300 rpm from max is the norm. In other words, just slightly rich of perfect. A little too rich wont hurt anything except fuel mileage. Obviously, the idle transition is much more critical. You need to be able to sustain an idle for at least 30 seconds without the engine loading or dieing. While you are considering how deep to jump in, I would visit every field in your area and find the one that best suits you. Ideally, you would find a club that welcomes newcomers, has a club trainer and instructors ready to let you take swing at it with you are on the buddy box. I feel you should meet your instructor to be, before laying out cash on a plane and radio system that may not be compatible with his. My club has beginner Mondays during the summer months. Anyone can show up and fly the club trainer planes. Follow this link to search for AMA clubs in your area. http://www.modelaircraft.org/clubsearch.aspx
Posted on: 8/21/2007 4:22 AM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6266176

RE: Missed a perfect day for flying
At least you got one flight in. I'm sure it is a nice feeling to be able to fly without assistance. sorry about your radio.
Posted on: 8/18/2007 11:16 PM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6256375

RE: Beginner with some concerns.....
I am going to go against the grain and recommend the RTF, or at least an ARF. (plus .46 engine, radio and starting accessories) I have always suggested that your first plane should NOT have a high emotional investment. Any of the common hi-wing trainers will work just fine. Once you can fly on your own, the possibilities are endless. I have to agree, seeing a box of sticks take flight is a great feeling. But I feel it is not the best choice for learning to fly.
Posted on: 8/18/2007 11:05 PM by Author "warhwk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=6256324

RE: great planes fokker dr1 46/80 size arf(glow engine)
It is not currently in production from Great Planes. There may be a few around NIB. I would check the auction houses as well as individual stores. Hanger9 is still making the Sopwith. http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN4225
Posted on: 8/17/2007 7:55 PM by Author "warhwk" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=6251796