RE: Accesory for aluminum grinding
90% of the time I use a 6" sanding disk with 60-100 grit paper. For roughing I use a hacksaw, bandsaw or even bolt cutters. Be careful of magnesium parts. The sanding dust is extremely flammable, when you work on steel the sparks will light off the magnesium dust.
Posted on: 9/13/2012 7:38 PM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11227874

RE: beast oil to use in breaking in a dle 55
I probably would not use " beast oil". [:D] The critter might not want to give up his oil. Any 2-stroke oil will work fine. Most folks fret over oil brands too much, IMHO. Just use enough oil in the premix and you will be fine. I am currently running Pensoil outdoor two stroke at 4 oz per gallon (32:1). My decision was based on the fact that Kmart had it. It does not slime my planes. It does give plenty of lube. I can not figure out why some are preoccupied with running oil poor mixes. If the engine maker has a suggestion do that. I never ran a special oil or mix for break in. I guess I spent my time flying rather than worrying about oil.
Posted on: 9/11/2012 9:23 PM by Author "Scota4570" in the forum "Giant Scale Aircraft - General"
http://www.rcuniverse.com/forum/fb.asp?m=11225747

RE: A123 Question
Speaking of charging, should I store my new A123 packs fully charged or partially charged? I did not know that leaving LIPOs fully charged was a bad thing until last weekend. Is it the same for A123s?
Posted on: 9/10/2012 9:13 PM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11224579

RE: IMAX B6 confusing me, I need to measure amps
[quote]ORIGINAL: Truckracer [quote]ORIGINAL: Scota4570 Really??? I paid for a 1800 MAH battery. I fully charged it. I discharged it down to the low voltage limit, 9V. I then fully charged it. The charger says that the battery has a capacity of 726 MAH That is only slightly more than an old NiCD AA. Really????????? [/quote] Maybe I can help here .... one question at a time. Given a fully charged
Posted on: 9/6/2012 8:46 PM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11220251

RE: IMAX B6 confusing me, I need to measure amps
Really??? I paid for a 1800 MAH battery. I fully charged it. I discharged it down to the low voltage limit, 9V. I then fully charged it. The charger says that the battery has a capacity of 726 MAH That is only slightly more than an old NiCD AA. Really?????????
Posted on: 9/6/2012 6:33 PM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11220152

IMAX B6 confusing me, I need to measure amps
I am making the leap to LIFE as my RX packs. I was hoping to use my current charger. It is supposed to count MAH used or put back in a battery. When I discharge or charge the count is way too low on this charger. See attached, the yellow circle is around the counter. The figure illistrated is supposed to be the capacity. This is after a discharge then fully charge cycle. Obviously way low, what's up?
Posted on: 9/6/2012 5:24 PM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11219543

RE: IMAX B6 confusing me, I need to measure amps
I appreciate the help very much but, Now I'm even more confused. [;)] I discharged it down to 9V. The charger does that automatically for 3S Lipo. It puts a 2.? Amp load despite me programming in 5 Amps. So, once it is at 9V I go ahead and charge it to whatever the charger decides it correct, 12.6 V in this case. It put a number of 726 as the amps put in the battery that is obvious not correct. I could slap the right resistor across the battery, hook up a VOM and run a stop watch to figure out what the battery holds. I need to figure out what a flight used by how many amps I put back in the battery with the charger. With A123s the discharge curve is so flat that you can not judge remaining capacity by measuring the voltage. Can this charger do that? IF not what charger will? It would help to be able to charge via the balance lead. That would save me making up a special charging harness. It would be really cool to have a charger that operated on AC and could do tow A123s at once.
Posted on: 9/6/2012 5:19 PM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11220071

RE: IMAX B6 confusing me, I need to measure amps
You are correct, I didn't say it was. The point is that the MAH counter is not in the ballpark. I need to be able to measure what was used and what was put back with the proposed A123 cells. When I purchase a pile of A123 cells ,today or tomorrow, i need to know if I need another new charger. This charger does many types of batteries including LIPO and LIFE. If the counter is junk for LIPO it is likley junk with LIFE. BTW, it is not just this battery, it is several batteries, same gibberish. "726" means nothing. It is a smaller number with smaller LIPOs, but still not reflective of the capacity. Any ideas on why the counter gives a count that is not even remotely reflective of the battery's capacity.
Posted on: 9/6/2012 11:06 AM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11219662

RE: IMAX B6 confusing me, I need to measure amps
That was a terrible picture! How about a mulligan?
Posted on: 9/6/2012 9:25 AM by Author "Scota4570" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11219547

RE: Is a 19x8 to much for a 33cc
The 18x6 is making about 1.1 hp at 6500 A 19x6 would probably turn about 5900 rpm http://personal.osi.hu/fuzesisz/strc_eng/index.htm The larger prop at a lower rpm, same pitch would be even slower. It sounds like you need a more powerfull engine.
Posted on: 9/3/2012 7:57 AM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11215611

RE: Blue foam fuselage
OK, west marine epoxy. What weight glass cloth for a 1/4 scale. Sanding the epoxy and filling imperfections, what is the correct epoxy that can be sanded, how about filling little holes.
Posted on: 9/1/2012 8:12 AM by Author "Scota4570" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=11213490

RE: Blue foam fuselage
I have been using two part epoxy from the craft store. It is obviously junk. I live in a technical wasteland. One can get poly resin from an auto parts store. My idea regarding leaving a layer of foam intact is based on observation. I have made cowls by laying cloth over a foam plug. Even the thinnest cloth layer over a foam plug is really strong. Remove the foam and it is very frail. Why not leave a little foam in place as a stiffener?
Posted on: 8/30/2012 9:22 PM by Author "Scota4570" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=11212246

Blue foam fuselage
I want to make a fuse for a large pattern plane. I have a bunch of blue builder's foam. I would like to make the fuse in halves. My plan would be to, stick two pieces of foam together with double stick tape. Bandsaw out the profile. Carve what I want. Carve out the inside leaving 1/2" walls (adds rigidity at a low weight). Add internal parts. Stick it back together. Glass with polyester resin and glass cloth. Bondo sparingly. Does poly resin eat blue foam? I want to use what I have. If need to buy stuff (epoxy resin) I might as well stick build it out of balsa. Besides I have found epoxy resin to be more difficult than poly resin. I suppose could also buy a pile of florists' green foam for my core, it is cheap.
Posted on: 8/30/2012 6:01 PM by Author "Scota4570" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=11212083

RE: Throtle Spring
If you set up the linkage properly servo torque of a standard servo is more than adequate with the spring as issued. Leaving the spring in place puts a small load on the linkage and removes all play. The spring closes the throttle in the event of a linkage failure. I can not think of any good reason to remove or alter the spring.
Posted on: 8/29/2012 6:32 PM by Author "Scota4570" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11210950

RE: 8FG Super flaps, need help!
[quote]ORIGINAL: malcolmholt [quote]ORIGINAL: Scota4570 I am making progress, thanks. I think they should have included example programs in the TX and tell you how to hook up the RX to make it work properly. This unit has a bunch of memory so it should be no big deal. In fact, one of you guys who are really good with this radio could do just that. Put example airplanes on a flash card and write
Posted on: 8/27/2012 8:55 PM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11208524

RE: 8FG Super flaps, need help!
I am making progress, thanks. I think they should have included example programs in the TX and tell you how to hook up the RX to make it work properly. This unit has a bunch of memory so it should be no big deal. In fact, one of you guys who are really good with this radio could do just that. Put example airplanes on a flash card and write some, painfully detailed, instructions showing exactly how to set up the airplane to work with that example programming.
Posted on: 8/27/2012 10:43 AM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11207787

RE: 8FG Super flaps, need help!
Thanks, I hope you are right. I had a revelation today, they call flaps "camber". That is sooooo wrong. I also noticed numerous misspellings. For a $500 radio they need to have an English speaking RC modeler re-write the manual. It a mess. I would expect that sort of thing from a Hobby King el cheapo radio not an expensive Futaba unit. IMHO the manual is organized backwards. for instance, if I want to assign the flaps to the slider I should be able to look up "flaps" in the index. There is no index! 134 pages and no index? If there were an index I should be able to go to the "Flaps" page and follow a flow chart. Instead the manual is organized into four sections based on the four quadrants of the whiz wheel. The table of contents is pretty much random. There is no organization that helps you find what you want to do. You have to scan down the columns to find what you need to do. If what you want is, for instance, "flaps" you are SOL because they think "camber" is "flaps". That is poorly done in the extreme...........I think.
Posted on: 8/26/2012 9:04 PM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11207143

8FG Super flaps, need help!
I can not figure out how to make the left slider operate the flaps, or any other switch or knob of that matter. Page 84 of the manual shows p-1/2 of the radio menu, it shows flaps. My radio is not like this. Simmilar but different. P-2/2 is completely different on my radio. I tried switching to "glider" and it changed nothing. Comment.........I saved my pennies. I did my research. I hemmed and hawed. I finally spent family funds to buy this radio,........... and I hate it. It is too complicated. I am not stupid or techno-phobic. I am a professional scientist for gosh sake! It is taking the fun out of my fun hobby. It makes my blood boil in frustration. Unless you are a techno geek think hard before you buy.
Posted on: 8/26/2012 1:55 PM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11206684

RE: Zenoah Crank Thread
The Toni Clark website has mechanical drawings of many Zenoahs.
Posted on: 8/21/2012 8:38 PM by Author "Scota4570" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11201650

RE: Zenoah Crank Thread
http://www.custompartnet.com/tap-size-chart Get a set of digital calipers and a thread pitch gauge set and figure it out. My best guess is 10x1.25. Some of those could be left hand threads. What kind of special project required putting anything on the stater side? Normally I just cut that end off.
Posted on: 8/19/2012 1:22 PM by Author "Scota4570" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11198853

RE: Need more power which 42 -46cc to convert
The Echo SB-1080 shortblock is the basis of the BME 50. If you are going to buy something then buy one of these. Of the 20 or so conversions I have done this is the best by a mile. It has everything going going for it. It is light weight, beam mount, and no goofie carb attachment work arounds. If you want you can buy everything you need to "convert". Get a NOS 13 or 15mm walbro carb that has an accelerator pump. Check on EBAY for a NOS carb.
Posted on: 8/15/2012 9:29 PM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11195316

RE: Header parts for home made??
Folding furniture, beach chairs and such. I also salvaged some useable steel tubing from a device that was designed to keep kids from rolling out of bed. Medical stuff...canes and crutches. Thrift stores have buckets of it.
Posted on: 8/14/2012 9:32 PM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11193965

RE: Stihl 62cc challenge....
[quote]ORIGINAL: john josey I've worked with stihl saws every day of my working life and often wondered if the de-compression valve would be of any help in our modeling instalations [/quote] No..............
Posted on: 8/12/2012 3:24 PM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11190705

RE: High rpm 20cc motors
Uber high RPM.............electric
Posted on: 8/7/2012 8:30 PM by Author "Scota4570" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11185058

RE: Unexplained loss of control
It was my first crash in several years. I guess I was due.
Posted on: 8/7/2012 8:21 PM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11185051

Recomend me a motor?
I am working on a scratch build Airtronics Q-tee. It was my first RC airplane in about 1976. It used a Cox 049. I would like to buy a motor form Hobby King or similar that would turn a 6x3 prop at about 15k. That would be about 10 amps? I would be running 3S lipos. So about 1500KV?
Posted on: 8/4/2012 4:29 PM by Author "Scota4570" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11181018

RE: Unexplained loss of control
I posted earlier that I think it may have been a programming error. Here is a pic of it. It was nice. Covered in dacron and dope. It flew great, very soild and straight. It went exactly where I pointed it and stayed there. Like it was on rails.
Posted on: 8/4/2012 8:57 AM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11180695

G38 carb
A friend at my club is having trouble with his G38 carb. It is a WTA 6. Wanting to be helpful, I pointed out that one can buy a NOS carb off Ebay cheaper than a rebuild kit. I looked through my box-o-carbs and notticed the WTA 6 has an odd angle on the main butterfly pivot pin. He is not interested in changing his linkage. Can anyone suggest a drop in replacement I might find on EBAY?
Posted on: 8/3/2012 5:52 PM by Author "Scota4570" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11180159

RE: Unexplained loss of control
Back to my Kaos.............. The following weekend it was all patched up. I took off and made a circuit of the pattern. On my return leg the wing departed the airplane. The wing fluttered to earth with no damage. The fuse landed like a lawn dart. Obviously there was undetected damage. It was cursed! RIP
Posted on: 8/1/2012 7:19 PM by Author "Scota4570" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11177882

Compensating for to much current draw?
I have a Park 300 out runner and 10A speed control. Using a 3s lipo the props I have are drawing about 10 amps. The motor is rated for 7 amps. It is getting hot. If I throttle back a couple of clicks I can get it down to 7 amps. Can I adjust the throttle volume to obtain the correct current with my props? I see this as a way to make a "virtual" 2S battery. Am I missing something?
Posted on: 8/1/2012 6:47 PM by Author "Scota4570" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11177848