RE: gas fuel with glo plug no ignition
I guess I am the only one, who stick to original idea: gasoline-oil-glow plug (no methanol at all). The glow plug is powered from 3700mAh NiMh on board. After replacing carb in my old Poulan 25 it got good power as good as can be. The first carb got plugged by some goo that gas-methanol-oil turned into over the winter (my fault I did not clean the plane after the last flight). With gasoline mixed with 2-cycle motor oil no more goo even after months (now I can be lazy). The second plane is very old ASP 60 (2-cycle glow engine) that was never reliable on glow fuel (it used to die out of the blue without any warning). With the smallest walbro I could get it runs 24 minutes on 8oz fuel tank hauling 7lb trainer (a little bigger Spadet). No more "die because..." in the flight. And I verified it has the same power (same RPM on the same prop) as it was powered with glow. Methanol-oil it may be same cost as gas-oil now but you will need more oil in the mixture (correct me if I'm wrong, but I heard that metanol needs more oil in the mixture to provide proper lubrication) and more fuel on board (higher take off weight). Right now I don't have any plane on methanol - everything below size 60 is electric, bigger than that is gas-glow or gas-spark.
Posted on: 4/16/2011 4:16 PM by Author "RysiuM" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=10466733

RE: The new electric YAK 54 from Greatplanes!
Just remember that the weakest point is going to give under the stress. If you enforce the existing weakest point there is something else became the one. Better to not have the weakest point in the part that is difficult to restore (for example the fuselage). So if you made the LG mounting plate strong, don't use metal screws but maybe nylon screws that are going to brake under hard/crash landing.
Posted on: 11/10/2010 1:36 PM by Author "RysiuM" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=10126847

RE: The new electric YAK 54 from Greatplanes!
Nice job on the plane. What is the final weight? I can't see from the photos, did you put some color on the covering on the bottom? This thing is next to impossible to see in the air the way GP "painted" it. My camera broke, so no pictures on the CF landing gear installation yet. I will try to figure out something and post them.
Posted on: 9/27/2010 9:16 AM by Author "RysiuM" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=10030278

RE: The new electric YAK 54 from Greatplanes!
[quote]ORIGINAL: jvictorfc is there any way to take a pic from the entire part on ele where the CF rod is glued? [/quote] Sorry, not for next two weeks - I'm traveling. One thing - on each surface and the bottom of the fuselage I glued a small piece of CF fabric to reinforce the "anchoring" place for CF rods. Look at the pictures in that post.
Posted on: 7/28/2010 7:39 AM by Author "RysiuM" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=9893616

RE: The new electric YAK 54 from Greatplanes!
[quote]ORIGINAL: jvictorfc Please if someone can help me before I take off and crash it.. [/quote] See my post with pictures on the previous page. Four CF rods do the job. I have also found that original landing gear is very soft. The plane tripped on a crack in the runway and that was enough to band the landing gear. I bought CF gear from Hobby City ([link=http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=4504]Carbon Fiber Landing Gear 150mm[/link]) and it fits almost. Almost because the mounting part (on fuselage side) is to short to mount to original screws. To solve the problem I made aluminum plate with two matching holes (you cut it out of the original landing gear) and sandwitched the CF between this plate and fuselage. To increase friction so it does not move, I put a dual sticky tape on both sides of CF. I tested new CF landing gear and it springs properly however it does not bend. This is good proven solution. I'm flying with 2200mAh 3s Zippy so it is heavier than it should be about 800g (28 oz) but with that setup the lowest weight I can get is about 27oz if I replace the battery with 1500mAh.
Posted on: 7/25/2010 1:11 PM by Author "RysiuM" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=9887369

RE: gas fuel with glo plug no ignition
I found one bad thing about the gas-glow fuel mix at least with the oil I used. The fuel separated and created a small flakes of something that clogged the carb. I wanted the engine trouble free so I changed to gasoline only. So I was running my Poulan 25 on Gasoline/oil mix with glow plug that was powered all the time. I lost some power comparing to gas-glow fuel mix but no more problems with fuel separation. The bad thing that the engine did not sound "clean" - regardless of the mixture setting it made the sound like always to rich. I did not have a clue how to fix it until I think I found the problem few weeks ago. Poulan 25 originally has ZAMA carburetor with 7 mm throat. For the sake of experiment I replace it with WT322 that has 9.54mm throat. That was it. The engine runs clean and gets 1500 rpm more. Still on gasoline-oil mix with glow plug powered all the time.
Posted on: 7/16/2010 6:38 AM by Author "RysiuM" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=9868514

RE: I need carbon fiber wing tube 22mm (650mm long)
Now 5 years later I have almost the same question: Where do you guys buy CF wing tubes? CST has only two sizes available and looks like they are going to discontinue that. I'm looking for 16-20mm OD tube about 24 in long (for the warbird 63 inch, about 7 lb). I have learned how to make my own FB sleeve, but I am not confident in making my own wing tubes.
Posted on: 3/27/2010 4:26 PM by Author "RysiuM" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=9616442

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: GWHASH how do you hook up the 2 ESC's so they work together and create equal thrust? [/quote] Two identical motors, two identical ESCs programmed with the same parameters. I don't use "auto-learn" on the throttle (feature of some ESC which makes them learn what is the maximum throttle position on the radio) but used fixed values. This way throttle curves on both ESCs are the same. And like [b]wsame[/b] wrote: one battery powering both ESCs connected to the same radio channel (via Y-cable).
Posted on: 3/8/2010 12:28 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9563287

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: GWHASH  My A-10 won't fly at all. I upgraded to a 3 cell, 1400mAh, 20C. If I try a ground take off it won't leave the ground. If I hand launch it, it goes about 6 feet then nose dives straight down. I've rebuilt the nose twice now. I want to change it over to brushless but am disabled and on a very limited budget. [/quote] [color=#FF0000]Shame on you, NitroPlanes. [/color] Many had exactly the same result. The plane itself is nice flying machine (but not a beginner airplane) but brushed motors are not to the job. I don't see any reliable solution except brushless conversion (other than hanging it on strings from the ceiling.
Posted on: 3/7/2010 2:27 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9561566

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: STSDriver Hyperflows are installed ready to go, 2200mah 20C 3s Lipo is in and fitted, [/quote] Now this is gonna be hot. From the picture I see you have motors 2435 at kv=4400. I have installed the same motors (2435) but kv=4040 and at 3s lipo WOT it is to much power to fly. You may expect over 40A taken from the battery so be easy on throttle.
Posted on: 2/5/2010 2:13 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9477681

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]I finally got a hold of someone at Nitroplanes support and they said that they cannot support any products that were bought through the AMA show. [/quote] Frankly, I never heard from anyone about getting support from Nitroplanes on anything. But it's been beaten up so many times on so many places. Generally the idea is, that Nitroplanes can sell their stuff cheap, because they don't stay behind any product they sell. Quite easy business model. But for $, sell for plus more $$, zero cost on customer service. Price can be low because cost is low and predictable. If I buy stuff from Nitroplanes I have the following assumptions (and expectations): 1. What I get may be damaged in shipping 2. What I get may be not what was advertised (in 99% cases NP products are poor quality, and over-advertised) 3. For all that I pay small price taking the risk listed above. A-10 I bought from them was no surprise either. Plane had broken parts (broken of some foam parts from the fuselage, broken servo horn), plane did not fly out of the box (over-advertised), but it was cheep at that time. Basically buying from NP is buying what we call "cat in a bag" - after you payed, you can look inside.
Posted on: 1/16/2010 2:14 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9420106

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: wsame Another post mentioned ''breaking'' in the motor/fan unit by running 1/4, 1/3, 1/2, then 3/4 throttle for a few minutes. [/quote] Be careful with "breaking" fan like that. What exactly it does it shaves the fan blades by scraping it of the inside of the case. But at the same time it will weaken the blades by bending then because of excessive force is put on the blade. The bottom line is that "shaved" rotor might be running smoother, but at WOT blades may foll out.
Posted on: 1/14/2010 3:11 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9415677

RE: Nitro Planes A-10 Warthog for 95 dollars
I have two comments: 1. The sound of rpm from motors they are turning very slow - so it looks like the power is what you wrote. Maybe your plane came with the motors of lower kv. 2. With so little thrust it's almost unbelievable the plane is flying - but it looks like it is very light. The plane itself is a great floater so maybe low weight might be a solution to the power problem.
Posted on: 1/7/2010 12:40 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9395616

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: WhiteKnight68 Not sure my fluke multimeter was the right tool for the job, but I only read 7Amps @ WOT for both motors... with 11.1 lipo!  [/quote] That sounds very low. If the battery holds the voltage it is still less than 80W. For 20+ oz EDF plane it is very low. Brushed motors (Mabuchi type) have less than 50% efficiency and that gives even less power to move the air. Funny thing - all the physics is up side down.[:D]
Posted on: 1/5/2010 2:07 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9389409

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: STSDriver The battery was upgraded to a 11.1v 1250mah 10C lipo.[/quote] When I select a battery for a plane I have two criteria: 1. Max current drawn by the engine(s) can no exceed C times capacity. It doesn't matter if I use WOT during the flight or not. 2. The capacity of the battery should be adequate to the expected duration of the flight (with reserve of course). I only tested one Guanli'a A-10 and when I measured the current of one engine it was 8A at 8.4V (my [link=http://www.rcuniverse.com/forum/fb.asp?m=7093691]post # 6[/link] in the thread). I did not measure the current at 11V but I expect to be even more. Maybe my assumptions are wrong because other guys have different brushed motors in the plane so can anyone check what the current is taken from your brushed plane? The video shows flying however on the underpowered site (the plane can not keep altitude while banking) - it was my experience too. Takes 100ft on the ground roll before lifting to the barely flying. Like may other owners of that plane I wonder how long these motors will last at 3s LiPo. I still don't think the brushed version is the one to keep.
Posted on: 1/3/2010 1:28 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9383078

RE: Nitro Planes A-10 Warthog for 95 dollars
Somehow I'm on NitroPlanes mailing list - I guess because I bought the plane from them [:)][:)][:)] Anyway, now Nitroplanes advertises brushless planes down do below 90 dollars (J3 Piper Cub) and A-10 BL for below 140 dollars. I believe now is not smart to buy brushed version so this thread should bring quite different conclusion to the subject now: [b]"Brushed version does not fly, and it is cheaper to buy brushless version than trying to upgrade brushed version to the flyable condition"[/b]. It was fun and learning experience to make this thing flyable, but for someone who just want to fly a plane, it is not worth the money to go through the upgrade path like I did. (You see, I am not against the Nitroplanes at all, just against the lying thing [:D])
Posted on: 12/18/2009 5:58 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9341805

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: STSDriver Anyways I was wondering why, based on BananaHobby's video[/quote] Probably for the same reason, that Banana Hobby, Hobby City or Nitroplanes started to sell brushless version. [:D][:D][:D] BTW That video amazes me - reminds me of my first flight with 3s LiPo with stock brushed motors. That flight made me realized, that I was quite skilled pilot too [:)]
Posted on: 12/15/2009 12:52 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9331873

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: ChicagoFun DO NOT BUY ANYTHING FROM BANANA HOBBY!!!![/quote] Sorry for your trouble, but your post has nothing to do with the subject of this thread. It is not even a boat section of RCU but Electric RC Jets (that means airplanes), and we are talking about A-10 here.[:@]
Posted on: 10/8/2009 6:39 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9157339

RE: Nitro Planes A-10 Warthog for 95 dollars
I'm believer ;-) Looks like the new BL version has enough power do do what ARF supposed to do. It's till not a beginner plane, but at least the problem with engines were fixed. BTW, this thread started about 18 months ago. So much time took NP to figure out what is wrong and how to fix it[:D][:D][:D]. My modified plane was ready in less than 2 months including all prototyping, experimenting, and waiting for parts to be mailed in.
Posted on: 10/3/2009 12:35 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9142676

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: jab1026 stock motors are giving me 17.6 oz of thrust on 3s lipo battery. (8.8 oz each) my plane is weighing in at 25 oz ready to fly. .7/1 thrust to weight ratio stock. [/quote] See [link=http://www.rcuniverse.com/forum/fb.asp?m=7125477]my post from the befinning of this thread[/link]. I measured static thrust of stock brushed Guanli motors - total on 3S lipo I got 10 oz. So your brushless version is quite improvement. Total weight seems to be the same as other A-10s.
Posted on: 9/28/2009 2:21 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9129127

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: jab1026 My biggest concern is the stock motor is a 1200kv outrunner. [/quote] I just checked Nitroplanes site. They wrote it is 1200kV. I'm not sure if they don't know what they have, they lie in purpose or it is truly 1200kV, which probably will not have enough RPM to fly. We run motors that are between 3600 kv to 4500 kv. This is at least three times faster. If you run 1200kV motor on 3s Lipo you will get less then 14k rpm. It would be worse than brushed version. So anyone who bought such plane please confirm the kv of motors in there?
Posted on: 9/26/2009 4:29 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9124893

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: p51speed I bought my a-10 at the swap meet at rc country here in sacramento last week end i have flown it four times and i am realy impressed [/quote] Where do you fly it here, if I may ask?
Posted on: 9/22/2009 9:43 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9114901

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: luvmykids2 Yea, looks like you did a nice job with it. [/quote] Actually I did not need to do anything. Just keep the elevator up. It did not tip stall, did not drop the wing, did not fall on the nose, sis not snap. Kind of funny, that you may fly thys plane at slow speed high alpha like a pizza box. What I was saying - this plane flies very well not even taking int account that it is EDF not a prop (every EDF is slow on power) and quite small size. Not a trainer means: If you screwed up. you are done - you end up with pile of styrofoam. It does not correct it's attitude. It will fly where you point it - it is not a trainer that will correct itself when you let go on sticks. But if you know how to fly the plane, this one is quite fun.
Posted on: 9/16/2009 11:55 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9102242

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: luvmykids2 I just wanted to see if it had decent flying characteristics. [/quote] See my video flying after converting to brushless at [link=http://www.masmrc.com/events-and-fun-stuff/videos/121-modified-guanli-a-10]www.masmrc.com[/link] About 2:35 at this video you can see I stalled it at the slow speed and it just dropped flat.
Posted on: 9/16/2009 3:17 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9100883

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: luvmykids2 It seems like there is a lot of negitive on this plane, but is it just the powerplant? Does it fly good once you get it in the air? [/quote] Only negative on this plane are: - 27MHz radio (useless in most parts of the world) - Engines/rotors (underpowered, unbalanced) - Battery (NiMh undersized for the power required) These three I have changed and after that the plane is very nice flyer. It is not a beginner airplane, but the flying characteristic is very good. There are minor things, worth to mention here, but easy to fix and they are nothing so big that might stop you from loving this plane. - landing gear wire is to soft (easy to be replaced with real piano wire) - some people complained about servos - I don't. But if you get bad servo, it is easy to replace it with 3-dollars servo from Hobby City. - the foam is soft, but is is not a "slam around" plane. Be gentle wit it, and it will fly well and look great. So the bottom line is, that looks like NitroPlanes and Banana Hobby wised up and fixed the power issue (engines, ESC and battery). I don't know about the radio.
Posted on: 9/16/2009 1:34 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9100654

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: Tony A. My A-10s are stock and I like them. [/quote] Be specific - brushless from Banana Hobby or brushed from NitroPlanes? This is a big difference, so without that people may be confused or even worse, got wrong impression.
Posted on: 9/15/2009 12:28 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9096552

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: mossypilot as soon as I connect it (TX on) the motors scream (in reverse) and there is no throttle control at all. Any ideas? [/quote] Reverse polarity on battery. I guess you have connected battery wrong. ESC can be fried now.
Posted on: 8/24/2009 9:43 PM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9042085

RE: Nitro Planes A-10 Warthog for 95 dollars
[quote]ORIGINAL: canwhitewolf how did you remove the original ducted fans from the nacelle to replace them with the new ducted fans from ELE? was it difficult? [/quote] Is it necessary? Most of GWS-like EDF have the same design - at least on the duct and motor mount, so it may be possible just to swap motor and rotor.
Posted on: 7/12/2009 1:46 AM by Author "RysiuM" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8925744

RE: has anyone done this ?????
Speaking about Guillows conversion I did one recently. It was Cessna 150 (24 inch wingspan). I have converted it to 4 ch RC (ailerons, Elevator, Throttle and Rudder (with steering front wheel). It is a long story described on polish language forum [link=http://forumrc.alexba.eu/ipw-web/bulletin/bb/viewtopic.php?t=9929]Alexrc.com[/link]. If you don't read Polish there are still plenty of pictures over there. For short description the plane is covered with tissue with some balsa sheeting and almost all wood is stock. The power comes from C-10 2900kV (from Hobby City), TURNIGY Plush 6A /.8bec/6g, Assan micro 4ch Rx, 3 servos HTX-500. All powered by 2s 400LiPo (Zippy). Model has also Nav and Landing lights (and beacon) and custom made electronic power switch. The plane weights 150 g and flies exactly like 152 just 3 times faster (in scale speed). Video from the maiden flight on my club's website [link=http://www.masmrc.com/events-and-fun-stuff/videos/122-cessna-n67405-first-flight]www.masmrc.com[/link].
Posted on: 7/11/2009 6:15 PM by Author "RysiuM" in the forum "Electric Indoor & Micro RC Flight"
http://www.rcuniverse.com/forum/fb.asp?m=8924714

RE: I need carbon fiber wing tube 22mm (650mm long)
No, it was Power Hobbies Edge, 120 size. The trick with masking tape works great. I put stripes of masking tape lengthwise (not spiraling). This way the tupe is smooth and the same diameter at every place. Then i painted the tape with dope few times and polished wit 1500 grid sandpaper. It is quite hard and waterproof. It's been few years since i did it and the tube is still like new.
Posted on: 7/9/2009 2:49 AM by Author "RysiuM" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=8918216