RE: Two Stroke Oils
[quote]ORIGINAL: TimBle The part numbers are different because its specified in the contract that they are different.... HOw do I know that the contract specifies a different part number? Because all lubricant blenders who toll blend for other companies have similar provision in their contracts and it assists them in tracking their SKU's. the lubricant formulation may be similar to BP BioLube 2T but the packaging and label is different therefore its a different SKU and gets a different part number [/quote] Good explanation
Posted on: 5/17/2013 9:05 AM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11514266

RE: Two Stroke Oils
Thanks Charlie P That answers it. The bottles I have list part number 0781-313-8008, which matches the numbers given by Omni Specialty Packaging. Castrol part number is different even though they produce some Stihl oil. Mike
Posted on: 5/17/2013 6:01 AM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11514060

RE: Two Stroke Oils
I'm curious if anyone knows. Does Stihl make their own oil or do they buy it from some major oil company and then rebrand it as their own. I'm not dissing Stihl as I use their Ultra at 40:1 in my engines once broken in. Perhaps they buy a base oil from a major supplier and then add whatever ingredients that they think is best. I think I read somewhere that Stihl oil is produced by Castrol. I do know that just because you read it somewhere (especially on the internet) doesn't make it true.
Posted on: 5/16/2013 9:34 AM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11513249

RE: landing bounce
A lot of interesting comments. I hope to test fly the plane possibly next Wednesday if he brings it. The more I think about it the more I suspect his bounce is due to his flying technique. I mentioned in post #5 that he tends to land long, usually in the last third of the runway. Our runway is 600+ feet with the pilot stations at mid point. The plane thus glides past his position and is going away from him. He can see that he is running out of runway and therefore may be anxious and forces the plane down which may cause the bounces. The whole problem may be he waits far too long to reduce power and thus has too much speed at the approach end of the runway. The plane must then "float" for quite a ways to bleed off speed. Anyway, that is one possibility. Mike
Posted on: 9/16/2012 4:46 AM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11229822

RE: landing bounce
High Plains: The runway is paved, no grass. Over the past couple of years I have gotten away from glow and now mostly have gas (20cc to 55cc engines). I still have 3 planes powered by Saito 4 strokes though. One of them is the Hangar 9 Pulse 60 XT powered by a Saito 100. I've never had any bounce issues with that plane. The guy with the 4*40 usually comes out to the field on Wednesdays. He does not bring it out every time but the next time he has it I will offer to test fly it and see if I have any bounce issues with it. I'll post the results if he wishes me to check it out. As I mentioned before, I've had models that tend to bounce and others that stick to the runway like glue. Since my landing technique is pretty consistent I was wondering what was the cause of the bounce. From the responses here, it appears the answer is not clear cut as several things may be at play. I appreciate the discussion. Mike
Posted on: 9/14/2012 8:57 PM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11228944

RE: landing bounce
[quote]ORIGINAL: Top_Gunn [quote]As jester mentioned and I forgot to describe, his landing are of the bounce type. His plane will usually bounce back up into the air 2 or 3 times before staying on the ground. It sort of looks like his gear has springs on them. This may suggest he is touching down with too much airspeed but it doesn't look like the plane is going that fast. [/quote] Airspeed won't make you bounce, it's descending too fast that will do it. If the problem isn't CG/gear placement, it could be that he's trying to fight the plane's tendency to float by giving it down elevator at the last minute. Doing that just a little will get you a bounce, and it's hard for beginners to resist the urge. (Doing it a lot will get you a busted prop or worse.) [/quote] Top_Gunn My thinking was with enough airspeed and AOA a plane will lift. So, if the AOA at touchdown is positive any excessive airspeed will take the plane back up unless held with down elevator. I do agree descending too fast will cause a bounce, similar to what a basketball does when you drop it to the floor. If I test his plane and can land it without bouncing, then we will know the problem is his technique. If I bounce it, then we will look at CG, landing gear placement, and maybe going to the "low bounce" tires sold by Dubro or Sullivan. Mike
Posted on: 9/14/2012 12:03 PM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11228526

RE: landing bounce
As jester mentioned and I forgot to describe, his landing are of the bounce type. His plane will usually bounce back up into the air 2 or 3 times before staying on the ground. It sort of looks like his gear has springs on them. This may suggest he is touching down with too much airspeed but it doesn't look like the plane is going that fast. A lot of the guys ask me to test fly their planes for them as I am one of the more experienced pilots in the club. I think I will ask this guy if he would like me to test fly the plane to see if it bounces when I land it. I'm not trying to brag but I'll say that if a plane is flyable, I can handle it. I haven't crashed anyone's plane that has asked me to do the maiden flight and that has been at least 30+ planes. For me, the landing is the most fun phase of flying and I take great pride in making a good landing. Mike
Posted on: 9/14/2012 8:43 AM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11228351

RE: landing bounce
I don't know if his 4*40 is a kit or ARF. It is a black fuselage with yellow wings. Don't know if ARF's came with that color scheme or not. Also, it is electric powered. I've never seen him fly anything but electric power. Next time I see him I'll ask about how he has the plane balanced and will suggest moving the CG forward a bit. Mike
Posted on: 9/13/2012 9:38 PM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11227966

RE: landing bounce
Thanks for the replies. This guy did say that his 4*40 had a tendency to "float". I watched him land several times and he touched down at about the last third of the runway each time. And sure enough, each time the plane bounced back up into the air. However, it looked to me that the landing speed was quite slow at the time of touchdown. If he changes the CG to make the plane at bit more nose heavy, could that solve the problem? I don't think the problem is simply too much speed at landing although I can see where too much speed can cause the plane to become airborne again. His landing speed is slower than some of the other planes and they are not bouncing back up in the air. Mike
Posted on: 9/13/2012 3:31 PM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11227637

landing bounce
A guy at our field has a 4Star-40 plane (tail dragger). It would bounce back up into the air every time he attempted to land and didn't seem to matter if it was a fast or slow speed at point of touchdown. I've had many planes over the years and thinking back, some seemed to stick to the runway at touchdown and others had a tendency to bounce back up into the air. So, what causes this bouncing with some planes. I have seen both nose gear and tail draggers do this. I'm thinking it has something to do with wing incidence but I'm just guessing. Could it be due to the particular wheels that are on the model? Landing speed? Explanation please. Mike
Posted on: 9/13/2012 1:00 PM by Author "Indiomike" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11227487

RE: Larger Revolver
[quote]ORIGINAL: wjcalhoun Hi Mike I will prop her with a 15x10 next time out; i don't have a Xoar in that pitch, so will have to use an APC. I was surprised with the difference in flying character. My only concern about the 10pitch prop is whether she will slow enough to settle for landing. My idle is about 1700 which translates to about 16 mph - just about flying speed for my plane. There is always the ignition kill if she wont land [&o] [/quote] I think a Xoar 15x10 will be much lighter than the APC. I have two of the 15x10 props but haven't tried them yet. The Zoar in that size is a bit hard to find. I got mine from here. http://www.justmodelprops.com
Posted on: 8/22/2012 3:51 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11202545

RE: What Airplanes are you Installing a Mintor22cc gas engine in?
Hey Capt'n My Mintor 22 is in a 70" Revolver. I had installed a DLE 20 but I changed it over to the Mintor. I have not flown this plane yet as it is too bloom'n hot where I live. It's 3:20pm and is 122 degrees on my patio thermometer (in the shade). I may not fly this for another month or so. When the temps get down to 100 or less I'll take it out to fly. I have no linkage set on the choke. I can reach inside with a long blade phillips and pull the choke back until it locks to the throttle arm. Mike
Posted on: 8/12/2012 3:28 PM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11190711

RE: Mintor 22cc
Capt'n Can you do a close up on the throttle linkage. I really can't see anything on the photo you posted. Thanks Mike
Posted on: 8/9/2012 10:07 AM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11187040

RE: Recommended Throttle servo for a 30cc engine
For me, the higher the money investment I have in a plane will in turn cause me to use higher quality components such as hardware, servos, etc. Even though high end components can fail, I just don't feel comfortable risking a high dollar plane with cheap gear. I wouldn't put $125.00 servos in a .40 trainer and I wouldn't put $25.00 servos in a $1,500.00 plane. That's how I look at it.
Posted on: 7/31/2012 6:36 AM by Author "Indiomike" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11175750

RE: Larger Revolver
[quote]ORIGINAL: microdon2 Indiomike - that Mintor is a nice-looking engine. Is it much more expensive than the DLE 20? btw - I think you can attach more than one pic - you just might have to repeat the attach process in the same entry. [/quote] Microdon The Mintor was $248.00 delivered which was less than the DLE 20. It can be bought from either Top Dawg Aviation or Chief Aircraft. It weighs
Posted on: 7/30/2012 4:55 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11175124

RE: Larger Revolver
Throttle servo moved from engine box to behind wing tube.
Posted on: 7/30/2012 11:08 AM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11174647

RE: Larger Revolver
Photo #4
Posted on: 7/30/2012 11:06 AM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11174646

RE: Larger Revolver
I don't know why I can't put more than one photo in a reply. Here is #3 out of 5.
Posted on: 7/30/2012 11:03 AM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11174642

RE: Larger Revolver
photo #2
Posted on: 7/30/2012 11:01 AM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11174640

RE: Larger Revolver
The Mintor 22 is installed. Here are some photos.
Posted on: 7/30/2012 10:59 AM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11174639

RE: Larger Revolver
[quote]ORIGINAL: Luchnia [quote]ORIGINAL: microdon2 IndioMike - Was the DLE 20 not enough engine for your Rev 70? [/quote] +1 - something you did not like about the DLE 20? [/quote] LOL. The DLE20 is plenty for this plane. This particular DLE20 has been giving me trouble. I bought it new and it has never run to my liking. It has a tendency to quit on me during flight. Top end is fine and it seems
Posted on: 7/25/2012 5:47 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11169289

RE: Larger Revolver
All my gassers 20cc to 55cc have A123 batteries for receiver/servos. I've never had any issues with my servos being powered at 6.6 volts. I always use a 4.8 battery for the ignition. Some guys like to use just one battery and feed the receiver and ignition with a regulator or diode reducer but I'm of the opinion that in a 9+ pound plane, the extra weight of an ignition battery is not enough to worry about. For my .60 size or less glow engines, I've been happy with a regular 4.8 Nicad or NiMH battery. Update on my Revolver. I ordered and just received the Mintor 22 engine. I will be removing the DLE20 and go with the Mintor. I'm going to have to move the throttle servo from the engine box back into the fuselage somewhere but that is no big deal. On the Mintor, the carb sits vertical in line with the cylinder but on the DLE it is canted off from the cylinder. It would be difficult to make a throttle linkage from throttle to servo if the servo is attached to the engine box. I'm in no particular hurry to finish the Revolver because right now it is just about too hot to want to take a plane to the field. I may not test fly the Revolver until the Summer heat begins to drop off. So I may not maiden this plane until September. Every day is about 110 degrees plus where I live. There are very few members going to the field here this time of year. Mike
Posted on: 7/24/2012 9:14 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11168162

RE: Larger Revolver
All of my gassers utilize a 2 battery system. I run a 4.8 volt 2000 mAh Eneloop battery for the ignition and a 2300 2S 6.6 volt A123 battery for the receiver. Some guys will run both receiver and ignition on one battery source but I prefer the 2 battery system. On planes that weight about ten pounds or over, the weight of the extra battery isn't a big deal. My 55cc plane (Aeroworks 260 Extra) utilizes Hitec 7955 TG servos on all surfaces (not on throttle). That starts to get expensive though at about $100.00 each (5). My 30cc plane uses only one 7955TG which is on the pull pull rudder. I think the Revolver can get by with a bit less powerful servo and therefore it has 985's all around. I have moved my ignition battery back up to the side of the engine box. The plane was too tail heavy with it mounted behind the rudder servo. The plane is ready to maiden. However, I live in the Coachella Valley (near Palm Springs) and it is very hot here now. My temp. gauge on the patio hit 120 yesterday and it will be that hot or hotter today. That's measured in the shade to boot. it is just too uncomfortable for me to fly right now. I know, I'm a whuss. Mike
Posted on: 7/10/2012 12:24 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11150235

RE: Larger Revolver
One method of checking CG when I don't have someone to help out is to use a string. Using the suggested CG location (5 1/2" in this case) I mark a small ink dot on the top of each wing right next to the fuselage at the CG point. The string goes down one side of the fuselage, across the bottom, and up the other side. It is then captured as the wings are slid in over the wing tubes. Then by holding both ends of the string together I can lift the plane up and see if it is balanced or not. It is a similar method that Aeroworks uses and supply's with their some of their ARFs. They call it a balance buddy. I personally prefer a slightly aft CG on my planes. But as you suggested, I will start out at the recommended point and go from there. Mike
Posted on: 7/9/2012 8:42 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11149505

RE: Larger Revolver
I was making a CG check on the plane. The manual says the CG is 5 1/2 inches back from the wing leading edge against the fuselage. By my measurements that puts the CG just about right at the leading edge of the wing tube. Then if you were to locate that point out to the end of the wing, it would be just about at the forward tip or maybe a 1/4 inch from the leading edge curve at the tip. Do you guys agree with that? If you put a guy at each wing tip and lifted the plane, the CG balance point would require a finger to be placed just barely behind the leading edge at the wingtip. Yes or no? Mike
Posted on: 7/9/2012 3:18 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11149134

RE: Larger Revolver
Orthobird Indeed it is sad to lose a plane on the maiden flight. I looked up the specs on the DS 8231 and saw it gives 88 oz. torque on 4.8 volts. and 113 oz. on 6.0 volts plus being plastic gears. Of all the control surfaces, the rudder needs to have your strongest servo. I fly giant scale gassers. My 30cc plane and 55cc plane both have Hitec 7955TG servos which gives 333 oz. of torque at 6.0 volts. My Revolver which is powered by a DLE20 has metal gear Hitec 985GM servo for the rudder and gives 172 oz. at 6.0 volts Whichever brand servo you like should be fine but have at least 150 oz. of torque for the rudder. I think when you get into planes larger than 60 size, you need to step up in the power and quality of the servos you use. You are correct in thinking a plastic gear servo for rudder in a plane this size is inadequate. Get the strongest ones you can afford. Mike
Posted on: 7/8/2012 10:02 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11148275

RE: Larger Revolver
Last one
Posted on: 7/8/2012 1:24 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11147734

RE: Larger Revolver
Almost done
Posted on: 7/8/2012 1:15 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11147724

RE: Larger Revolver
Three to go.
Posted on: 7/8/2012 12:23 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11147671

RE: Larger Revolver
More to come.
Posted on: 7/8/2012 12:20 PM by Author "Indiomike" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11147669