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This is the GWS motor and gearset being used most commonly for E36. It is the GWS IPS-RLC-1. This is a 4.8 volt motor with a 4:1 gear set. It comes with a black spinner. The prop used is normally a GWS 8×6 EP. This is an orange prop. The hole in the prop matches the shaft size of the gear. 3 mm.
My timer info is at
http://texastimers.com/timer_news.htm
BP Hobbies is used by many. This is the former Balsa Products that has been around for a long time. I have heard they are out of single motors, but have two in parallel in stock. Most of us bought this anyway. Just unsolder the wires. This is the RLC motor for 4.8 volts.
http://www.bphobbies.com/view.asp?id=V815101
Thanks for the info. So you just remove the extra motor and use the set that way? Also who supplies your batteries?
I have really developed an interest in electric since my first, an e-power Twin Lizzie was a success. The motor on that one was a little bit of a problem because to use it an assembly of the gear set with brass tubing and epoxy was necessary. Just does not fill me with confidence in it’s long term durability not to mention there was not a very good solution available for mounting it in the airplane. Although, I do have an idea for the next one. Might as well use it since I have it and it does provide sufficient power.
Looking forward to the release of that mechanical electric motor timer. That direction was the first though in my mind when discussions began about how to time electrics. Just made sense.
David
I perhaps was not very clear. The two motors are just motors. No gears. I assume they are some sort of replacement item for a two engine plane. The only thing you get are two motors that are wired in parallel. Easy to unsolder the wires to separate the motors.
Then, you still need to order the LPS gear box with the 4:1 gears. The two motors come with pinion gears installed so they are ready to slide into the LPS gear box.
I have a motor like you describe with brass tubing epoyied to the case to hold the shaft for the main gear. Have not used it, but it seems OK. Until the first nose in crash. Course, you are going to bend the shaft on the LPS too, so order some spare shafts. Pretty low cost.
To be honest, I do not remember where I bought my N190 Sanyos. It was an internet place in Dayton, OH. RC something. Maybe I can find my charge slip?
190ma cells can be purchased from SR Batteries here:
http://www.srbatteries.com/elecpks.htm
I highly recomend them, the cells are matched. I have had good success with them.
Along with P.B. Hobbies this is another good source for GWS products:
http://www.allerc.com/LPSRLC.htm
I ordered from them last week and they had motors in stock.Most of these I’ve looked at have an A or B or C model. Maybe I’m not paying enough attention to the charts but what is the difference in them? Also what is the difference between the IPS and LPS motors?
It would sure nice if all the motors could be standardized as to power output when compared to glow engines when using the recommended
battery packs.
The difference in A,B, & C are the gear ratio’s. The difference in IPS and LPS are 3 fold. LPS mounts on a rectangular stick and has a 3mm prop shaft and weighs a llilte more than the IPS which mounts on a round stick and has a 2mm prop shaft. Both units use the same motor. The motor is key. Both units are offered as 7.2v or 4.8v in all three gear ratios. Make sure you get a 4.8v motor for E-36. You can play with gear ratios and prop sizes all you want, but you must use a 4.8v motor or the performance will suffer.
To a large extent electric motors are catagorized and can be referenced to a gas equilivant. The options in electric flight are changing so fast that the only people that can keep up with them are the people that are marketing them. You will not find a glow equilivant for E-36. It is closer to CO2 than Gas. I am sure that you will get other responses to this question, this forum is a great resource.I will add my bit of mis information. The LPS is ball bearing and the IPS is not. In LPS you only have a choice of three gear ratios. I think the B is 4:1 which is what I hear being used the most often. The pinion with the dual motors at BP matches the 4:1 gear. You may want to pick up pinions and spur gears for the others. In IPS you have many more gear ratios to pick from. One is way up at 11:1. But, you need matching pinion and spurs. Gets to be a lot of part to sort through.
Now, JIm can correct me.
Sorry Hank, but the IPSD twin motor systems have 4 different pinion sizes: 9T, 10T, 12T and 14T. I do not know what the pinion tooth count on the IPS 4:1 is, but the LPS has a 48 tooth spur and a 12 tooth pinion. BP has a sale on the IPSD S2 3.5:1 for $8.00.
http://www.bphobbies.com/view.asp?id=V563439&pid=S592984
but it has a 16 tooth spur. How many teeth does your IPS pinion have? If you have a 16 tooth pinion you could pick up 2 extra motors with pinions, bearings and prop nuts for $8.00. If your pinion is 12T like the LPS you will have to pay $12.84.
http://www.bphobbies.com/view.asp?id=V563439&pid=S719836
Or you can just buy a LPS ready to fly for $13.13
http://www.allerc.com/product_info.php?cPath=26_53&products_id=1100
The LPS does have bearings. I just took one apart. Buy them here:
http://www.allerc.com/index.php?cPath=26_53
Have I convinced you to switch to an LPS yet? The only good argument is the larger prop shaft on the IPS. Out of all of those IPS options only one of them has a 4.8v motor and they seem to be difficult to get. The LPS and it’s parts are readily available. Did I mention that it is lighter? 8)Gonna have to dig out the GWS packages. I have the LPS box, not the IPS. And to the best of my knowledge, the dual motors I got have the corrrect pinion for the LPS box. Don’t own any IPS far as I know. I bought it all from BP Hobbies.
I am well aware of the different pinions in the IPS. Did I not say that?
Did I mis phrase something?
Shucky darn, Jim. All my stuff is IPS as you said. My pinions are all 14T. The spur gear gives 4.1:1. Now I gotto go get a pinion puller and new pinions, as well as new gear boxes. About all I can say is I do have the corrrct RLC 4.8 motor. In reality, GWS calls it a 2. something motor in some of their literature. I can still fly with what I have, but the LPS with ball bearings is liikely a better choice. Wonder why they made the shaft thinner?
Like I said, this is getting to be alphabet soup.
Thanks for kicking me in the head to wake me up.
Jim, a good deal is to buy the dual IPS set up from BP and gut out the two motors. Then just replace the pinions for the LPS. After all two good motors for $8.
Do the rules specifically disallow the dual motors? Look at the data. You can get 180 grams of thrust. That would take an E36 up real smartly.
When I bought my motors BP was selling just the dual motors without the dual gear box. Same price of $8.
The dual motors question was the first question I had for Vic. He said no. I agree, it would be the hottest setup that I know of. It would level the playing field from a power standpoint and give E-36 the performance it needs. I have tested every combination of motor both direct drive and geared that I can find that is commercialy available and the GWS LPS & IPS 4:1 motors are the best off the shelf option IMHO. I would like to see fliers able to get “best options” off the shelf. I think that we will have a higher level of particapation if we take as much of the “mystery” out of electric flight as we can.
Hank, you started this string, and IMHO it is one of the most important topics in the forum. This is where most people need help. We have put a lot of good information out there under other headings. I would like to find a way to bring it all back to this string. What do you think?Ok Jim and Hank..now you have me shacking my head in confusion ! I have read everything you two have been talking about of the GWS motors.
So. as a new comer perhaps interested in getting into the E-36 what is the conclusiion to start out with (which mortor, design plane, what kind of timer ,what type of speed control and etc.
) espically
for someone who knows nothing of electronics.Thanks…Craig
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