RunRyder - Will 5S4P fit in Logo 10?

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e-Mikado Logo 400 500 600 > Will 5S4P fit in Logo 10?

cwd10
Veteran
Location: PA, - U.S.A.

Ok. Now I'm thinking 5S3P or 5S4P for my Logo 10 3D setup (they both cost $325 at Espirit). The 8S2P stuff is too expensive, and has too many hassles for my taste. Looking at Hacker C50-15L (or maybe similar Aveox), and 13 tooth. Will these batts fit in the 10 without any major problems? Will the 18.46k live for long durations at 80% to 85% gov. settings with this combo?

02-12-2004 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

Yes, a 5S4P pack will fit just fine. That's what I use right now. You will have to widen the lower section of the frame a bit, but it is pretty easy.

> The 8S2P stuff is too expensive, and has too many hassles for my
> taste

Huh? The battery would be cheaper (4 less cells) and an appropriate motor (B50-16XL) is the same as the C50 you mention. An appropriate ESC is the same or cheaper than the Schulze 18.46k you mention.

Hassle? What is the hassle of it?

I guess I can't agree with your conclusion on this topic. I would jump all over the HV setup if I was setting up my Logo 10 from fresh. There is just no comparison in performance capabilities.

Yes, the 18.46k will do just fine. It is a very nice ESC.

- John

02-12-2004 Over year old.

Dakine
Elite Veteran
Location: OC, Commifornia

Could your motor and speed controller handle 18.5 volts (5S4P, 18.5 v.)?

I'm currently running a 4S4P 8000mah Thunderpower.

02-12-2004 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

> Could your motor and speed controller handle 18.5 volts (5S4P, 18.5 v.)?

Yes, the 18.46k handles 5S just fine, no problem. And, yes, the C50-15L would be just fine with 5S.

Is that what you meant?

- John

02-12-2004 Over year old.

cwd10
Veteran
Location: PA, - U.S.A.

Thanks for the quick replies guys. Maybe I'm wrong here Jkos, but where are you finding 8S2P packs cheaper than 5S4P? The hassles I was talking about are : from what I'm told, the higher voltage packs are more dangerous, I was told the "XL" motors don't fit without mods, I'd have to get a different esc (which one?) for the higher voltage etc. Most of these issues mean more money. Like I said I could be wrong here, since I don't have any practical experience with these combos. I 'm just trying to plan for the best combination of cost, reliability, flexability and safety.

02-12-2004 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

Call TP and they will build you an 8S2P pack or two 4S2P packs. It will be cheaper since there are less cells involved.

In what way were you told that an 8S config would be more dangerous than a 5S config?

The B50-XL motors are the same diameter (35.8 mm) but just a little longer than the B50-L motors (74 mm vs 60 mm). Should fit w/o mods. The C50-15L is 43.2 mm in diameter and 60.5 mm long. Both motors are available for $230.

> a different esc (which one?)

The Hacker 48-3P would be good choice. Goes for around $180 new.

- John

02-12-2004 Over year old.

rchaas
Senior Heliman
Location: Tulsa, OK

As one who uses 8s2p, i'd agree with John. I am using the Hacker 48 3P opto, no mods required to fit the motor or battery in the heli, and no problems so far charging or flying with this setup. I did have to grind down the removable heat sink on the sides, to fit w/in the frame, o/w, nothing special required. You can see a pic of that in the gallery.

However, for a stock B50-16xl motor, the smallest pinion is 13 tooth, unless you want to turn the shaft down to 5mm so you can use smaller gears. With a 13 tooth pinion, i turn 1900 rpm in the hover, but the heli really flies great with this combo, so i have no plans for trying smaller pinions.

If you are a beginning flyer, that kind of headspeed might be a bit much, but for aerobatic flying, its perfect!

Robbie

02-12-2004 Over year old.

cwd10
Veteran
Location: PA, - U.S.A.

Hey rchaas. That sounds like a good combo. One question though. You said " I turn 1900 rpm in the hover". What is your governor set at, when in the hover? What's the diff between the B50-16XL, and the C50-16XL?

02-13-2004 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

He has the governor set to 1900 RPM. It maintains that head speed as well as the motor/battery/gearing physically can.

The B50-16XL and C50-16XL do not have the same motor constants and, therefore, cannot simply be interchanged. Here is quick comparison:

Code
Motor RPM/v Io Rm (mOhm) Weight (g) B50-16XL 986 0.77 31.3 312 C50-16XL 1050 0.77 31.3 419 C50-17XL 988 0.73 36.2 419

The two 16s are close, but the C50-16XL will give you a higher potential head speed then the B50-16XL at the same gearing. Looks like the C50-17XL would be a better match but it would possibly bog a bit more due to the higher Rm.

Well, ok, the 16s are probably close enough that everything would work out fine.

- John

02-13-2004 Over year old.

cwd10
Veteran
Location: PA, - U.S.A.

Bog a bit more due to the higher rpm? It looks like the 17 uses a lower rpm. Well let's see. Theoretically, we are dereasing speed with gearing, thus gaining torque. The faster the motor spins, and the more you reduce the final output speed with gearing, the more torque you gain. The best way to keep good torque would be to use a faster motor with the lower gear, if the motor can take it. That's why the C50-16XL looks to be about right. Then you could use the governor to slow it down for the light stuff. Right?

02-13-2004 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

All other things being equal, a motor with a higher internal resistance (Rm) will bog more under load than a motor with a lower internal resistance. Thus, the C50-17XL would bog more easily than the B50-16XL.

The C50-16XL should work fine with an 8S2P setup. It is 3.8 oz heavier than the B50-16XL, however. Yes, it has the built in heatsink area and higher temp magnets; and, I guess that difference in weight won't matter much with an 8S2P power plant.

- John

02-13-2004 Over year old.

cwd10
Veteran
Location: PA, - U.S.A.

Well said Jkos. You da mann. Well, ok. I guess I'm going to do a little more thinking on this. The 8S2P setup is very tempting, but costly.

I would like to approach this in an intelligent way, and not waste a bunch of money (who wouldn't). It looks like going 8S2P would be more cost effective in the long run, but money will be tight in the near future so I'm trying to keep my initial costs down. Sheesh, this is frustrating. Maybe I'll just save a bunch of money and buy the Reflex simulator, and wait on the logo for a while.

02-13-2004 Over year old.

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e-Mikado Logo 400 500 600 > Will 5S4P fit in Logo 10?

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