... http://www.dailyrecord.com/article/20090111/COLUMNISTS22/901110367/100 5/ ... .....I saw a write up on using the iPhone in a Porsche 356 Registery, a...
I've been investigating various approaches to an ultralight assist. When I've touched my 300 gram S4020 motor after several minutes of continuous use it was...
... Smaller motors don't have as good efficiency as ... Hmm - Maxon motors range up to 90% ... If the ... 10% of maximum torque isn't what one would call...
Chris, Good to hear from you again! ... Which one are you suggesting? Are all Maxons inrunners? I haven't seriously considered inrunner motors as their Kv is...
... They have commutated brushed motors. An RE40 24V 7580 no load with an R of .317 Ohm. 317 rpm/V has an efficiency of 91%. Their gearboxes are 90% for one...
... an R of .317 Ohm. 317 rpm/V has an efficiency of 91%. That one seems to be slotless. Such designs have very high peak efficiency but seem to have limited...
I usually use the term gearbox as generic for all forms of speed reducers, SRs, but will differentiate here. I've been considering various possible approaches...
Elden, How about first stage of 5mm pitch (or even 3mm?) synchro belt and second stage of #25 chain? As you're not intending to use the motor on its own, you...
... I'm not sure I understand the problem here. SDP sells delrin gears for a few bucks each. For the large gear you can buy a cutter for $44 from KBC tool...
... I think a 2mm pitch GTS can be used for the first stage if a small motor is selected with 5000rpm minimum and current limiting. Adding chain and a...
... for a few bucks each. For the large gear you can buy a cutter for $44 from KBC tool and make one. The large gear can be plastic if wide enough, about...
Elden, et al: I think if we go to a higher voltage, higher speed, it makes sense to go to a three stage reduction. That's at least what I'm seeing for both a...
... to go to a ... Small motors are lightweight but have poorer efficiency. If another reduction stage is needed, the system efficiency is even lower so I ...
Eldon: ... I thought higher voltage was the start of this discussion? Higher voltage equates to higher speeds, and I believe current systems are stretching the...
I think I've found a very simple light way to build a system if the chainring is sufficiently large. I've been examining several different ways to build a...
Hi All, First post, loads of interesting ideas here-glad I found the list! I've been thinking for some time of building something rather like John's system and...
Welcome Arthur. I'd expected John to reply by now, but since he hasn't I'll try to answer some of your questions. If you haven't yet found it, John describes...
Hi Folks I'm back. Been very busy doing Art and having some great shows with a possibility of a big one coming up. I was shocked (pleasantly) by all the...
... Its made by IMS and they have salesin Gainsville Ga. 1-770- 840-9600. The gear box I used is P 32 19:1 ratio. I contacted them when I snapped of the output...
I noticed that the battery run time was very short even after being charged (Trickle) to something like 3 minutes. So I did some bench testing. My packs are...
Hmmmm... I wonder if super capacitor packs might be made trouble free and reliable for high numbers of charge/discharge cycles? How close are the best super...
Because their voltage is not constant, the electronics needed to use much of the capacity of super capacitors seems to mitigate against them. I've been...
... .......Those two batteries were not used very hard, so I'm a bit disappointed with their finikyness. I'll keep an eye on them to see how long they they...
I did a discharge run on one of my packs to se if there was any degration due to the cold. I did the test onmy porch at 30 F. Run time power the same as in...
... Is this the same battery that had become unbalanced over the winter and subsequently rebalanced? Did you have a data logger included? If so, how many...
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