Search found 77 matches

by helno
Feb 24 2021 1:59pm
Forum: Electric Aircraft
Topic: Battery pack selection for self-launching glider
Replies: 7
Views: 172

Re: Battery pack selection for self-launching glider

Since the extra capacity is not going to kill your weight budget why not go for a pack that doesn't get worked quite so hard. Sure the cells can handle 20C but doing that often will greatly reduce the lifespan. Make the 15 kg pack into two parts and it would be easy enough for someone to carry one m...
by helno
Feb 16 2021 10:42am
Forum: Alternative Energy
Topic: Gas turbine & antifreeze windmill startup, fire in the hole
Replies: 1
Views: 116

Re: Gas turbine & antifreeze windmill startup, fire in the hole

It is strange to hear about these wind farms having problems in the cold.

There are a ton running in Canada and they seem to do just fine in the winters here.
by helno
Feb 15 2021 7:27pm
Forum: Items for Sale - New
Topic: Cheap FOCer 2 kits (35A 12s VESC6 based design)
Replies: 5
Views: 578

Re: Cheap FOCer 2 kits (35A 12s VESC6 based design)

Do we have to order the preassembled kit to get the picture of samuel jackson on the back? Shaman on here is the one who did the design and the SLJ artwork. https://endless-sphere.com/forums/memberlist.php?mode=viewprofile&u=62507 It is actually pretty good practice for hand soldering a combo o...
by helno
Feb 14 2021 9:43pm
Forum: Items for Sale - New
Topic: Cheap FOCer 2 kits (35A 12s VESC6 based design)
Replies: 5
Views: 578

Re: Cheap FOCer 2 kits (35A 12s VESC6 based design)

I do and plan on ordering more once these are sold.
by helno
Jan 11 2021 3:08pm
Forum: Items for Sale - New
Topic: Cheap FOCer 2 kits (35A 12s VESC6 based design)
Replies: 5
Views: 578

Re: Cheap FOCer 2 kits (35A 12s VESC6 based design)

Still have a few of these left.
by helno
Dec 01 2020 8:24am
Forum: Items Wanted
Topic: Wanted: Kepler bottom bracket friction drive
Replies: 1
Views: 254

Re: Wanted: Kepler bottom bracket friction drive

I have one I am no longer using.

It is missing the gravity spring.
by helno
Nov 10 2020 5:43pm
Forum: Items for Sale - New
Topic: Cheap FOCer 2 kits (35A 12s VESC6 based design)
Replies: 5
Views: 578

Cheap FOCer 2 kits (35A 12s VESC6 based design)

Time to sell some Cheap FOCER 2 V1.0's For more details here is the development thread for this VESC6 compatible electronic speed controller. It was developed buy a member here. https://endless-sphere.com/forums/viewtopic.php?f=30&t=103465 https://forum.esk8.news/t/cheap-focer-2-open-source-low-...
by helno
Nov 10 2020 10:10am
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

Do you have a detailed W&B from the original builder? If you need a copy of the sheet to do the math I have the forms from the factory. There is a lot of dead weight on the front end of a Moni since it was originally intended for a larger motor. The ballast in mine weighs more than the motor and...
by helno
Oct 22 2020 7:25am
Forum: Electric Aircraft
Topic: Self-launching sailplane conversion
Replies: 23
Views: 972

Re: Self-launching sailplane conversion

There are plenty intended for R/C motor and prop selection that will do the trick.
by helno
Oct 21 2020 10:55am
Forum: Electric Aircraft
Topic: Self-launching sailplane conversion
Replies: 23
Views: 972

Re: Self-launching sailplane conversion

You could just measure the current thrust and that gives you a starting point.

One thing you will need to take into account is the thrust available at the speed you climb at. A paramotor is all about static thrust but a glider will be moving quite a bit faster while climbing.
by helno
Oct 21 2020 7:35am
Forum: Electric Aircraft
Topic: Self-launching sailplane conversion
Replies: 23
Views: 972

Re: Self-launching sailplane conversion

You should look at some of the electric paramotor drives people have worked out.

They have similar prop size constraints and power requirements.

https://openppg.com/shop/paramotors/openppg-sp140/
by helno
Oct 10 2020 9:53pm
Forum: Electric Aircraft
Topic: Electric Ultralight
Replies: 3
Views: 1895

Re: Electric Ultralight

Other than the seating position the GOAT and Lazair are very different airframes built using different methods.
by helno
Oct 06 2020 8:44am
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

Munro claims the new Tesla battery will reduce the battery weight in half. Half the empty weight of this aircraft is still to much to allow it to fly. This is a conversion it is not a new build. The power system has to work with the weight and balance as is. Luckily the original airframe had a larg...
by helno
Oct 03 2020 12:03pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

40 kwhr of batteries would weigh more than the empty weight of this aircraft.
by helno
Oct 01 2020 12:54pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

Have fun with that. Hope you have some automated welder to do 12000 spot welds. I am using volt cells as I need power density rather than energy density. I want a pack that is as light as possible to fit the existing airframe while being able to handle the peak power demands. Climb power is more imp...
by helno
Sep 07 2020 10:37pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 238
Views: 42817

Re: Farfles Electric Ultralight.

That is some really shitty news to hear. I helped him with the instrument panel.

Two-strokes are not great power plants for aircraft.
by helno
Sep 07 2020 10:33pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

Shouldn't be too difficult welding 18650s with a tack welder? And using those plastic brackets to form the grids? Not that I have built this, but am planning to build. Let me know when you are ready to build a pack with 900 individual cells. Probably just going to buy a complete Chevy volt pack and...
by helno
May 12 2020 8:08pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 33
Views: 6608

Re: Converting a MONI motor glider to electric

amberwolf wrote:
May 12 2020 4:08pm
EIG NMC cells?
These are the prime candidate currently. Making a pack out of 900+ cells didn't really sound appealing.
by helno
May 12 2020 3:42pm
Forum: Electric Aircraft
Topic: motor glider project
Replies: 44
Views: 2613

Re: motor glider project

I'm still working on an EV conversion of a single seat motorglider. https://endless-sphere.com/forums/viewtopic.php?f=38&t=89000 Got a motor and ESC but am still working on a battery. A Zero motorcycle battery would probably be perfect but there are not many in Canada so not many available on th...
by helno
Dec 27 2019 5:51pm
Forum: Items for Sale - Used
Topic: Tesla 2170 Battery Cells 1-2-3 Kwh. United States
Replies: 2
Views: 1573

Re: Tesla 2170 Battery Cells 1-2-3 Kwh. United States

Curious to see how people are building packs with these since the positive terminal is lower than the negative ring surrounding it?

Might be interested in a several kwhr of them but have to figure out pack assembly and how to get them here.
by helno
Nov 05 2019 4:30pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 238
Views: 42817

Re: Farfles Electric Ultralight.

There is real irony of an electric airplane being converted to gas but good on you for building something, testing it and realising that it doesn't match your use case.

Got any plans for the electric drive train?
by helno
Jun 07 2019 5:52pm
Forum: EBike Non-hub Motor Drives
Topic: Dewalt powered mid drive road bike
Replies: 6
Views: 1458

Re: Dewalt powered mid drive road bike

StinkyGoalieGuy wrote:
May 29 2019 11:22pm
Very nice. So do you run the two packs in series? Do you use any kind of diode to isolate them in case the BMS trips on one of the batteries?
Missed this one.

No diode because they are in series. And they do not have a conventional BMS only a basic cell balancer.
by helno
Jun 04 2019 6:39pm
Forum: EBike Non-hub Motor Drives
Topic: Dewalt powered mid drive road bike
Replies: 6
Views: 1458

Re: Dewalt powered mid drive road bike

silentflight wrote:
May 30 2019 1:18pm
Maybe it was a type of nylon?
I used ABS. It is a pretty common material on bikes.
cheapcookie wrote:
May 30 2019 1:22pm
Nice, have you tried 3d printed ryobi/makita/milwaukee adapters ?
The Waitley adaptor will also accept Milwaukee M18 as well as the dewalt packs.
by helno
May 20 2019 2:35pm
Forum: EBike Non-hub Motor Drives
Topic: Dewalt powered mid drive road bike
Replies: 6
Views: 1458

Dewalt powered mid drive road bike

Decided to update my bicycle for this riding season. The bike is an old Miele road bike that has been upgraded over the years. The update consisted of removing a Kepler friction drive and replacing it with a Bafang BBS01. For a power source I wanted to use a pair of 5 Ah Dewalt 20 volt packs. The mi...
by helno
Feb 25 2019 5:38pm
Forum: Electric Aircraft
Topic: The E-Gull
Replies: 12
Views: 4123

Re: The E-Gull

I was always impressed by this setup at Oshkosh.

Outperforms just bout everything on the field. It is unfortunate that Zero's lawyers made it difficult for the designer to offer it as a ready to go kit.