Search found 48 matches

by helno
Nov 27 2018 12:07pm
Forum: Electric Aircraft
Topic: Finally started my electric aircraft build
Replies: 10
Views: 575

Re: Finally started my electric aircraft build

Here are some big ones.

http://www.icare-rc.com/propellers_folding.htm

Biggest one on there is a 34.2" x 22.5" three blade unit.

Folding is nice if the plan is to shut down the engines but just stopping the prop cuts down on drag quite a bit.
by helno
Nov 25 2018 12:10pm
Forum: Electric Aircraft
Topic: Finally started my electric aircraft build
Replies: 10
Views: 575

Re: Finally started my electric aircraft build

It is an aerobatic motorglider rather than a nice clean design. https://imgur.com/OkUHaux It has constraints on propeller diameter with a forward mounted engine so I am thinking that distributed would take care of that rather than having a single really inefficient prop on the nose. And if I go with...
by helno
Nov 18 2018 7:26pm
Forum: Electric Aircraft
Topic: Finally started my electric aircraft build
Replies: 10
Views: 575

Re: Finally started my electric aircraft build

I'm really interesting in how you make out with the distributed propulsion.

Might be a better option for the MONI motorglider I am looking to convert.
by helno
Nov 05 2018 10:24pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

Great to see this project flying!
by helno
Jul 06 2018 7:11pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

Get some electronic flight bag software and do the same thing. You will need it afterwards anyways.

Fltplan GO is free and there are a few others that are as well. The premium software like Foreflight is better but that is mostly in the UI department.
by helno
Jul 06 2018 12:10pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

Simulators are actually really bad at teaching you the stick ad rudder skills needed to fly light aircraft.

They are great once you get to instrument flying but there is nothing that beats the seat of the pants feel for learning to fly.
by helno
Mar 11 2018 2:28pm
Forum: Items for Sale - Used
Topic: e-trike powertrain agni 95R with kokam 3.9kWh li-po
Replies: 2
Views: 602

Re: e-trike powertrain agni 95R with kokam 3.9kWh li-po

What kind of performance were you getting out of it?

I'm looking at 20+ Kw for a Moni motorglider. I know they have flown on a 95R but it appears to be pretty marginal.
by helno
Jan 02 2018 6:16pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

Pipistrel makes a nice plane.

They are selling them up here in Canada already.

Unfortunately the LSA rules specifically say that an LSA must have a single reciprocating engine. Someone was a bit shortsighted when they wrote that rule.
by helno
Dec 13 2017 6:50pm
Forum: Electric Aircraft
Topic: E-Hawk: Electric Aircraft Build
Replies: 1
Views: 653

Re: E-Hawk: Electric Aircraft Build

I thought the guys behind the EMG had a motor planned out.

You could always use a pair of Turnigy rotomax's but be sure to get the voltage up.
by helno
Nov 14 2017 9:07pm
Forum: Electric Aircraft
Topic: DIY ultralight, Retro biplane style, twinprop
Replies: 8
Views: 1528

Re: DIY ultralight, Retro biplane style, twinprop

It will be interesting to see his in flight power measurements once he adds the instrumentation.
by helno
Oct 27 2017 7:34pm
Forum: Electric Aircraft
Topic: DIY ultralight, Retro biplane style, twinprop
Replies: 8
Views: 1528

Re: DIY ultralight, Retro biplane style, twinprop

He doesn't have enough power with those engines stock wind. The same ones were used a while back on a Lazair ultralight and they were marginal even after being rewound for more power. The Lazair is a really light aircraft with a huge wing area so it has very low power requirements. It is an interest...
by helno
Oct 06 2017 8:43am
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

craneplaneguy wrote:So while I had my head down looking at my feet I revved it up to load up the brakes and being a total newbie forgot to hold the stick back.....and up on the nose I went :evil:
Stick in your gut no matter what.

That Stratomaster looks good in your panel Farfle.
by helno
Jul 30 2017 5:50pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 270
Views: 25806

Re: N.E.S.E. the no solder module

I would stick with 3d printing for now but I would also find some way to reduce the hardware costs. Modularity is great but if I am paying the full price when I want a smaller module then the value gets lost. I have to say I was totally on board until you opened your store and I saw the retail price...
by helno
Jul 30 2017 3:34pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 270
Views: 25806

Re: N.E.S.E. the no solder module

As far as tooling goes you would decide what size is going to be the most common and make a mold for that. If you make a 6p enclosure the user does not need to install 6 cells if they want a smaller battery. I can tell you right now the price is what kept me away, and I have the 3d printer to make t...
by helno
Jul 30 2017 1:38pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 270
Views: 25806

Re: N.E.S.E. the no solder module

Going back to the injection molding discussion I have very recently turned a 3d printable design into an injection molded product. We did it because as you have found 3d printing is cheap for a prototype but is not capable of scaling up economically. The break even point in cost is around 1000 units...
by helno
Jul 16 2017 8:47pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31017

Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Finally got to do my first brief ride with this working today. It is shocking just how fast 500 watts will push a road bike. Probably going to tone that down to 200 watts or so to get some decent range. Still need to tweak the mounting a bit. Pushbutton throttle works but the 1000 microfarad cap tak...
by helno
Jun 28 2017 11:00am
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

I suspect you will be able to push that motor pretty hard with the massive amount of air cooling available.

I have seen it fly on an Earthstar Thundergull which is a much bigger and heavier plane. The Belite is likely half the weight.
by helno
Jun 28 2017 8:55am
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

The combined airspeed and altimeter were all I ever needed. Getting a low range airspeed indicator is important for aircraft like this since accuracy at the bottom of the scale is more important than at the top of it. The Stratomaster I have (its sitting on a shelf if you are interested in buying it...
by helno
Jun 27 2017 9:51pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

The downside of course is that you are always flying around with full tanks as far as W+B goes. It is less of a problem in a single seat plane but I rarely fill the tanks in my Cherokee because it limits what you can carry and slows you down when you don't need it. You have quite a bit going on in t...
by helno
Jun 24 2017 7:06pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

It should be OK. However the term "Dry weight" is being with modules removed if need be. Just be careful with "dry weight". Dale Kramer went that way with his electric Lazair (he as going to sell them so ensuring legal compliance was a necessity.) His opinion that the battery was fuel was allowed b...
by helno
Jun 24 2017 11:00am
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 196
Views: 18335

Re: Farfles Electric Ultralight.

How is your weight budget looking? Far 103 is pretty strict with that 254 lb limit.

Looks like it will have tons of power. Belite makes neat little planes.
by helno
Jun 21 2017 9:21pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 8
Views: 1488

Re: Converting a MONI motor glider to electric

If done properly and isolation is incorporated into the design, you can safely manage up to 1000 volts without any exotic components. I work on high voltage equipment for a living. I get to climb inside and inspect the hydrogen seals on 24 kv bushings about twice a year. The neutral point on our ge...
by helno
Jun 20 2017 10:15pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 8
Views: 1488

Re: Converting a MONI motor glider to electric

Anything over 50 volts at these power levels is lethal. Perhaps it is just because in the field I work in lower current is always preferred over lower voltage. Any load over 200 hp jumps from 600 VAC to 4160 to keep the fault currents manageable. Heavy gauge wiring aside it just seems that a lower c...
by helno
Jun 20 2017 8:09pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 8
Views: 1488

Re: Converting a MONI motor glider to electric

I am looking at the high voltage versions of the motor because it puts me in the sweet spot for the target RPM. The lower voltage windings want to spin much faster to make rated power. I'd like to keep it direct drive for simplicity. The 30 kw figure would only be for takeoff and climbout would prob...
by helno
Jun 19 2017 8:53pm
Forum: Motor Technology
Topic: MOTOR PORN !! EMRAX 228 teardown !!
Replies: 27
Views: 6245

Re: MOTOR PORN !! EMRAX 228 teardown !!

I created a post in the electric airplane section so I don't futher sidetrack the discussion here.

https://endless-sphere.com/forums/viewt ... 38&t=89000