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TOPIC: Wannabeaflyers Eppg Dream

Wannabeaflyers Eppg Dream 8 months 5 days ago #52

Hi Guys will use this topic to post info on my adventures during my quest for a launch assist EPPG unit , the initial aim will be create a EPPG unit based on to the collection of parts I have acquired over the years, and all the time learning from the members here on this forum and net sourced inspiration ..
I Take no credit for any designs I create, and freely admit they tend to be variations on the work that other guys have pioneered , I like to consider my concepts as re-configured ideas I have gathered from the net , and Projects built mainly using tools and equipment I have access to or the build design tweaked to something I can make ..
Ok enough talk from time to time I will post Cad drawing and Photos of my trials and testing in the hope of getting feedback which we all will benefit from ..

Recently during the time we lost access to this forum, I finally received my C12090 Motor with Hall sensor upgrade so am really looking forward to cutting metal to make the power unit mount .. and the cage frame using my Tube roller concept ...

I Also managed to power up and run my 1st EPPG design which was based on My C80100 Motor albeit using low power . Picture below show the Quick bench setup to allow me to spin her up using a small lipo and watt meter ( this was done to allow me to become familiar with the Wiring side of the EPPG setup..) much different from my motion platform Flight sim / Race car project :-)

Still waiting for some XT90 anti spark connectors and 10Awg Silicon cable so that I can configure my Lipo batteries for full on testing... baby steps at the moment and no magic smoke so im happy with these small steps

will start to give you guys better tech info once things get going properly , but just for now some happ hazard photos to let you guys know I will be sharing my project all the way ..Cheers

In My next post i'll attempt to outline the concept regarding the Provisional build Spec Bill of materials ... Motor / battery/ controller/prop/unit weight /build materials /Cad drawings & expected speed and any other tech spec ....im good at making stuff not so hot of the tech nitty gritty i.e real world performance requirements so that's where the combined info gathered here and elsewhere will be important ..
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Last Edit: by Wannabeaflyer.

Wannabeaflyers Eppg Dream 8 months 2 days ago #68

I am looking forward to follow your project. What is the KV value of your 12090 motor and what gear ratio do you plan to use?
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Wannabeaflyers Eppg Dream 8 months 1 day ago #71

HI Bo sorry for the delay , I measured the pulleys on the reduction drive gears and calculate the Ratio to be around 2.4:1 ish ..

My motor should be an 80KV unit , but wont know till I fire it up as I have had this brand new sitting in a box for the last 2+ years ... Bruno at Alien power systems will check my records and let me know ( I seem to recall asking him to change it from the 130Kv to 80Kv so that's where that came from)..either that or i'll do a back EMF test to see what value I get ..
Just trying the modified servo tester mod but not working so im checking my soldering again .. small steps .... but progress being made

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Wannabeaflyers Eppg Dream 8 months 18 hours ago #72

If you want to run a standard PPG prop with a 80kV motor and a 2.45:1 gear, you should probably run with 18S battery (66.6 volts). 12S (44,4 volts) won't cut it.
66,6 x 80 : 2,45 = 2175rpm. Even with 66,6 volt I actually think your rpm is a little lower. With a standard size PPG prop you should aim for about 2800rpm.

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Last Edit: by Gamba.

Wannabeaflyers Eppg Dream 7 months 4 weeks ago #73

Hi Bo just found an old email confirming that I had in fact ordered an 80KV unit ref Order: #114 12090 Outrunner brushless motor 80KV 18000W 1 £ 239.00 ...

Something crazy going on with posting as im sure I posted a quick reply yesterday asking you about cost of the E-one Kit and when it might be available , Also that post was a thank you regarding the Fact that I need to rethink the gearing to get the best out of this Motor..

Day off work today so some cad work at home and looking to upgrade my CNC router to make the support plates at home if I can. Cheers for the tips Good buddy they are all being used to good effect

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Wannabeaflyers Eppg Dream 7 months 4 weeks ago #74

There has been some delay on the Eone. It has been a challenge to find the smartest way to produce the 120 pulley. Today we got the last tool delivered. With a bit of luck, we have it all ready for production at the end of this week ;-)

Pre-production photos. Final product will probably be candy black.. and later several other color options.



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Wannabeaflyers Eppg Dream 7 months 4 weeks ago #75

If ever there was eye candy I'm looking at it now lol great progress and I know how it goes trying to get pricing .. my original concept used HTD gears and belts as they were off the shelf items . I will dig out the specs and post them if they can be of any help. When you get a ball park figure for prices post email quick so I will know if I need to give up the occlus rift I was buying for my motion platform :-)

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Wannabeaflyers Eppg Dream 5 months 3 weeks ago #235

Hi Guys I think I can at long last say that ball is rolling with my project , OK quick update

Motor rotor housing removed to fit E-one Small Drive pulley , step by step pics to follow
Paramotor Frame ( solo Gold ) motor mounting plate to be made as my E-One mounting holes are a different pitch ( Minor issue)

I will be able to mount the E-One unit to this new backing plate using hard rubber pads so win win on that score.

also took picture of the E-one assembly and will willingly post them here without hogging forum space

this post marks my intention to seriously contribute here and as a thank you to all the members feel free to critique my info and methods as that the way we learn ..

word of warning when removing the Bell Housing ( Bloody magnets are stronger than I thought Massive finger pinch proves you need to make sure the motor is firmly held when pulling the housing off cos if you slip make sure finger are clear
OUUUUCHHHH lesson learnt lol anyways will add that to my step by step guide if any one has to go down this Road ..

good news it was not as taking it apart was not as bad as it seemed and just remember thread locking compound during re-assembly .

also whilst I had it apart I made a new 12mm drive shaft to replace the stepped one fitted as standard ,so I will now have a shortened on suitable to fit the E-one drive pulley
just some random pic of bits n bobs collected to date :-)

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Wannabeaflyers Eppg Dream 5 months 3 weeks ago #237

It looks great Calvin. Super nice with a new project to follow, right from the start.

BTW: Great looking gear you have there :P
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Last Edit: by Gamba.

Wannabeaflyers Eppg Dream 5 months 3 weeks ago #241

another job done during my lunch break :-) shortened 12mm motor shaft fitted to motor bell housing and Smaall pulley screws secured with Loctite 270 ( hope I don't need to undo them ) see attached Pic's ..

If I get a chance then tomorrow i'll re-assemble the motor but something Ozflightclub mentioned that got me thinking about putting a temperature senor in the stator whilst is still have the motor open would seem like a good plan . so next mission is to buy a temperature sensor that can work for this ... any ideas about the range required , would be appreciated ..

My thoughts on this is that I Know I can use and ARDUINO Nano Or Uno + Lcd to easily give me a visual reading of the mtor temp and can even be configured to shut motor controller down in the event of exceeded the programmed temp .. i'll add my finding on this to the new Data collection and engine/ESC monitoring post that Ozfilighc;ub has created .. small update gusy but each one get me closer to the dream .. more boring pics though
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Wannabeaflyers Eppg Dream 5 months 3 weeks ago #249

Hey Wannabe.. I posted in the data section about temp sensors.. the KBY series seems standard. They are thermocouples so generate a voltage depending on heat. You just need one that can measure from zero to 150 C..

I still don't know how we burned out the Plettenberg motor used on the Paracell, as the motor should have stopped past a certain temp. And just on this.. sensors CAN fail - or their connection. we had a battery temp sensor fail and it kept us from flying till we figured that out. Part of the reason is that the sensor's connections were integrated into a 20 pin IDC connector (which also measures and controls cell voltages in flight (MGM controller) and we think the wires shorted on that connector. I now have a separate wiring of that sensor to the controller's data telemetry.

best, Peter
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Wannabeaflyers Eppg Dream 5 months 3 weeks ago #251

Aha a Name at last LOL , Cheers Peter , I bought a couple of sensors off E- Bay to do a quick test so will let you guys know how that works out and post the code and parts list , Circuit etc here ... Most of this is out there on the net so for me it will be a cut n paste and tweak the code deal , hopefully is will be part of a block of items that will be consolidated into one unit once the basic are in place ..Thanks Peter

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