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Old 03-13-2009, 08:22 AM   #1
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Default D8E Homebrew - Work in progress

Well started an seperate thread as now there is something to see

It's still work in progress and the pictures in the first post are temporary setup as my orderd parts are not here yet. Most of the work is done by my friend Mani (Cheers dude) and tomorrow we gonna test it out and sunday we gonna bash some nitro's on the Winterchamps (Or my car might caught fire )

The final setup should be:
Regulator: Mamba Monster Max V3
Motor: Medusa Afterburner 36-60-1600
Bec: UBEC castle creations
Motor Mount: Fioroni
Battry's: A123 6C (19,8 volt)
Pinion: 16T or 17T

Saturday we gonna test wich kv rating engine would fit the D8 for its best we will try 1300kv, 1600kv and an bullet 2000kv

Some calculations on the gear ratio's with different engines:
1300 kv with 15 t pinion: 66,6 km/u
1300 kv with 16 t pinion: 71,1 km/u
1300 kv with 17 t pinion: 75,5 km/u
1300 kv with 18 t pinion: 79,95 km/u

2000 kv with 15 t pinion: 102,5 km/u
2000 kv with 16 t pinion: 109,3 km/u
2000 kv with 17 t pinion: 116,2 km/u
2000 kv with 18 t pinion: 123 km/u

Take care these are calculations and it seems they generally in real life the speeds are an bit higher. Offcourse we want an car thats able to drive and not like an Gekko on the track.


As all my goodies are not here yet we have made an temp setup:
Motor: 1300Kv (Will be later Medusa Afterburner 1600Kv
Centerdiff: 46 Tands (Orginal D8 = 48 Tooth but now replaced with Kyosho MP777 spur)
Centerdiff mount: Kyosho (The D8 centerdiffmount is replaced as now we have better motor clearance on the steering posts)
Braks: Motor braked. Setup is build that additional servo could be added
Battery: 6S Lipo (Will be later 6S A123 19,8V)
Regulator: MGM Compro (Will be later Mamba Monster Max V3
Tray: Fioroni (Will be later custom molded A123 tray)

Well pictures tells more than words:








An example of the A123 tray on an different car:


Special thanks to Mani and friends for their quick help getting this car ready for the weekend!

To be continued ....

Cheers,
Jerome
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Old 03-13-2009, 08:34 AM   #2
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Quote:
Originally Posted by [email protected] View Post
Well started an seperate thread as now there is something to see

It's still work in progress and the pictures in the first post are temporary setup as my orderd parts are not here yet. Most of the work is done by my friend Mani (Cheers dude) and tomorrow we gonna test it out and sunday we gonna bash some nitro's on the Winterchamps (Or my car might caught fire )

The final setup should be:
Regulator: Mamba Monster Max V3
Motor: Medusa Afterburner 36-60-1600
Bec: UBEC castle creations
Motor Mount: Fioroni
Battry's: A123 6C (19,8 volt)
Pinion: 16T or 17T

Saturday we gonna test wich kv rating engine would fit the D8 for its best we will try 1300kv, 1600kv and an bullet 2000kv

Some calculations on the gear ratio's with different engines:
1300 kv with 15 t pinion: 66,6 km/u
1300 kv with 16 t pinion: 71,1 km/u
1300 kv with 17 t pinion: 75,5 km/u
1300 kv with 18 t pinion: 79,95 km/u

2000 kv with 15 t pinion: 102,5 km/u
2000 kv with 16 t pinion: 109,3 km/u
2000 kv with 17 t pinion: 116,2 km/u
2000 kv with 18 t pinion: 123 km/u

Take care these are calculations and it seems they generally in real life the speeds are an bit higher. Offcourse we want an car thats able to drive and not like an Gekko on the track.


As all my goodies are not here yet we have made an temp setup:
Motor: 1300Kv (Will be later Medusa Afterburner 1600Kv
Centerdiff: 46 Tands (Orginal D8 = 48 Tooth but now replaced with Kyosho MP777 spur)
Centerdiff mount: Kyosho (The D8 centerdiffmount is replaced as now we have better motor clearance on the steering posts)
Braks: Motor braked. Setup is build that additional servo could be added
Battery: 6S Lipo (Will be later 6S A123 19,8V)
Regulator: MGM Compro (Will be later Mamba Monster Max V3
Tray: Fioroni (Will be later custom molded A123 tray)

Well pictures tells more than words:








An example of the A123 tray on an different car:


Special thanks to Mani and friends for their quick help getting this car ready for the weekend!

To be continued ....

Cheers,
Jerome

How do you wire up the two lipos through a single ESC? New to Electric but really getting the bug!
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Old 03-13-2009, 09:04 AM   #3
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You connect them in Series, so you double the amount of cells.
You connect them in Parallel, so you can double the capacity.
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Old 03-13-2009, 09:31 AM   #4
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Quote:
Originally Posted by rcjunky10 View Post
How do you wire up the two lipos through a single ESC? New to Electric but really getting the bug!
Enjoy!

http://www.scriptasylum.com/rc_speed/_wiring.html
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Old 03-13-2009, 10:34 AM   #5
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why use a bec with a MMM?

there is no need
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Old 03-13-2009, 12:24 PM   #6
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Originally Posted by bradfox2 View Post
why use a bec with a MMM?

there is no need
Well there is an need: SAFETY for the receiver & servo's
As the final system will run on 19,8 Volt and if the MMM blows it might happen that the 19,8V is going to my quite expansive receiver and the servo(s). So Safety first and additional bec for just 20$ to save 375$ when the MMM blows and routes it's 19,8V to my aditional parts.
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Old 03-13-2009, 02:33 PM   #7
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Minor update:
- The A123 6S pack is ready so i can start cycling them tomorrow to get them alive.
- The A123 Battery tray is ready pics will follow after this race weekend

We will do some test runs with the 1300KV, 1600KV & 2000KV compared to Nitro engine and will make 10 laps or so with each with GPS onboard to get some data.
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Old 03-13-2009, 05:43 PM   #8
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Quote:
Originally Posted by [email protected] View Post
Minor update:
- The A123 6S pack is ready so i can start cycling them tomorrow to get them alive.
- The A123 Battery tray is ready pics will follow after this race weekend

We will do some test runs with the 1300KV, 1600KV & 2000KV compared to Nitro engine and will make 10 laps or so with each with GPS onboard to get some data.
I have a d8e too but i used a tekno kit.this might help you out.
Speed & Gearing Calculator on this page.
http://www.rctech.net/forum/electric...ml#post5187610
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Old 03-13-2009, 07:42 PM   #9
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Dude, looks sweet! I just got my D8 today and will probably go brushless next summer!
I would be doing it now but have $300 spent already this year on engines, so perhaps next year when I get these engines wore out....

Loogs like s slick setup though!!!!
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Old 03-16-2009, 02:19 AM   #10
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Yech ... back to the drawingboard Some things went wrong with drilling the chassis for the Fioroni mount. Well hope to get it ready for next weekend. The MMMv3 will be there then also.
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Old 04-04-2009, 04:13 AM   #11
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Huge update ...

The car is ready and awesome fast

Driving time with the 2000kv engine with 16T/46T is arround 8.30 minutes on the A123 6S 2300mah pack.
With the 1600kv with 18T/46T i get 1 1/2 minute more driving time but the speed is an bit lower.

The general speed on the track is same as nitro might be an slight bit faster but on acceleration the D8E wins . The car is better to drive as the center of gravity is verry low on this car and you are able to push it much harder through te corners.

Details:
Car: Hotbodies D8
Motor(s): Medusa Afterburner 1600kv & 2000kv 60mm
Regulator: Mamba Monster Max v3
Battery's: 19,8v 2300mah A123 Pack
Pinion(s): 14T, 15T, 16T 7 17T
Spur: 46T
Mount: Fioroni + cooling insert to get from the 36mm engine size to the mount size.
Weight including tires: 3850 gram (5 gram less then Nitro version with filled tank)

Pics:







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Old 04-04-2009, 04:50 AM   #12
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Originally Posted by [email protected] View Post
Huge update ...

The car is ready and awesome fast

Driving time with the 2000kv engine with 16T/46T is arround 8.30 minutes on the A123 6S 2300mah pack.
With the 1600kv with 18T/46T i get 1 1/2 minute more driving time but the speed is an bit lower.

The general speed on the track is same as nitro might be an slight bit faster but on acceleration the D8E wins . The car is better to drive as the center of gravity is verry low on this car and you are able to push it much harder through te corners.

Details:
Car: Hotbodies D8
Motor(s): Medusa Afterburner 1600kv & 2000kv 60mm
Regulator: Mamba Monster Max v3
Battery's: 19,8v 2300mah A123 Pack
Pinion(s): 14T, 15T, 16T 7 17T
Spur: 46T
Mount: Fioroni + cooling insert to get from the 36mm engine size to the mount size.
Weight including tires: 3850 gram (5 gram less then Nitro version with filled tank)

Pics:







hi bro, any difference for the last photo you had, you change it to a turn buckle type?
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Old 04-04-2009, 09:51 AM   #13
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hi bro, any difference for the last photo you had, you change it to a turn buckle type?
Yupp there was no place for the stock brace and tried various soulutions but none of them fitted. Thats why i used the steering lower turnbuckle.
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