Astro Flight 207d and FDM SS1 info

[arrowskartax9]

Hello, Does anyone have any technical info for the Astro flight 207d speed contoler?
And any info for the FDM SS1 cordite engine??
I have these items in my 31" mono and the engine doesnt seem to rev as hard as i would have hoped.
I am running twin 7.4 volt 25c 5000mah lipos.

[sjslhill]

thought

The 700 motor is for 14.4V, not 7.4

Info on the 207D, which is not for 7.4 either. You need a 212D or something else.


Voltage range 7 to 60 Volts
Turn on Voltage 7 Volts
BEC Cut off voltage 6 volts
Number of Nicad or NIMH Cells 6 to 40 Cells
Continuous Current Rating 60 Amps
PWM rate 3 KC
BEC Rating none
Opto Coupling Yes
Length 2 inches
Width 1 inch
Height 1/4 inch
Weight 40 grams
Servo Connector Universal
Power Cables 13 gage
Power Connectors Astro

[arrowskartax9]

Hello, thank you for replying. With the 2 lipos linked that brings the voltage up to 14.8 volts.
Is that the correct way to work it out? And is that ok for this motor and speed controler?
It came as a 100% rtr from fine design and this is their setup.

[Steven Vaccaro]

The voltage is good. Depending on the prop used, you should be in the 25-30mph area. The only thing to worry about is that the astro doesnt have a low voltage cut off for the lipo packs.

[sjslhill]

woops

I missed the twin part....Steven is correct.

Hello, thank you for replying. With the 2 lipos linked that brings the voltage up to 14.8 volts.
Is that the correct way to work it out? And is that ok for this motor and speed controler?
It came as a 100% rtr from fine design and this is their setup.

[SJFE]

Hello Mr Hill Nice to see you .

[sjslhill]

Hey

How ya been doing?

Hello Mr Hill Nice to see you .

[arrowskartax9]

Thanks for the info. I am going to use X440 prop.
Do i need 2 seperate low voltage cut offs or just 1 ?
Chris.

[SJFE]

Been ok man I hope the battery Biz is still goin ok for ya.

[steveo]

Thanks for the info. I am going to use X440 prop.
Do i need 2 seperate low voltage cut offs or just 1 ?
Chris.

a x440 is a little small for a 31" mono, i had the same motor in a 32" mono running a 445/645/448 with no problems try a few cheap cf props

[arrowskartax9]

What is better for this setup for my boat, In series or paralell for the lipos? At the moment they are in paralell.

[steveo]

if you have 2 7.4 lipos wire them in series to get 14.8 volts

series= voltage is additive and amperage remains the same

parallel=amperage is additive and voltage stays the same

[steveo]

if your are in parallel now you have just extended you runtime and current draw, and i am sure its not fast at the moment

wire in series and watch out its like night and day for speed, but your runtime will not be as long

[arrowskartax9]

Thanks for the info guys. I have been to my lhs in Melbourne and had a lead made up to run the lipos in series. What prop should i use? Chris at Fine Design sent me x440 3 blade balanced and sharpened for this boat and setup.

[steveo]

x445/x645/x447

do you have a pic of the boat we can see, mostly the transom for the setup of hardware