Amp Draw ?

[Jeff Vaughan]

Any one out there know what the amp draw is for the following:

Vans Flap motor
Vans FACIT Fuel boost pump
Vans Primer

Working on my wiring and I can not locate this info.

Thanks

Jeff Vaughan
7A

[gmcjetpilot]

I think there are a couple of threads on this but my guess is
Fuel pump 1.7A
Flaps 1.5 A (up to 3 amps under high load)

If you have the primer solenoid you could hook it up with a multimeter that has an ammeter. Just remember to switch it to high amps, because my multimeter blows a fuse when I forget.
G

[vlittle]

Some of the info is here (3rd link down)

electrical load

I have not confirmed everything on flight testing, but at runup, with lights on, fuel pump on, avionics on (basically full load except flaps), I see about 16-18 amps, which matches the spreadsheet.

No load, I see 3-5 amps, which is battery charging current, field current and avionics on receive/standby. If the battery is low, this current increases.

No info on the primer pump, since it's not (normally) used in flight.

Vern Little
9A

[tx_jayhawk]

Jeff,

I just was measuring this on my flap motor the other day. Without the flaps connected (just moving the weldment), it seemed to max at around 1.75 amps. I suspect it may be higher with a higher load (flaps connected).

Scott

[mburch]

Originally Posted by tx_jayhawk

I just was measuring this on my flap motor the other day. Without the flaps connected (just moving the weldment), it seemed to max at around 1.75 amps. I suspect it may be higher with a higher load (flaps connected).

Many people use a 5A fuse for their flaps, then change to a 7.5A fuse after the first few times they blow the fuse in flight - myself included. The current draw is a lot highter with air loads on the flaps.

mcb

[RV_7A]

Well whatever the actual current draw is it can easily be checked without flying the plane. When the flap motor reachs the end of its travel and the clutch starts slipping is pretty much the highest load this motor will ever see...

-Jeff

[mark manda]

mickey asked what size potter/brumfield circuit breaker pops on my 7A when I deploy full flaps above 100kts. 5 amp resetabl CB.

I landed about ten times today and didn't pop it so I don't think it will ever happen again.

[sprucemoose]

Originally Posted by mark manda

when I deploy full flaps above 100kts.

??? Isn't that a bit over Vfo?

[Mel]

I believe Van's flap limits are: 1/2 flap...110 mph. Full flap...100 mph.
These are for the aerobatic RVs. Not sure about the -9 & -10.
Mel...DAR

[alpinelakespilot2000]

Originally Posted by Jeff Vaughan

Any one out there know what the amp draw is for the following:

Vans Flap motor
Vans FACIT Fuel boost pump
Vans Primer

Working on my wiring and I can not locate this info.

Thanks

Jeff Vaughan
7A

Facet 40108 fuel pump = 0.8 amp max
Source: http://www.wicksaircraft.com/catalog...410/index.html

Parker primer B2DX62 = 0.5 amp ("normally closed", whatever that means)
Source:http://www.wicksaircraft.com/...162/index.html

Note: these are just the numbers provided in Wick's catalog.