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SavardStephane · 03-08-2008, 02:41 PM

I'm currently building a new kit which will have pnematic retracts (Robarts). These will be my first retracts, but there is one thing I could not find... to what PSI should the air tank (Robart small tank) be filled?

The reason I ask is that I just came back from canadian tire where I bought an AirMan cordless air compressor (60% off). I specifically bought the one that has a rechargable battery because I don't have a field battery or power panel (I'm still using a chicken stick since I started 5 years ago

) Anyway, the instructions in it says not to exceed 120 psi, so will this be a problem, or should I return it for the 12V compressor (also 60% off this week) that claims to go to 150 psi and invest in the field battery for my field box?

I don't currently have the retract system available to test it out, its been ordered from great hobbies, but the mailman hasn't delivered it yet.

voyager_663rd · 03-08-2008, 02:42 PM

80-100 psi (the small tank is good to 150)

pep · 03-08-2008, 03:11 PM

Hey Stephane,great find.I think i'll pick one up too.
It beats using that little hand pump.
Phil

SavardStephane · 03-08-2008, 06:10 PM

okay then, thanks for the replies, I'll be keeping it. Looking through the user manual for this compressor, it states that the rechargeable battery is good for 12-17 minutes of operation (looks a lot like a cordless drill battery pack).

it also comes with a second "battery pack" that has a cord with 12V adapter for a car 12V outlet.

michel gravelle · 03-08-2008, 06:10 PM

Hi

The hand pump that Robart sells is good excercise , which I try very hard to stay away from

Michel

chevelledude13 · 03-09-2008, 01:36 PM

How are you going to adapt the output of the pump to the fill valve on your plane (i.e. the schrader valve)? I am just setting up some Robart gear also and it seems that you can't use the regular fill chuck valve (like you find at the end of the air hose at a gas station). You have to use the gold coloured fitting supplied by Robart which screws into the fitting on your airlplane. This kinda forces you to use a Robart hand pump, does it not? My first set of retracts were Sierra Giants, and the fill valve was just like the schrader valve on any car or bicycle tire. I take a small air pig to the field and use it to pressurize the gear...works great, but won't work with Robart fill valve.

Blah, blah, blah...sorry for being so wordy.

SavardStephane · 03-09-2008, 02:18 PM

Well, I haven't seen the robart fill adapter yet, so I can't answer you on that. But, I heard on other threads that there was a very simple modification that can be done that involves the basketball fill adapter (i.e. the needle adapter) and some tubing.

Once I get the gear I'll try the modification and post a picture.

michel gravelle · 03-09-2008, 03:18 PM

Hi
I used the standard ROBART VALVE . I attached a needle valve that inflates basketballs and what not , than I simply added a piece of air tubing with the ROBART valve , it works great . I think thats its better than the quick
disconnect .

Michel

voyager_663rd · 03-09-2008, 04:34 PM

EXACTLY as Michel describes.

SavardStephane · 03-09-2008, 06:13 PM

ah! that's it, thanks Michel!

I won't have to go hunting for this informnation (I had never seen a picture of it, only some text descriptions)

03-08-2008, 02:41 PM	#1
SavardStephane RCC Junior Contributor Join Date: Jan 2004 Location: Montreal Feedback: 0 / 0% Posts: 121 Total Props: 0	Retract pump I'm currently building a new kit which will have pnematic retracts (Robarts). These will be my first retracts, but there is one thing I could not find... to what PSI should the air tank (Robart small tank) be filled? The reason I ask is that I just came back from canadian tire where I bought an AirMan cordless air compressor (60% off). I specifically bought the one that has a rechargable battery because I don't have a field battery or power panel (I'm still using a chicken stick since I started 5 years ago ) Anyway, the instructions in it says not to exceed 120 psi, so will this be a problem, or should I return it for the 12V compressor (also 60% off this week) that claims to go to 150 psi and invest in the field battery for my field box? I don't currently have the retract system available to test it out, its been ordered from great hobbies, but the mailman hasn't delivered it yet.
	.

03-08-2008, 06:10 PM	#5
michel gravelle RCC Supreme Contributor I am: Michel G Join Date: Apr 2006 Location: Saint-Jerome Quebec Canada Feedback: 3 / 100% Posts: 3,316 Total Props: 12	Hi The hand pump that Robart sells is good excercise , which I try very hard to stay away from Michel __________________ M.A.A.C. 75640 Hitec Aurora 9 LT-40 LT-60 Alpha-40 Tiger-60 (90 ) ARF P-51 40 TF-P51 Giant KIT TopFite P-51 Giant ARF X 3 Hanger 9 SpitFire 60 ARF X2 TopFlite Elder-40 ( on the board ) Aero Works 540 T -60 The Ground came up and hit my plane
	.

03-09-2008, 03:18 PM	#8
michel gravelle RCC Supreme Contributor I am: Michel G Join Date: Apr 2006 Location: Saint-Jerome Quebec Canada Feedback: 3 / 100% Posts: 3,316 Total Props: 12	Hi I used the standard ROBART VALVE . I attached a needle valve that inflates basketballs and what not , than I simply added a piece of air tubing with the ROBART valve , it works great . I think thats its better than the quick disconnect . Michel Attached Thumbnails __________________ M.A.A.C. 75640 Hitec Aurora 9 LT-40 LT-60 Alpha-40 Tiger-60 (90 ) ARF P-51 40 TF-P51 Giant KIT TopFite P-51 Giant ARF X 3 Hanger 9 SpitFire 60 ARF X2 TopFlite Elder-40 ( on the board ) Aero Works 540 T -60 The Ground came up and hit my plane
	.

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03-08-2008, 02:42 PM	#2
voyager_663rd RCC Supreme Contributor I am: Len, an RPAS pilot Join Date: Sep 2003 Location: Toronto, Ont Feedback: 1 / 100% Posts: 4,650 Total Props: 20	80-100 psi (the small tank is good to 150)
	.

03-08-2008, 03:11 PM	#3
pep RCC Pro Contributor I am: Phil E. P Join Date: Apr 2005 Location: Newmarket on. Radio of choice: Futaba Feedback: 56 / 100% Posts: 1,707 Total Props: 7	Hey Stephane,great find.I think i'll pick one up too. It beats using that little hand pump. Phil
	.

03-09-2008, 01:36 PM	#6
chevelledude13 RCC Senior Contributor I am: Andris F Join Date: Sep 2005 Location: Kincardine, Ontario Radio of choice: JR 9303 # of RCs: 8 Feedback: 16 / 100% Posts: 648 Total Props: 5	How are you going to adapt the output of the pump to the fill valve on your plane (i.e. the schrader valve)? I am just setting up some Robart gear also and it seems that you can't use the regular fill chuck valve (like you find at the end of the air hose at a gas station). You have to use the gold coloured fitting supplied by Robart which screws into the fitting on your airlplane. This kinda forces you to use a Robart hand pump, does it not? My first set of retracts were Sierra Giants, and the fill valve was just like the schrader valve on any car or bicycle tire. I take a small air pig to the field and use it to pressurize the gear...works great, but won't work with Robart fill valve. Blah, blah, blah...sorry for being so wordy.
	.

03-09-2008, 02:18 PM	#7
SavardStephane RCC Junior Contributor Join Date: Jan 2004 Location: Montreal Feedback: 0 / 0% Posts: 121 Total Props: 0	Well, I haven't seen the robart fill adapter yet, so I can't answer you on that. But, I heard on other threads that there was a very simple modification that can be done that involves the basketball fill adapter (i.e. the needle adapter) and some tubing. Once I get the gear I'll try the modification and post a picture.
	.

03-09-2008, 04:34 PM	#9
voyager_663rd RCC Supreme Contributor I am: Len, an RPAS pilot Join Date: Sep 2003 Location: Toronto, Ont Feedback: 1 / 100% Posts: 4,650 Total Props: 20	EXACTLY as Michel describes.
	.

03-09-2008, 06:13 PM	#10
SavardStephane RCC Junior Contributor Join Date: Jan 2004 Location: Montreal Feedback: 0 / 0% Posts: 121 Total Props: 0	ah! that's it, thanks Michel! I won't have to go hunting for this informnation (I had never seen a picture of it, only some text descriptions)
	.

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