Robart - 630RS 90 degree Pneumatic Main Retracts - HELP Question:
 

Hi Guys,

I have the 630RS 90 degree Pneumatic Main Retracts .

I have the ESM Model Bald Eagle (approx.- 15 -18 pounds) 72" span. Is there a rule of thumb for the size of the air tank that can or should be used? Robart makes 3 different size air tanks. Extra small, Small and Large. Does anyone know of the size tank to be used with a plane of the approx. listed size and retracts above and how many cycles that the tank will deliver. A cycle would be dropping the gear and then raising the gear = One Full Cycle.

Thanks Ed

My suggestion is to go with other largest tank you can fit in the airframe or gang several (2 to 4 ) small ones together . A single small tank will rarely get you enough air to operate more than one cycle on the medium and large retracts

Hi CK1

I have a Large Tank now but its to Big & Cumbersome too get into the plane. I have the Extra Small tank, but its too small of air capacity for these size retracts. I was thinking of just getting the Small tank which is the middle size of the 3 tanks they make. I never heard of using multiple tanks. Would you set them up in Series or in Parallel and I guess using T fittings.

Thanks
Ed

Yes , you would use t's to connect all the tanks together in series since there is only one direction of flow from the tanks once pressurized . Locate the tanks wherever convenient and run a line between them .

Two medium tanks is what the midwest AT-6 used in it's design,, it worked very well and easier to fit than the large tank would have been,,,

Not Trying to Beat A Dead Horse:
 

Question:

Could you use , lets say two different size tanks without any issues? Ex. A small tank and an Extra Small tank and get the same pressure to the retracts needed?

Thanks
Ed

There is no problem with using different size tanks to get the air volume you need .

Finally A Good Fit:
 

Cooollll….. Thanks CK1... Thwill make the install a Whole Lot Easier.... I was using the Robart Large Air Yank and it was becoming a real ***** trying to get it into the Fuse ANYWHERE!!!!!!!!!

Thanks Again...
Eddie