Part numbers for Ergo boom and belt for Stretched E-Raptor

[WillJames]

Somewhere there are part numbers so you can run 690mm blades on one of DJ's Stretched E-Raptor Camera Ships. Does anyone know right off hand the boom and belt part numbers.

Sorry I know this has been covered somewhere before.

Thank you in advance for helping!

[askman]

JR ergo boom is what I've heard.

[dreslism]

Will,

You mention 690's, I have only seem DJ mention 680's, maybe he mentioned 690's, but here is the link to the stuff.

http://www.helifreak.com/viewtopic.php?t=13715

[WillJames]

The Boom is the right number. There is a thread somewhere where it tells the part number for the belt where you can not cut the boom and run 690's. I want to get these TT blades with the ground down roots off this machine, and get some V's on it.

[WillJames]

Found it using search!!

http://www.helifreak.com/viewtopic.php?p=156747#156747

[lakespinner2]

I've been running a set of SAB 690 semi symmetrical blades with that belt and it's fine, although those blades aren't much longer than the thunder tiger 680's. there's less than 10 mm difference.

[WillJames]

Which belt the 385 or the one I already have withthe cut down Ergo Boom?

I have been tempted to try the 690's on it with the cut down boom, but it looks pretty close. I have not compared the V's length with the TT 680 length however...

Thanks for the info guys!!

[lakespinner2]

I checked the other thread and just saw the part number for the 368 belt first, which is probably the one you already have installed; that's the one I'm running. I used a cut down vigor boom.

I measured the tail blades and it has the 92 mm carbon gohbee tail blades on it. It seems to clear the SAB 690 semi mains ok although I wouldn't want to go much longer. I also installed the gohbee 8 tooth tail pulley (vs the stock 9 tooth) on the tail to speed up the tail a bit, so even smaller tail blades would probably be ok.

The SAB 690 semi's are coming off, I like the 660 funkey semi's a lot better; the 660's auto much slower than the 690's. I haven't tested them when carrying a heavy load so all I've got to go by is the way they auto. The 660's with no load are the slowest autoing combo I've tried so far. I still can't touch those amazing Clintstone autos, I haven't been able to thermal yet. :mrgreen:

[Teej]

Just a little note to update...

Turns out that the Ergo boom appears to need just the slightest bit of shortening (haven't done it yet, but it might be as little as a millimeter or two) with TT frames.

I had originally built my camera ship up on Gohbee frames but I changed my mind about using them...think I got a bad set of spacers or something - many of the frame screws I couldn't get tight without using 2 screwdrivers on each end - the spacer would rotate in their sockets. Since I was ordering frames for my play heli I got another set along with the aluminum spacers to assemble it. Turns out there's a tiny difference in the "depth" of the tail boom channel on the rappy vs gohbee frames.

With the raptor frames, the ergo / 385 combo is just a hair too tight. With the gohb frames, you could mount the boom like a stock heli - shove the boom all the way in, slip the belt over the tail drive gear and pull the boom back to tighten. With the TT frames the belt is too tight to fit on by hand. Takes minimal effort to coax it on with a screwdriver or something but then it's still very tight and puts too much side load on the system. So as I said it needs just a tiny bit of shortening. Grinding down the end (or perhaps the locator slots, I'm not sure which is the restriction yet) with a dremel will make it a perfect fit.

And yes, I'm quite positive my belt isn't twisted.