staraero1
Key Veteran
Location: Atlantic City, New Jersey
My Posts This: Topic Forum | Because the grip flip works in some cases, and does nothing for the woofs in many other instances. And it does work in some instances, but not for the reason most think. I can demo many Raptor helicopters that woof badly even with the grips flipped. And there are many people running grip flipped Raptors that still woof badly. Do you actually know this Colin? You seem to think that a grip flip will stop the woof flutter every time without exception on a Raptor. Not a chance. Many Raptors are still woofing badly with the flip done to them. This is because the grip preload to the dampers on their particular helicopter is simply still too loose.
Again, Thunder Tiger knew the blade grip flip would not work in every case. That is why they came up with the V2 head arrangement. And they should know the grip flip was not the cure all, they built the thing. That is the reason they changed the head design. They are in the design, marketing, and profit business. If a grip flip would have solved the trouble in every case, Thunder Tiger would have simply revised the building instructions to include flipped grips. It was never that simple, and they did not do this because it does not work reliably in each case. That is why the woof issue still gets talked about so much. There are also hundreds of people who did the grip flip, and their Raptor helicopters still woof like mad.
There new head design is built to have more damper head preload and tighter blade grip bearings. That is why the stock V2 does not blade flutter like the V1 does, in most cases. The new head design by Thunder Tiger simply put more damper preload against the back grip bearings. All you need to do sometime is get both heads together side by side, and you will clearly see what the V2 head is, that the V1 head is not. To see and clearly understand the Thunder Tiger solution to the woofs on their V2, just compare the two heads. Not rocket science to understand what the guys at T.T. did to fix the problem.
Again, Thunder Tigers solution for the woof blade flutter in the V2 heads was tighter carrier bearings in the V2 grips. And then a tighter rear blade grip bearing preload to the damper. Just that simple. That is what the V2 head has over the V1 head. Nothing more nothing less. And as you probably have noticed, Thunder Tiger did not flip the grip setup on the V2 either in their building plans. Simply because the grips running in trail is not the problem which actually causes the woof flutter. There was never a problem running the grips trailing, and Thunder Tiger understood this. If you have a good tight V2 head out of the box, or a V1 head with the bearing glue and washer mod, it lets you run the grips trailing. Like the helicopter was meant to be run, with no woof or flutter ever.
Anyway, this is not for Colin/Alexander and not for you guys who flipped the grips and that worked for you. This is for the people who have a Raptor helicopter, V1 or V2 30 or 50, that has the woof trouble. Even after trying a grip flip which did not solve the trouble. This mod will correct the damper preload trouble, and completely eliminate the Raptor blade flutter at high rotor RPM's. No matter which way you run the blade grips, the problem will be solved for sure. Just a suggestion if you got a Raptor with blades that are still fluttering at high rotor RPM's, no matter what you have tried to stop it. This will cure the trouble 100 percent of the time. It takes about 1 hour of your time, is simple and straight forward to do, and costs about 30 cents.
Staraero1 |
