Paul Tradelius’s Blog

Raptor 90 G4 Setup Innovation

Jan 18, 2012 No Comments

Initial helicopter setup, for aerobatics and 3D flying, centers around having the servo arms and bellcranks square while the swashplate is level and the blades at zero pitch. Several after market tools have been around for some time to make this process both a little easier and more accurate. However, until now, we have never [...]

Read more

Raptor 90 G4 All metal adjustable control arms

Jan 18, 2012 No Comments

I’ve never seen a helicopter kit come with its own servo control arms, but the Raptor 90 G4 does just that. Normally we install the servos of our choice and attach either stock control arms, or some after-market reinforced arms. Unfortunately both types of arms use splines to attach to the servo output shaft, which [...]

Read more

Raptor 90 G4 Main Gear

Jan 18, 2012 No Comments

It’s not very often I have a lot to say about the main gear of a helicopter, but this one is special and of a unique design that we have not seen in the past. The Raptor 90 uses a helical main gear that has several features. First of all it’s made of Delrin, which [...]

Read more

Raptor 90 G4 Head

Jan 17, 2012 No Comments

This Raptor 90 G4 has a lot of unique design features, with one being the all metal flybarless rotor head which is a nice combination of both beauty and a great design. You can just see the quality of construction in the photo, but what is not quite so obvious is its unique design. All [...]

Read more

Valley View Cellmeter 7 Battery Checker

Jan 17, 2012 No Comments

There are no shortages of battery checkers on the market, but this Cellmeter 7 from Valley View (www.valleyviewrc.com) has a lot of great features I have not seen in one checker before. It’s easy and safe to use and can check LiPo/LiFe/Li-Ion batteries with 2-7cells, Nicd/NiMH batteries with 4-7cells and read out total voltage, total battery cell capacity [...]

Read more

Raptor 90 G4 Review Cont.

Jan 16, 2012 No Comments

The Raptor 90 G4 has several new and interesting design features, one of which is the all metal fan. As you can see in the photo, this is a completely different design fan than we have ever seen before. It’s hard to describe in words, other than to say it’s hollow and does not have [...]

Read more

OS 91HZ-R 3D Engine with Powerboost Pipe

Jan 13, 2012 No Comments

My review of the Raptor 90 G4 is going to need a powerful and reliable engine to perform at its best, and what could be better than the OS 91HZ-R 3D with Powerboost Pipe. This basic engine is actually available in several different forms. First as mentioned here with a black head designed for 3D [...]

Read more

Raptor 90 G4 Review

Jan 13, 2012 No Comments

Several years ago I reviewed the Raptor 90 3D for this magazine, and now the Raptor legend continues with the new and ever improved Raptor 90 G4.  Experience is a great teacher, and a great example of this is the Raptor line of helicopters, which uses their previous designs to continually improve their line of [...]

Read more
pault

About the author

A regular contributor to Model Airplane News, he is also the columnist for our “Rotor Speed” helicopter column. Paul has been flying RC helicopters since the early ‘80s and now enjoys all types of rotary machines, including scale and aerobatics, and he continues to experiment with modifications to improve performance.
Copyright © 2014 Air Age Media. All rights reserved.