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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion Docs  Gazelle Build
04-22-2021 07:57 AM  20 days ago
heliadictaholic

rrApprentice

Hobart, Tasmania - Australia

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G'day Joel, just found your RR post of quite a while ago.... I have not done any RC heli work, except for drones, for quite a while now.
My Gazelle and Blue Thunder have been sitting on a shelf waiting for me to get back to the hobby.
Disappointed that the fenestron mods have not worked out. I really don't think it is worth while my pursuing any more redesign work on this fenestron. Based on this and the fact that I am now retired, I think my gazelle and blue thunder might become display birds only, hanging from the roof in my "man cave". They certainly do look good with the scale Gazelle 3 blade rotor head I designed and my fenestron mods.... I think I might stick to heli's with common tail rotor design.
One thought I did have on the fenestron blades, would it have been better to have the blades designed with full symmetrical profile? Don't know..... What do you think?
Regards,
Jim
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04-22-2021 09:00 PM  20 days ago
Joel Rosenzweig

rrVeteran

Marlborough, MA - USA

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Hi Jim,

It's good to hear from you. I'm glad to hear you are still around!

I think that the profile you used is excellent. The weight of the blades is too high when made from metal. I thought metal was going to be a great idea when you asked me. But I was wrong. It just requires too much force to move those blades once they are at speed.

If you, or anyone were to continue the design, it would be ideal to use lighter weight material, nylon or whatever stiff plastic Hirobo used for their blades. There are 3D resin printers than can make parts from various high performance resins, and that would be great to experiment with. But, that is fairly pricey to play with. I am not at all suggesting using a filament printer. I don't think they are capable (as of now) of making a part with a suitable surface finish and uniform density. But the resin printers are a whole other technology with engineering resins that are potentially quite helpful.

Regards,
Joel
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04-23-2021 12:45 AM  20 days ago
heliadictaholic

rrApprentice

Hobart, Tasmania - Australia

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G'day Joel,
I will make some enquiries with the Chinese company who CNC machined the aluminium blades for me, to see if they can CNC, or 3D print some light weight plastic/resin blades.
I can't remember the name of the company at the moment, I will go back through my records....

Hope you and your family have managed to stay out of the way of covid over the last year+, stay well Joel.

Regards,

Jim
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