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Modified Hotspot

Old 08-13-2004, 07:46 PM
  #26  
grbaker
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Default RE: Modified Hotspot

Apparantly, the MM Roo/Rookie gear are not the same as the Eurosport gear.

Here is the pic from Composite-ARF site
Old 08-13-2004, 08:34 PM
  #27  
erbroens
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Default RE: Modified Hotspot

Gary, certainly this gear is not like mine. My wheels are BVM, robart air valve,etc.

Rgds, Enrique
Old 08-13-2004, 08:41 PM
  #28  
Woketman
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Default RE: Modified Hotspot

Gary, in that photo in post #24, is that marks on the gear flange I see? From a vise during straightening ops???
Old 08-13-2004, 08:43 PM
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Default RE: Modified Hotspot

Enrique
I agree. I think you have Robarts. Interesting idea about putting rubber under the mounts. It's the initial shock that causes the damage to the gear. Hope this setup works out for you.
Old 08-13-2004, 09:07 PM
  #30  
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Default RE: Modified Hotspot

Right now we have 2 flights with this rubber mounts and for the first time in this plane's life we didn't need to straighten nothing! seems to me that it works, 'cause the landings where as good
as the ones that we had trouble with the legs.


Rgds, Enrique
Old 08-14-2004, 02:00 PM
  #31  
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Default RE: Modified Hotspot

Well, here is some pictures of Robart gear sitting next to MM gear. There are several ways to tell. I made my presumption based on the missing holes near the end of the cylinder (at least I couldn't see them in his pictures). Upon inspection of what I've got here, it's possible that you just simply can't see the holes in his picture as it's not detailed enough. One thing that does support that he has Robart gear is the hole near the sidewall that you can see. That does seem to match up with my attached pictures of Robart.
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Old 08-14-2004, 08:23 PM
  #32  
erbroens
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Default RE: Modified Hotspot

Hi Sean, to be truly honest, I didn't think that the main issue here is if my gear is Robart or M&M's, but , setting this aside, our real problem about the landing gear are legs that bend like they where built of butter. As you saw already, I put the rubber strips that worked so far, but I think that this is not the best solution. I think that the knee-action type of landing gear would be the best technical solution. We are trying to find here a machinist pacient enough to do for us something like this,

Rgds, Enrique
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Old 08-14-2004, 08:46 PM
  #33  
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Default RE: Modified Hotspot

I designed, built and tested (on an Isobar) some gear that do what you want. See the photo below. It has knee action and you can vary the stiffness by adding or deleting O-rings.
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Old 08-14-2004, 08:50 PM
  #34  
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Default RE: Modified Hotspot

Nice! how did it worked??? are you currently using it?
Old 08-14-2004, 10:44 PM
  #35  
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Default RE: Modified Hotspot

It worked very well. I built it to use on my Boomerang that I still have yet to complete. I tested it on the Isobar for a few flights with the gear down. The Isobar was not designed to work with this gear so the retract openings are wrong for it and I could not retract the gear. I just need more time.
Old 08-15-2004, 01:12 AM
  #36  
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Default RE: Modified Hotspot

Try a company, I think the name is Eurokit? Something like that. They have commercial struts that look like Mark's.
Old 08-15-2004, 04:01 AM
  #37  
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Default RE: Modified Hotspot

The Eurokit ones work very well on grass.
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Old 08-15-2004, 08:24 AM
  #38  
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Default RE: Modified Hotspot

Thanks Woketman/Sean/SJN, this gear seems to be exactly what I looked for! I'll be ordering a set of this ones right this week. I suppose that the BVM wheels could be fitted in this units without too much work. I also liked very much Woketman's idea of setting the stiffness of
the legs with o-rings.

Rgds, Enrique
Old 08-15-2004, 08:38 AM
  #39  
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Default RE: Modified Hotspot

My idea about the variable stiffness is to be used by me this way: Depending on the weight of th plane I will add O-rings until I can not see the strut flexing under normal taxiing. The idea being that normally, the strut stays closed and only absorbs shock during higher loads like a rough landing.
Old 08-15-2004, 08:49 AM
  #40  
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Default RE: Modified Hotspot

Yes, that's why I liked it, you can easily fine tune the stiffness depending on the plane's weight
without chaging coils, etc.
Old 12-17-2009, 09:35 PM
  #41  
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Default RE: Modified Hotspot

Well, after some years another one is getting ready... It was left unfinished for a good year or two, because some parts where missing, like the canopy.. found somewhere a interesting article on making fiberglass parts with foam and brown tape, and it worked well. Also the local graphics guy had a new machine with improved resolution and all this led to finishing this one and probably selected as the weapon of choice for 2010:


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Old 12-17-2009, 09:39 PM
  #42  
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Default RE: Modified Hotspot

Hard to believe that I started this thread in 2004.. life is going by too fast.
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Old 12-17-2009, 10:02 PM
  #43  
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Default RE: Modified Hotspot

WOW!!! Looks gorgeous. Please post flight photos/vids when she flies!
Old 12-17-2009, 10:07 PM
  #44  
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Default RE: Modified Hotspot

Thanks Mark!

Talking about videos I was thinking in doing the maiden and later tests flights with a small camera looking at the control surfaces, as a check for flutter or something else wrong.. kind the ones you guys put in that big orange tank.
Old 12-17-2009, 10:18 PM
  #45  
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Default RE: Modified Hotspot

A problem that I just found in the project. in this version I select a naca 0008 airfoil for the elevator, instead of the 0009 I used on the first one, and the servo now didn´t fit.. it is likely that I will need to make a aluminum cover with some kind of bump. oh well...

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Old 12-17-2009, 10:23 PM
  #46  
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Default RE: Modified Hotspot

powerbox anyone? no thanks, I prefer my auto-organizating systems...
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Old 12-19-2009, 08:57 AM
  #47  
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Default RE: Modified Hotspot

excellent plane enri,y suppose it¨s the one you told me on mails,y hope i`ll get my storm ready in 1 or 2 month,
greetings
norberto
Old 12-19-2009, 10:02 AM
  #48  
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Default RE: Modified Hotspot

look very nice my friend![8D]
yes time past fast..what engine you put on?
Old 12-19-2009, 11:04 AM
  #49  
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Default RE: Modified Hotspot

Man I remember my Hotspot, I think Anton from Skymaster/X-treme Jets should kit one! With his talent it will be a winner, they are a blast!
Old 12-19-2009, 09:23 PM
  #50  
Roger Shook
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Default RE: Modified Hotspot

I had a custom set of trailing link struts made for my Hotspot. I believe the springs are too soft on the main struts as they deflect back on the takeoff run/fast taxi and the worst part of that seems to be that it changes the cg relative to the axles causing the it to be hard to rotate for takeoff. I can't get any help from the guy who made them for me as he has disappeared, left rc. I will need to get the length of these springs measured and see if anyone has any suggestions for getting stiffer ones.???
I will take some decent pictures of my struts, for you all to see .
Roger
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