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« Reply #100 on: May 12, 2019, 08:17:38 PM »
K K Iyer
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@glidiator,
Great stuff, sir. Hope it inspires some newbies.
How did you decide the prop pitch?
Regards
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« Reply #101 on: May 12, 2019, 10:04:36 PM »
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Hi Gladiator,

Looking great. Are you going to install the landing gear and perhaps ROG? Or too my drag on the first test bed? Either way wish you the best on your maiden.
 i guess too much weight to install your capacitor power plant? Although same capacitor could power both props? Looking forward to your video.
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« Reply #102 on: May 12, 2019, 10:46:07 PM »
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Prop pitch and pitch station given in plan. Pitch 45 deg. Used my pitch guage to set angle.

Yes need to put in the landing gear and tail skid. Installing capacitor power not a bad idea. Maybe be okay for single prop. Two motors may be a bit too heavy for the wing area to give enough lift. Maybe enlarge the size proportionately and two props powered by single cap could work.
The article on this also suggests final trimming flights using ROG as it is a bit awkward to launch properly holding two props.
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« Reply #103 on: May 12, 2019, 10:51:52 PM »
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Plan and article of model attached
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* Flailing_Arrow_Article.pdf (0 KB - downloaded 32 times.)
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« Reply #104 on: May 12, 2019, 11:07:10 PM »
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Article file size beyond limit. Will reduce file size and post
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« Reply #105 on: June 17, 2019, 10:43:59 PM »
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Was in Nagpur in 26th May to participate in an indoor event that was mainly held to try and set some good benchmarks in rubber power duration.
I was gradually cranking up the turns in each flight and reached a max of 2 mins 30 secs when a little carelessness caused a damage to the trailing edge spar of the wing. That put an end to further flights. Was hoping to reach atleast 4 mins but that was not to be.
Venue was a huge indoor facility- 12 badminton courts and height about 30 ft. Temperature was 45 degs and A/ or blowers could not be switched on. But was so concentrated on getting the rubber wound and ensuring the trim settings on the model were correct before each flight that Idid not feel the heat.
Video of one of the initial flights

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« Reply #106 on: June 17, 2019, 10:59:33 PM »
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Sir,
I’ll be your shishya.
After I send you my guru dakshina...
Regards
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« Reply #107 on: June 18, 2019, 07:36:42 AM »
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Hi KK
Will be more than happy to share my experience and knowledge of indoor rubber power gained over the years.
If all goes well a major indoor event is planned by AMAI at the end of this year in Pune or Nagpur. Open to all Aeromodellers. Would be happy if more participants join the event. Now is the time to start preparing and getting things ready.
Anant
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« Reply #108 on: June 20, 2019, 11:41:14 AM »
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Super flight sir. Hats Off
these models need small detailed attention and lot of patience.
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« Reply #109 on: June 20, 2019, 12:08:54 PM »
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Manoj— see my post on the capacitor power model thread and see what happens when a little detail is missed out.
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« Reply #110 on: June 20, 2019, 06:33:47 PM »
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sir, saw that nose dive also.
summer heat makes glue melt and less sticky.
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« Reply #111 on: June 20, 2019, 08:55:45 PM »
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Not so much heat affecting the tape glue. More because I had used silicon lubricant for my earlier rubber power flights and fingers had traces of silicon which got rubbed on to the wing post so tape was not sticking very well.
That silicon lubricant is very slippery stuff and just a small speck is enough to make things slip.
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« Reply #112 on: August 18, 2019, 08:24:02 PM »
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Hi all,

Its been raining cats and dogs for almost a month so got down to some experimental construction.
First an High aspect Ratio A6 - the restriction in this class of model is that the wing can have a max area of 30 sq inches. So one can basically play around with the aspect ratio. Pics below. Paddle Prop is yet to be added.

The second was a contrast model that has a very low aspect Ratio -- the Lazy Bee. This actually an RC model but has the right parameters for a Walk Along Glider -- basically very close coupled wing and tail plane. Saw a youtube video where he had made it into a slope soarer. So I thought I would scale it down to make a very light Indoor Slope Soarer (aka Walk Along Glider)
The original model was 40 inch wing span. Scaled it down to 20% to make an indoor walk along glider.

Link of the Lazy Bee full size Slope Soarer


Short test flights in the drawing room seem encouraging. Video of flights in larger indoor space soon.
Pics of these models below
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Lazy Bee 1.jpg
Re: 1st Rubber Power model
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« Reply #113 on: August 18, 2019, 08:27:33 PM »
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Planning to get into Slope Soaring. Goa has some ideal locations - high cliffs with vertical drop close to the sea that will give good updraft conditions to keep slope glider in the air well.
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« Reply #114 on: August 19, 2019, 04:24:22 AM »
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@Glidiator.  What an amazing grace........

A superb show of taming the nature’s power.
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« Reply #115 on: August 19, 2019, 07:43:10 AM »
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@Dreamliner. Yes it is the sheer elegance and the fact that all this with no power
- just using the power of the wind. Thats what has motivated me me try it out.
Looks easy but will need some practice to get it right.
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« Reply #116 on: August 20, 2019, 12:43:41 PM »
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Hi all

Completed high aspect ratio A6 with paddle prop.
Observe the half semi circle prop hub made from the opening ring of the aluminium beer can.
It is actually a tube so very stiff , and very light comparable to the aircraft aluminium nose hubs sold   quite expensively by some in USA for indoor free flight models.
Also one can adjust it for required down thrust, side thrust for trimming easily.
Test flights in Indoor space soon.
Pics follow. Having trouble resizing
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« Reply #117 on: September 08, 2019, 07:25:51 AM »
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Hi all,
Now on my construction board a yesteryear’s model.
A twin prop outdoor rubber powered model.
The Peabody Packet
My first twin prop.
A fairly easy build as it has solid motor sticks and not hollow nacelles.
Is an interesting design. Will have to see how well it flies. Plan and article
being reduced in file size for posting
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« Reply #118 on: September 08, 2019, 09:26:25 AM »
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Here’s the link to the article and plan of the twin prop Peabody Packet

https://1drv.ms/b/s!AmSJek9jWKPSg-pPALb5ze61Z2zwCQ

https://1drv.ms/b/s!AmSJek9jWKPSg-pO_kZD4SwoLP4DaQ
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« Reply #119 on: September 08, 2019, 08:11:48 PM »
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Hi all,
The twin prop “Peabody Packet” is under construction.
Fuselage yet to be covered and wing glued to it.
Prop booms are held by rubber bands to wing. The inverted V tail is held together at the top vertex by small tabs which are tied tight with a thin string. Not in the plan but have done this so I can dismantle each boom for easy storage. Plan to attach main wing to fuselage also with rubber bands so it can be detached for easy storage and transportation.
Wing, fuselage and tail coverings are all thin grocery bag plastic. Plan says condenser paper or Japanese tissue— but with the kind of humidity in Goa paper will make the surfaces warp.
Pics being reduced for attaching.
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« Reply #120 on: September 08, 2019, 08:44:28 PM »
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Await pics.
Nothing shows in the links you posted earlier today.
Regards

PS: can’t find it in Google  Huh?
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« Reply #121 on: September 08, 2019, 08:47:29 PM »
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@KK
Will reduce file sizes and post again.
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« Reply #122 on: September 08, 2019, 09:02:51 PM »
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Some pics of the model.

Wing attached to boom by rubber band. Inverted V tail held at top vertex by a thread tied to very small tabs. So booms can be dismantled for storage/ transportation.
Plan to make arrangement for attaching wing to fuselage by rubber bands. So everything can be dismantled.
Will reduce plan and article and post asap.
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« Reply #123 on: September 08, 2019, 09:31:28 PM »
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Pics of model

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« Reply #124 on: September 08, 2019, 09:33:36 PM »
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Seem to be having some problems attaching pics.
Has anyone been able to download or open pics attached.
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