A New 2.4gr 1/72nd Scale 3ch SE-5 Biplane - RC Groups
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Jul 08, 2004, 11:07 AM
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Keennon's Avatar

A New 2.4gr 1/72nd Scale 3ch SE-5 Biplane

Just finished test flying this new model, so I thought I'd share it with the group. I built a 1/72nd scale SE-5 sport scale model from sheet balsa. It's total weight is 2.4gr, span is a bit over 4 inches. It uses muscle wire for rudder and elevator control, about 60 position resolution. A 2.5V regulator drives the actuator to keep the travel and current down. The motor is the 4x8mm pager, low resistance, from Didel. Pretty much everything is custom/scratch from the radio to the gears to the prop. Radio is UHF frequency. Battery is the 20 mahr Kokam. Basically similar setup as my Ryan, but this is smaller overall and has a smaller motor. It flies wonderfully, very responsive, lots of climb, don't have a endurance time yet, should be a few minutes at least. The wing loading is around 2 oz/sq ft.
Hope you find it interesting, thanks. -Matt Keennon
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Jul 08, 2004, 11:17 AM
Registered User
Congratulation !
This is the coooolest model I have seen.
Love to take a closer look at it at NEAT.
Jul 08, 2004, 11:19 AM
Registered User
That is the coolest model I have ever seen.
Jul 08, 2004, 12:03 PM
Registered User
Matt, you're the master!

This is indeed one of the niciest planes I've ever seen. Do you have anything to share about the UHF radio? Do you have a custom Tx as well, or do you hijack the output of a standard RC Tx (master-student port?) and feed the data into a custom transmitter? I tink I can see an Rx module in the model (the metallic canister), does it run on 433MHz? The antenna length seems to indicate something around that ...

Jul 08, 2004, 12:11 PM
Registered User
gbarc's Avatar
Very cool Matt! Very cool indeed!!

Jul 08, 2004, 12:22 PM
Team 30 Micro EDF
Mike Taylor's Avatar

Awesome. It seems you have found a way to make the KBA look big! How thin did you mill the wing surfaces?
Jul 08, 2004, 12:28 PM
Micro Brushless crazy
Uttam1's Avatar
Wow! Matt, each one of your planes is better than the rest!! Excellent SE-5 Bipe!

Jul 08, 2004, 12:35 PM
Designer of Flying Things
-=SLaPPiE=-'s Avatar
Wow! is right, that is a great piece of work. Thank you for sharing it with us.

[scratches head...UHF radio...range must be global]

Please tell us all about the radio.

Jul 08, 2004, 12:43 PM
Registered User
Awesome... SE-5,great work
any videos?

Jul 08, 2004, 02:07 PM
Sticky Shepherd
Graham Stabler's Avatar
Had to be done, Se5's are great!!! This one is not great, even better, small!!!

Cool as usual Matt.

Q: Gear ratio and prop diameter? Look like watch gears?

Jul 08, 2004, 02:14 PM
Registered User
Real Good Show, Matt. It looks like you are putting a logo on your props now ??

Jul 08, 2004, 02:14 PM
Frequent Poster
Pete P.'s Avatar
WOW! Awesome!! Do you have a weight breakdown??? That thinks kicks ass.
Jul 08, 2004, 03:19 PM
^-- breaks stuff
nihil's Avatar
absolutely *beautiful*
Jul 08, 2004, 03:44 PM
Registered User
chaitanya's Avatar
superb plane,
thats ur trademark
would love to see a video
Jul 08, 2004, 03:48 PM
in persuit of low wing loading
Gordon Johnson's Avatar
I'm with Mike on this one. This plane makes a 4mm pager motor look huge. Great job. Now if you can get your friend to do the companion Fokker you could re-create your dogfights, but this time with palm-sized planes.


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