Author Topic: Club Pylon Comps (Read 11255 times)

Gareth · « **Reply #135 on:** February 16, 2010, 19:29:49 »

Hi,

That looks good, looks like a simple build as well, just slip it all together and add a little glue.

Good to hear you got a Slipso, would be interested in what you think about the model.

Gareth

phild · « **Reply #136 on:** February 17, 2010, 11:43:06 »

I have just run up the power train that we have proposed for the Slipso with the following results.

Using a 4.75X4.75 prop and 2s 2200 battery.
on starting 64w 8.6a dropping back to 58w 8a and running at that for about 5min at full throttle, using just over half of the battery capacity.

Is this enough or do we need to look at the prop size? by the way I have cornered the market on 4.75X4.75 props from Slough model shop they now have non left

Gareth · « **Reply #137 on:** February 17, 2010, 11:51:11 »

Looking at the specs of a standard 400 brushed, this should be similar, its going to have to be a case of trying it out and see how the model fly's. The motor can take a bigger prop so we can experiment but the figures that we worked out should fly the model perfectly.

Gareth

phild · « **Reply #138 on:** February 17, 2010, 11:59:23 »

Just to add to the above the motor became warm to the touch but nothing excessive as I held it in my hand throughout the run, the esc remained cold and the battery remained cold. I don't have a rev counter so I am unable to give the revs and prop speed.
Phil

Gareth · « **Reply #139 on:** February 18, 2010, 09:28:04 »

Phil,

Thank you for the update on the motor, both of mine have arrived but i am yet to test them. I will try and get the results at some point I also have a tacho so can get the rpm... I will see if i can bring it down on sunday (if you could bring your setup) and we can get the results.

I haven't got anymore emails about the delivery, i will check the online tracking again when home tonight and let you all know if anything has changed.

Gareth

Tim Marshall · « **Reply #140 on:** February 18, 2010, 17:09:23 »

I just weighed a piece of brown paper and it came in at 93gm m2, glue won't add much to that but it is relatively heavy compared to to lightest glass cloth at 24gm m2 plus the same again for the resin if one is careful so around 50gm m2 for 1 layer. Glass would be much lighter if using WBPU.

phild · « **Reply #141 on:** February 18, 2010, 17:18:27 »

Dave,
I think everyone is concerned about prop speed that is why the 4.75X4.75 was chosen I personally think we will have a little problem in hand launching with this setup, I would sooner go for a 6 x Something, but we must see what happens when we have a Slipso ready to go.

Phil

Gareth · « **Reply #142 on:** February 18, 2010, 18:56:16 »

The motor has a hand written 2200, it does look like the second 2 could have been a 7 but it is a 2.
I have launched similar models on a brushed 400 and this is going to be lighter so i don't think it will be a real issue.

Gareth

crazy frog · « **Reply #143 on:** February 18, 2010, 19:17:38 »

what rpm are you hoping for Gareth......it should be fine for launch on the 4.75 Phil, the one you don't want to use is the 4.1 x 4.1 you need arms of a javelin thrower to get them in the air with that prop.

i pick up my slypso sunday, dont know what motor is in it but hopefully i can get it in the air fairly quickly to see what its like

Darren

Gareth · « **Reply #144 on:** February 18, 2010, 21:33:19 »

Take a look at "Combination 2" on here, thats the setup we have gone with.

Gareth

Gareth · « **Reply #145 on:** February 18, 2010, 21:57:40 »

Tracking update:
Into Foreign Customs, February 18, 2010, 10:27 am, GREAT BRITAIN

now we just have to hope that it goes through ok and turns up on the door step soon

Gareth

Chris · « **Reply #146 on:** February 18, 2010, 22:16:49 »

Don't forget you also have the option of putting a 3S pack in it if the performance on 2S falls well short of what you're expecting.

Gareth · « **Reply #147 on:** February 19, 2010, 09:41:53 »

I have just done another quick calculation and with a 3s pack it would draw 18 amps and give a speed of 91Mph. with that we could also go with a slightly bigger prop to get even more speed and thrust.

Gareth

Chris · « **Reply #148 on:** February 19, 2010, 16:10:34 »

Think I'll wait till you chaps test your setup before I go investing in any new 2s packs

Gareth · « **Reply #149 on:** February 19, 2010, 16:25:34 »

I will get one of mine built quickly and try it out on a couple of different combo's to get workout what works best. if we work on the figures then it should be better then the brushed 400 and that was fine on the VIP.

Gareth