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View Full Version : MM P-38 Back in Production


buzzltyr
07-12-2006, 12:39 PM
For those interested in Parkflyer warbirds, the Mike Molt designed, Mountain Models produced P-38 is back in production:
http://www.mountainmodels.com/product_info.php?cPath=25_29_74&products_id=408&osCsid=8a2454b5a60b5a76ad555e701566bd0d

I built one of these two years ago, and it was a terrific flyer, until I was flying too low and lost it in a setting sun. Very scale in appearance. There are a number of build threads on RCGroups, for those who may have an interest.

Mark

Bill G
07-12-2006, 09:44 PM
I thought about building one. I like the idea of keeping it light, with a plane designed for LPS motors with GWS gearbox. Nice for 12mm Feigo brushless motors. An LHS had 2 of them for a good year at least. I told a forum member about the hobby shop, who asked about availability of the plane, and he ordered them both. I guess I can get one agian now, if I want one.

PerlAddict
07-13-2006, 10:37 PM
Very cool! I'm tempted to buy one just to have it around in a couple of years when I'm actually ready to build something like that. Love those P-38's. That one looks great!

Bill G
07-14-2006, 05:18 AM
Very cool! I'm tempted to buy one just to have it around in a couple of years when I'm actually ready to build something like that. Love those P-38's. That one looks great!

I thought about sheeting just the front portion of the cocpit and boom outers with light 1/32 balsa. Would really look great then, and still not be too heavy.

firemanbill
07-19-2006, 05:41 PM
Well I go home for lunch and I see my wife standing there with a look in her eye like you've done it now. I think to myslef what did I order that I did not tell her about... hmmmmm

Anyway she says go look at your son:eek: I go into the den and see him all laid back in the chair staring at the computer screen, a little drool coming out the corner of his mouth and this big 'ol monitor of mine staring back with the MM P-38 on it.:D

I may have accidentally told him about it and somehow wrote the link down for him to go see.... ;)




Mission accomplished!

FinnFlyer
07-25-2006, 03:06 PM
I have one of these kits, and It'll be built in due time.
I also have 2 SK400xt's to go on it with 2 10A ESC's, to swing 2 7x6 props.
Do you think this is too much motor?
Think it will hover?

Bill G
07-26-2006, 04:45 AM
I have one of these kits, and It'll be built in due time.
I also have 2 SK400xt's to go on it with 2 10A ESC's, to swing 2 7x6 props.
Do you think this is too much motor?
Think it will hover?

The beauty of the plane is its design for geared LPS 12mm motors. Do it with the right Feigo brushless setup with GWS gearboxes and low cost CC Tbird9 ESCs, and you'll be quite amazed. The thrust is the most impressive feature of these brushless LPS geared setups. I believe that BP seems to have the combos worked out. I think there are setups that can give 12oz thrust. That would be 24oz total. Built light, as designed, you could probably build the plane at 15-17oz with the setup (a good guess), and hover. A TP 3s-1320 would power the setup well. Using a lightweight covering would help, if hoverings a goal, with this setup. I don't know what a Lightning would be like to hover, though:eek: . I thought they liked low aspect ration wings, with large control surfaces and throws for that. I don't/can't hover anything.

Go brushless LPS with Mike Molts design. I'm sure you'll love it. I want to build both this and the Hellcat, but I've already built 2 Hellcats, and bought the GP foamie recently.:eek: Don't need another, so I may build the P38 soon.

Edit: here it is, from BP Hobbies:

Catalog (http://www.bphobbies.com/view.asp?id=V819427) > Electric Motors and Parts (http://www.bphobbies.com/view.asp?id=V641268) > Brushless Inrunners (http://www.bphobbies.com/view.asp?id=A1190095) > Feigao 120 - 12mm IPS Size Previous Item (http://www.bphobbies.com/View.asp?id=V001105&pid=U832265) Next Item (http://www.bphobbies.com/View.asp?id=V001105&pid=U025875) Show All Items (http://www.bphobbies.com/View.asp?id=V001105) Add To Shopping Cart (http://javascript<b></b>: AROnClick('Add');) Feigao 1208436L 12x30mm Brushless Motor Item: 2 of 6 http://www.bphobbies.com/pimages2/1208436x.jpg (http://www.bphobbies.com/view.asp?id=V001105&pid=U117989&img=l)
Click on image for larger or alternate view. Designation: 1208436L Turns: 36 Max Amps: 4 Resistence: 0.5850 RPM/V: 4122 IO(A): 0.3 Shaft Size: 1.5mm Diameter / 6mm Length Weight: 17 grams / 0.60 oz. Dimensions: 12 mm Diameter x 31mm Long High powered 12mm diameter by 30mm length 17 gram brushless motor. It has a 1.5mm motor shaft. This motor is an exact replacement for the GWS IPS motor and uses the same motor mounting screws.
Thrust data for the Feigao 1208436 (http://www.bphobbies.com/view.asp?id=A0320074) We performed endurance testing on a single 1208436 for 5.5 hours. The motor kept going strong so we gave up. We were using an IPS-D gear box at 11.1V with EP-1147 prop. We ran two tests below on the same day on the same motor: Test #1
2 hours straight Average Thrust 11.9 oz
Average Watts 33
Average Amp 2.9
Test #2
3.5 hours straight Average Thrust 11.9 oz
Average Watts 32
Average Amp 2.9

Twmaster
07-26-2006, 06:17 AM
I too think the 400XT motors are going to be overkill writ large as the 400XT will fly a 15 ounce foamie warbird at insane speeds. I saw one of those little 12MM BL motors a couple of weeks ago at the 'Warbirds over Delaware'. Oh my they are tiny! I really need to get one to play with.

Bill G
07-26-2006, 09:51 PM
I too think the 400XT motors are going to be overkill writ large as the 400XT will fly a 15 ounce foamie warbird at insane speeds. I saw one of those little 12MM BL motors a couple of weeks ago at the 'Warbirds over Delaware'. Oh my they are tiny! I really need to get one to play with.

Yes you do. They are fun little toys. I have at least one of almost every version. The smallest one seems less powerful than a brushed LPS Mabuchi, but at much greater efficiency, though. I remember it putting out respectable power, for as small as it is, at something like 2 amps.
The 25 motor is very powerful for its size. I was just bursting my EDF50 twin with them yesterday, at well over 150W on the wattmeter. Don't want to do that for long, though. BP's data is very conservative. You can abuse these little buggers much more than their charts would indicate.